Intercurrent coccidiosis and necrotic enteritis of chickens: rational, integrated disease management by maintenance of gut integrity

References

• Allen , PC , Danforth , HD and Augustine , PC . (1998) . Dietary modulation of avian coccidiosis . International Journal for Parasitology , 28 : 1131 – 1140 .
   PubMed Web of Science ®Google Scholar
• Allen , WM , Berrett , S , Hein , H and Hebert , CN . (1973) . Some physiopathological changes associated with experimental Eimeria brunetti infection in the chicken . Journal of Comparative Pathology , 83 : 369 – 375 .
   PubMed Web of Science ®Google Scholar
• Al-Sheikhly , F and Al-Saieg , A . (1980) . Role of coccidia in the occurrence of necrotic enteritis of chickens . Avian Diseases , 24 : 324 – 333 .
   PubMed Web of Science ®Google Scholar
• Al-Sheikhly , F and Truscott , RB . (1977a) . The interaction of Clostridium perfringens and its toxins in the production of necrotic enteritis of chickens . Avian Diseases , 21 : 256 – 263 .
   PubMed Web of Science ®Google Scholar
• Al-Sheikhly , F and Truscott , RB . (1977b) . The pathology of necrotic enteritis of chickens following infusion of crude toxins of Clostridium perfringens into the duodenum . Avian Diseases , 21 : 241 – 255 .
   PubMed Web of Science ®Google Scholar
• Anderson , WI , Reid , WM , Lukert , PD and Fletcher , OJ . (1977) . Influence of infectious bursal disease on the development of immunity to Eimeria tenella . Avian Diseases , 21 : 637 – 641 .
   PubMed Web of Science ®Google Scholar
• Annett , CB , Viste , JR , Chirino-Trejo , M , Classen , HL , Middleton , DM and Simko , E . (2002) . Necrotic enteritis: effect of barley, wheat and corn diets on proliferation of Clostridium perfringens type A . Avian Pathology , 31 : 598 – 601 .
   PubMed Web of Science ®Google Scholar
• Anonymous (2000) Link between coccidiosis and necrotic enteritis still uncertain Poultry Digest 59, 6, 32, 34
   Google Scholar
• Anonymous . (2003) . Watering system is the key to healthy poultry flocks . Poultry International , 42 : 36 – 38 .
   Google Scholar
• Arakawa , A and Ohe , O . (1975) . Reduction of Clostridium perfringens by feed additive antibiotics in the ceca of chickens infected with Eimeria tenella . Poultry Science , 54 : 1000 – 1007 .
   PubMed Web of Science ®Google Scholar
• Aylott , MV , Vestal , OH , Stephens , JF and Turk , DE . (1968) . Effect of coccidial infection upon passage rates of digestive tract contents of chicks . Poultry Science , 47 : 900 – 904 .
   PubMed Web of Science ®Google Scholar
• Baba , E , Wakeshima , H , Fukui , K , Fukata , T and Arakawa , A . (1992a) . Adhesion of bacteria to the cecal mucosal surface of conventional and germ-free chickens infected with Eimeria tenella . American Journal of Veterinary Research , 53 : 194 – 197 .
   PubMed Web of Science ®Google Scholar
• Baba , E , Fuller , AL , Gilbert , JM , Thayer , SG and McDougald , LR . (1992b) . Effects of Eimeria brunetti infection and dietary zinc on experimental induction of necrotic enteritis in broiler chickens . Avian Diseases , 36 : 59 – 62 .
   PubMed Web of Science ®Google Scholar
• Baba , E , Ikemoto , T , Fukata , T , Sasai , K , Arakawa , A and McDougald , LR . (1997) . Clostridial population and the intestinal lesions in chickens infected with Clostridium perfringens and Eimeria necatrix . Veterinary Microbiology , 54 : 301 – 308 .
   PubMed Web of Science ®Google Scholar
• Babu , M . (1992) . Diarrhoea and wet litter in poultry . Poultry Adviser , 25 (9) : 41 – 45 .
   Google Scholar
• Bains , BS . (1968) . Necrotic enteritis of chickens . Australian Veterinary Journal , 44 : 40
   PubMed Web of Science ®Google Scholar
• Banfield , MJ and Forbes , JM . (1999) . Feed content and structure effects on coccidiosis . World Poultry, Special Supplement Coccidiosis , 3 : 34 – 36 .
   Google Scholar
• Barnes , EM , Mead , GC , Barnum , DA and Harry , EG . (1972) . The intestinal flora of the chicken in the period 2 to 6 weeks of age, with particular reference to the anaerobic bacteria . British Poultry Science , 13 : 311 – 326 .
   PubMed Web of Science ®Google Scholar
• Barnes , EM , Impey , CS and Cooper , DM . (1980) . Manipulation of the crop and intestinal flora of the newly hatched chick . American Journal of Clinical Nutrition , 33 : 2426 – 2433 .
   PubMed Web of Science ®Google Scholar
• Barrow PA (1992) Probiotics for chickens In R. Fuller (Ed.) Probiotics: The Scientific Basis pp. 225–257 London Chapman & Hall
   Google Scholar
• Bar-Shira , E , Sklan , D and Friedman , A . (2003) . Establishment of immune competence in the avian GALT during the immediate post-hatch period . Developmental and Comparative Immunology , 27 : 147 – 157 .
   PubMed Web of Science ®Google Scholar
• Becker ER (1934) Coccidia and Coccidiosis of Domesticated, Game and Laboratory Animals and of Man Ames IA Collegiate Press
   Google Scholar
• Bedrník P (1993) Livacox, A Vaccine against Coccidiosis of Domestic Fowl Jilové Czech Republic Research Institute of Feed Supplements and Veterinary Drugs
   Google Scholar
• Ben-Nathan , B , Drabkin , N and Heller , D . (1981) . The effect of starvation on the immune response of chickens . Avian Diseases , 25 : 214 – 217 .
   PubMed Web of Science ®Google Scholar
• Bennetts , HW . (1930) . Bacillus welchii and bowel lesions. With special reference to a case of coccidiosis . Australian Veterinary Journal , 6 : 153 – 154 .
   Google Scholar
• Benno , Y , Endo , K , Shiragami , N and Mitsuoka , T . (1988) . Susceptibility of fecal anaerobic bacteria from pigs and chickens to five polyether antibiotics for growth promotion . Japanese Journal of Veterinary Science , 50 : 783 – 790 .
   PubMedGoogle Scholar
• Bernier , G and Filion , R . (1971) . Necrotic enteritis in broiler chickens . Journal of the American Veterinary Medical Association , 158 : 1896 – 1897 .
   Web of Science ®Google Scholar
• Bernier , G , Phaneuf , J-B and Filion , R . (1974) . Entérite nécrotique chez le poulet de gril. I. Aspect clinico-pathologique . Canadian Journal of Comparative Medicine , 38 : 280 – 285 .
   PubMedGoogle Scholar
• Best , P . (2004) . Novel ingredients: seeds into feeds . Feed International , 25 (11) : 26 – 27 .
   Google Scholar
• Biggs , PM . (1982) . The world of poultry disease . Avian Pathology , 11 : 281 – 300 .
   PubMed Web of Science ®Google Scholar
• Biggs , PM , Long , PL , Kenzy , SG and Rootes , DG . (1968) . Relationship between Marek's disease and coccidiosis. II. The effect of Marek's disease on the susceptibility of chickens to coccidial infection . Veterinary Record , 83 : 284 – 298 .
   PubMed Web of Science ®Google Scholar
• Biggs , PM , Long , PL , Kenzy , SG and Rootes , DG . (1969) . Investigations into the association between Marek's disease and coccidiosis . Acta Veterinaria, Brno , 38 : 65 – 75 .
   Google Scholar
• Bolder , NM , Wagenaar , JA , Putirulan , FF , Veldman , KT and Sommer , M . (1999) . The effect of flavophospholipol (Flavomycin) and salinomycin sodium (Sacox) on the excretion of Clostridium perfringens, Salmonella enteritidis, and Campylobacter jejuni in broilers after experimental infection . Poultry Science , 78 : 1681 – 1689 .
   PubMed Web of Science ®Google Scholar
• Bradley , RE and Radhakrishnan , CV . (1973) . Coccidiosis in chickens: obligate relationship between Eimeria tenella and certain species of cecal microflora in the pathogenesis of the disease . Avian Diseases , 17 : 461 – 476 .
   PubMed Web of Science ®Google Scholar
• Branton , SL , Reece , FN and Hagler , WM . (1987) . Influence of a wheat diet on mortality of broiler chickens associated with necrotic enteritis . Poultry Science , 66 : 1326 – 1330 .
   PubMed Web of Science ®Google Scholar
• Branton , SL , Lott , BD , Deaton , JW , Maslin , WR , Austin , FW , Pote , LM , Keirs , RW , Latour , MA and Day , EJ . (1997) . The effect of added complex carbohydrates or added dietary fiber on necrotic enteritis lesions in broiler chickens . Poultry Science , 76 : 24 – 28 .
   PubMed Web of Science ®Google Scholar
• Brennan JJ Cheng T (1997) Efficacy of lasalocid for prevention of necrotic enteritis in broiler chickens In Proceedings of the VIIth International Coccidiosis Conference (p. 118) Oxford UK
   Google Scholar
• Brennan , J , Bagg , R , Barnum , D , Wilson , J and Dick , P . (2001) . Efficacy of narasin in the prevention of necrotic enteritis in broiler chickens . Avian Diseases , 45 : 210 – 214 .
   PubMed Web of Science ®Google Scholar
• British Oil & Cake Mills (1964) Common Diseases of Poultry Erith British Oil & Cake Mills
   Google Scholar
• Britton , WM , Hill , CH and Barber , CW . (1964) . A mechanism of interaction between dietary protein levels and coccidiosis in chicks . Journal of Nutrition , 82 : 306 – 310 .
   PubMed Web of Science ®Google Scholar
• Broussard , CT , Hofacre , CL , Page , RK and Fletcher , OJ . (1986) . Necrotic enteritis in cage-reared commercial layer pullets . Avian Diseases , 30 : 617 – 619 .
   PubMed Web of Science ®Google Scholar
• Bumstead , N and Millard , BJ . (1992) . Variation in susceptibility of inbred lines of chickens to seven species of Eimeria . Parasitology , 104 : 407 – 413 .
   PubMed Web of Science ®Google Scholar
• Catchpole J (2000) The diagnosis and misdiagnosis of coccidiosis in chickens In Proceedings of Coccidiosis Conference (7th International Poultry Health Conference) Hannover, Germany (4 pp., unpaginated) Driffield UK Positive Action Publications
   Google Scholar
• Chapman HD (1978) Drug resistance in coccidia In P.L. Long, K.N. Boorman & B.M. Freeman (Eds.) Avian Coccidiosis pp. 387–412 Edinburgh British Poultry Science
   Google Scholar
• Chapman HD (1982) Anticoccidial drug resistance In P.L. Long (Ed.) The Biology of the Coccidia pp. 429–452 London Edward Arnold
   Google Scholar
• Chapman , HD . (1984) . Drug resistance in avian coccidia (a review) . Veterinary Parasitology , 15 : 11 – 27 .
   PubMed Web of Science ®Google Scholar
• Chapman HD (1986) Drug resistance in coccidia: recent research In L.R. McDougald, L.P. Joyner & P.L. Long (Eds.) Research in Avian Coccidiosis pp. 330–347 Athens University of Georgia
   Google Scholar
• Chapman , HD . (1994) . Sensitivity of field isolates of Eimeria to monensin following the use of a coccidiosis vaccine in broiler chickens . Poultry Science , 73 : 476 – 478 .
   PubMed Web of Science ®Google Scholar
• Chapman , HD . (1996) . Restoration of drug sensitivity following the use of live coccidiosis vaccines . World Poultry, Special Supplement Coccidiosis , 2 : 20 – 21 .
   Google Scholar
• Chapman , HD . (1997) . Biochemical, genetic and applied aspects of drug resistance in Eimeria parasites of the fowl . Avian Pathology , 26 : 221 – 244 .
   PubMed Web of Science ®Google Scholar
• Chapman , HD . (2000a) . Practical use of vaccines for the control of coccidiosis in the chicken . World's Poultry Science Journal , 56 : 7 – 20 .
   Web of Science ®Google Scholar
• Chapman HD (2000b) Long-term anticoccidial strategy: chemotherapy plus vaccination Feed International, March 18 19
   Google Scholar
• Chapman , HD , Cherry , TE , Danforth , HD , Richards , G , Shirley , MW and Williams , RB . (2002) . Sustainable coccidiosis control in poultry production: the role of live vaccines . International Journal for Parasitology , 32 : 617 – 629 .
   PubMed Web of Science ®Google Scholar
• Char , NL , Khan , DI , Rao , MRK , Gopal , V and Narayana , G . (1986) . A rare occurrence of clostridial infections in poultry . Poultry Adviser , 19 (11) : 59 – 62 .
   Google Scholar
• Clark , DT , Smith , CK and Dardas , RB . (1962) . Pathological and immunological changes in gnotobiotic chickens due to Eimeria tenella . Poultry Science , 41 : 1635 – 1636 .
   Web of Science ®Google Scholar
• Coles , B , Biely , J and March , BE . (1970) . Vitamin A deficiency and Eimeria acervulina infection in the chick . Poultry Science , 49 : 1295 – 1301 .
   PubMed Web of Science ®Google Scholar
• Collins , MS , Gough , RE , Alexander , DJ and Parsons , DG . (1989) . Virus-like particles associated with a “wet litter” problem in chickens . Veterinary Record , 124 : 641
   PubMed Web of Science ®Google Scholar
• Colnago , GL , Gore , T , Jensen , LS and Long , PL . (1983) . Amelioration of pale bird syndrome in chicks by vitamin E and selenium . Avian Diseases , 27 : 312 – 316 .
   PubMed Web of Science ®Google Scholar
• Colnago , GL , Jensen , LS and Long , PL . (1984) . Effect of selenium and vitamin E on the development of immunity to coccidiosis in chickens . Poultry Science , 63 : 1136 – 1143 .
   PubMed Web of Science ®Google Scholar
• Conway DP McKenzie ME (1991) Poultry Coccidiosis Diagnostic and Testing Procedures 2nd edn New York Pfizer
   Google Scholar
• Corpet , DE . (2000) . Mécanismes de la promotion de croissance des animaux par les additifs alimentaires antibiotiques . Revue de Médecine Vétérinaire , 151 : 99 – 104 .
   Google Scholar
• Cowen , BS , Schwartz , LD , Wilson , RA and Ambrus , SI . (1987) . Experimentally induced necrotic enteritis in chickens . Avian Diseases , 31 : 904 – 906 .
   PubMed Web of Science ®Google Scholar
• Craven , SE , Stern , NJ , Cox , NA , Bailey , JS and Berrang , M . (1999) . Cecal carriage of Clostridium perfringens in broiler chickens given Mucosal Starter Culture . Avian Diseases , 43 : 484 – 490 .
   PubMed Web of Science ®Google Scholar
• Craven , SE , Stern , NJ , Bailey , JS and Cox , NA . (2001a) . Incidence of Clostridium perfringens in broiler chickens and their environment during production and processing . Avian Diseases , 45 : 887 – 896 .
   PubMed Web of Science ®Google Scholar
• Craven , SE , Cox , NA , Stern , NJ and Mauldin , JM . (2001b) . Prevalence of Clostridium perfringens in commercial broiler hatcheries . Avian Diseases , 45 : 1050 – 1053 .
   PubMed Web of Science ®Google Scholar
• Cuckler , AC , McManus , EC and Campbell , WC . (1969) . Development of resistance in coccidia . Acta Veterinaria, Brno , 38 : 89 – 99 .
   Google Scholar
• Danforth , HD . (1998) . Use of live oocyst vaccines in the control of avian coccidiosis: experimental studies and field trials . International Journal for Parasitology , 28 : 1099 – 1109 .
   PubMed Web of Science ®Google Scholar
• Davies SFM Joyner LP Kendall SB (1963) Coccidiosis Edinburgh Oliver and Boyd
   Google Scholar
• Devriese , LA , Daube , G , Hommez , J and Haesebrouck , F . (1993) . In vitro susceptibility of Clostridium perfringens isolated from farm animals to growth-enhancing antibiotics . Journal of Applied Bacteriology , 75 : 55 – 57 .
   PubMedGoogle Scholar
• Dhawale , A . (2004) . Necrotic enteritis—a silent profit robber . Poultry International , 43 (4) : 42 – 43 .
   Google Scholar
• Dibner , J . (2004) . Organic acids: can they replace antibiotic growth promoters? . Feed International , 25 (12) : 14 – 16 .
   Google Scholar
• Dickinson , EM . (1941) . The effects of variable dosages of sporulated Eimeria acervulina oocysts on chickens . Poultry Science , 20 : 413 – 424 .
   Google Scholar
• Drew , MD , Syed , NA , Goldade , BG , Laarveld , B and Van Kessel , AG . (2004) . Effects of dietary protein source and level on intestinal populations of Clostridium perfringens in broiler chickens . Poultry Science , 83 : 414 – 420 .
   PubMed Web of Science ®Google Scholar
• Droual , R , Shivaprasad , HL and Chin , RP . (1994) . Coccidiosis and necrotic enteritis in turkeys . Avian Diseases , 38 : 177 – 183 .
   PubMed Web of Science ®Google Scholar
• Drouin P (1999) Retour en force de l'entérite nécrotique Filières Avicoles (for 1999) 78 79
   Google Scholar
• Duffy , CF and Tucker , LA . (2003) . Natural treatments for avian coccidiosis . World Poultry, Special Supplement Coccidiosis , 4 : 9 – 10 .
   Google Scholar
• Dykstra , DD and Reid , WM . (1978) . Monensin, Eimeria tenella infection, and effects on the bacterial populations in the ceca of gnotobiotic chickens . Poultry Science , 57 : 398 – 402 .
   PubMed Web of Science ®Google Scholar
• Edgar , SA . (1954) . Effect of temperature on the sporulation of oocysts of the protozoan Eimeria tenella . Transactions of the American Microscopical Society , 73 : 237 – 242 .
   Google Scholar
• Edgar , SA . (1955) . Sporulation of oocysts at specific temperatures and notes on the prepatent period of several species of avian coccidia . Journal of Parasitology , 41 : 214 – 216 .
   PubMed Web of Science ®Google Scholar
• El-Boushy , AR . (1988) . Vitamin E affects viability, immune response of poultry . Feedstuffs , 60 : 20–26, 39
   Google Scholar
• Eleazer , TH and Harrell , JS . (1976) . Clostridium perfringens infection in turkey poults . Avian Diseases , 20 : 774 – 776 .
   PubMed Web of Science ®Google Scholar
• Elwinger , K and Teglöf , B . (1991) . Performance of broiler chickens as influenced by a dietary enzyme complex with and without antibiotic supplementation . Archiv für Geflügelkunde , 55 : 69 – 73 .
   Web of Science ®Google Scholar
• Elwinger K Engström B Berndtson E Fossum O Teglöf B (1992a) The effects of narasin on Clostridium perfringens in caeca and the occurrence of necrotic enteritis in broiler chickens In Proceedings XIX World's Poultry Congress, Amsterdam 3 pp. 580–584 Amsterdam The Netherlands
   Google Scholar
• Elwinger , K , Schneitz , C , Berndtson , E , Fossum , O , Teglöf , B and Engström , B . (1992b) . Factors affecting the incidence of necrotic enteritis, caecal carriage of Clostridium perfringens and bird performance in broiler chicks . Acta Veterinaria Scandinavica , 33 : 369 – 378 .
   PubMed Web of Science ®Google Scholar
• Elwinger , K , Engström , B , Fossum , O , Hassan , S and Teglöf , B . (1994) . Effect of coccidiostats on necrotic enteritis and performance in broiler chickens . Swedish Journal of Agricultural Research , 24 : 39 – 44 .
   Google Scholar
• Elwinger , K , Berndtson , E , Engström , B , Fossum , O and Waldenstedt , L . (1998) . Effect of antibiotic growth promoters and anticoccidials on growth of Clostridium perfringens in the caeca and on performance of broiler chickens . Acta Veterinaria Scandinavica , 39 : 433 – 441 .
   PubMed Web of Science ®Google Scholar
• Engberg , RM , Hedemann , MS and Jensen , BB . (2002) . The influence of grinding and pelleting of feed on the microbial composition and activity in the digestive tract of broiler chickens . British Poultry Science , 43 : 569 – 579 .
   PubMed Web of Science ®Google Scholar
• Engberg , RM , Hedemann , MS , Steenfeldt , S and Jensen , BB . (2004) . Influence of whole wheat and xylanase on broiler performance and microbial composition and activity in the digestive tract . Poultry Science , 83 : 925 – 938 .
   PubMed Web of Science ®Google Scholar
• Enigk , K and Dey-Hazra , A . (1976) . Activity of disaccharidases of the intestinal mucosa of the chicken during infection with Eimeria necatrix . Veterinary Parasitology , 2 : 177 – 185 .
   Web of Science ®Google Scholar
• Enigk , K , Schanzel , E , Scupin , E and Dey-Hazra , A . (1970) . Der enterale plasmaproteinverlust bei der coccidiose des Huhnes . Zentralblatt für Veterinärmedizin, Reihe B , 17 : 522 – 526 .
   PubMedGoogle Scholar
• Erasmus , J , Scott , ML and Levine , PP . (1960) . A relationship between coccidiosis and vitamin A nutrition of chickens . Poultry Science , 39 : 565 – 572 .
   Web of Science ®Google Scholar
• Erník , F and Bedrník , P . (2001) . Controlling coccidiosis in broiler growing . Poultry International , 40 (4) : 36 – 42 .
   Google Scholar
• Fayer R Reid WM (1982) Control of coccidiosis In P.L. Long (Ed.) The Biology of the Coccidia pp. 453–487 London Edward Arnold
   Google Scholar
• Fernando , MA and McCraw , BM . (1973) . Mucosal morphology and cellular renewal in the intestine of chickens following a single infection of Eimeria acervulina . Journal of Parasitology , 59 : 493 – 501 .
   PubMed Web of Science ®Google Scholar
• Frame , DD and Bickford , AA . (1986) . An outbreak of coccidiosis and necrotic enteritis in 16-week-old cage-reared layer replacement pullets . Avian Diseases , 30 : 601 – 602 .
   PubMed Web of Science ®Google Scholar
• Fukata , T , Hadate , Y , Baba , E , Uemura , T and Arakawa , A . (1988) . Influence of Clostridium perfringens and its toxin in germ-free chickens . Research in Veterinary Science , 44 : 68 – 70 .
   PubMed Web of Science ®Google Scholar
• Fukata , T , Hadate , Y , Baba , E and Arakawa , A . (1991) . Influence of bacteria on Clostridium perfringens infections in young chickens . Avian Diseases , 35 : 224 – 227 .
   PubMed Web of Science ®Google Scholar
• Fuller , R . (1989) . Probiotics in man and animals . Journal of Applied Bacteriology , 66 : 365 – 378 .
   PubMedGoogle Scholar
• Fuller , R . (2004) . What is a probiotic? . Biologist , 51 : 232
   Google Scholar
• Gardiner , MR . (1967) . Clostridial infections in poultry in Western Australia . Australian Veterinary Journal , 43 : 359 – 360 .
   PubMedGoogle Scholar
• Garrido , MN , Skjervheim , M , Oppegaard , H and Sorum , H . (2004) . Acidified litter benefits the intestinal flora balance of broiler chickens . Applied and Environmental Microbiology , 70 : 5208 – 5213 .
   PubMed Web of Science ®Google Scholar
• Geary TG Edgar SA Jensen JB (1985) Drug resistance in Protozoa In W.C. Campbell & R.S. Rew (Eds.) Chemotherapy of Parasitic Diseases pp. 209–236 New York Plenum Press
   Google Scholar
• George , BA , Quarles , CL and Fagerberg , DJ . (1982) . Virginiamycin effects on controlling necrotic enteritis infection in chickens . Poultry Science , 61 : 447 – 450 .
   PubMed Web of Science ®Google Scholar
• Gerriets , E . (1961) . The prophylactic action of vitamin A in caecal coccidiosis by protection of the epithelium . British Veterinary Journal , 117 : 507 – 515 .
   Google Scholar
• Geyra , A , Uni , Z and Sklan , D . (2001) . Enterocyte dynamics and mucosal development in the posthatch chick . Poultry Science , 80 : 776 – 782 .
   PubMed Web of Science ®Google Scholar
• Giese , W , Stoll , U , Dey-Hazra , A and Enigk , K . (1971) . Der Einfluss verschiedener Eimeria-Arten auf absorption und Stoffwechsel von 14C-Glucose bei Hühnerküken . Experimental Parasitology , 29 : 440 – 450 .
   PubMed Web of Science ®Google Scholar
• Graat , EAM , Henken , AM , Ploeger , HW , Noordhuizen , JPTM and Vertommen , MH . (1994) . Rate and course of sporulation of oocysts of Eimeria acervulina under different environmental conditions . Parasitology , 108 : 497 – 502 .
   PubMed Web of Science ®Google Scholar
• Grave , K , Kaldhusdal , M , Kruse , H , Harr , LMF and Flatlandsmo , K . (2004) . What has happened in Norway after the ban of avoparcin? Consumption of antimicrobials by poultry . Preventive Veterinary Medicine , 62 : 59 – 72 .
   PubMed Web of Science ®Google Scholar
• Gregory MW (1990) Pathology of coccidial infections In P.L. Long (Ed.) Coccidia of Man and Domestic Animals pp. 235–261 Boca Raton FL CRC Press
   Google Scholar
• Gutiérrez , Á. del Á. O . (2004) . Wheat for broilers . Feed International , 25 (12) : 22 – 24 .
   Google Scholar
• Hagenmüller P (1899) Bibliographie générale et spéciale des travaux concernant les sporozoaires Annales du Musée d'Histoire Naturelle de Marseille, série II Bulletin, tome I supplément 1 233
   Google Scholar
• Hammond DM Long PL (Eds.) (1973) The Coccidia Eimeria, Isospora, Toxoplasma, and Related Genera Baltimore MD University Park Press
   Google Scholar
• Hegde , KS , Reid , WM , Johnson , J and Womack , HE . (1969) . Pathogenicity of Eimeria brunetti in bacteria free and conventional chickens . Journal of Parasitology , 55 : 402 – 405 .
   PubMed Web of Science ®Google Scholar
• Heier , BT , Løvland , A , Soleim , KB , Kaldhusdal , M and Jarp , J . (2001) . A field study of naturally occurring specific antibodies against Clostridium perfringens alpha toxin in Norwegian broiler flocks . Avian Diseases , 45 : 724 – 732 .
   PubMed Web of Science ®Google Scholar
• Heijnen , G . (2004) . Conditioning and pelleting: the new generation . Feed International , 25 (7) : 22 – 24 .
   Google Scholar
• Helmboldt , CF and Bryant , ES . (1971) . The pathology of necrotic enteritis in domestic fowl . Avian Diseases , 15 : 775 – 780 .
   PubMed Web of Science ®Google Scholar
• Henry CW Murphy BD Norton RA (1995) Incidence of Clostridia [sic] perfringens on commercial broiler farms with a history of necrotic enteritis Poultry Science 74 (supplement 1) 51
   Google Scholar
• Hermans PG Morgan KL (2003) The epidemiology of necrotic enteritis in broiler chickens Research in Veterinary Science 74 (supplement A) 19
   Google Scholar
• Hetland , H , Svihus , B and Olaisen , V . (2002) . Effect of feeding whole cereals on performance, starch digestibility and duodenal particle size distribution in broiler chickens . British Poultry Science , 43 : 416 – 423 .
   PubMed Web of Science ®Google Scholar
• Hofacre , CL , Froyman , R , Gautrias , B , George , B , Goodwin , MA and Brown , J . (1998) . Use of Aviguard and other intestinal bioproducts in experimental Clostridium perfringens-associated necrotizing enteritis in broiler chickens . Avian Diseases , 42 : 579 – 584 .
   PubMed Web of Science ®Google Scholar
• Hofacre , CL , Beacorn , T , Collett , S and Mathis , G . (2003) . Using competitive exclusion, mannan-oligosaccharide and other intestinal products to control necrotic enteritis . Journal of Applied Poultry Research , 12 : 60 – 64 .
   Web of Science ®Google Scholar
• Hofshagen , M and Kaldhusdal , M . (1992) . Barley inclusion and avoparcin supplementation in broiler diets. 1. Effect on small intestinal bacterial flora and performance . Poultry Science , 71 : 959 – 969 .
   PubMed Web of Science ®Google Scholar
• Imondi , AR and Bird , FH . (1966) . The turnover of intestinal epithelium in the chick . Poultry Science , 45 : 142 – 147 .
   PubMed Web of Science ®Google Scholar
• Ispolatovskaya MV (1971) Type A Clostridium perfringens toxin In A.S. Kadis, T.C. Montie & S.J. Ajl (Eds.) Microbial toxins 2 Biology (pp. 108–158) New York Academic Press
   Google Scholar
• Ivanov , IE . (2001) . Treatment of broiler litter with organic acids . Research in Veterinary Science , 70 : 169 – 173 .
   PubMed Web of Science ®Google Scholar
• Jansson L Elwinger K Engström B Fossum O Teglöf B (1990) Test of the efficacy of virginiamycin and dietary enzyme supplementation against necrotic enteritis (NE) disease in broilers In Proceedings of the VIII Conferencia Europea de Avicultura Memoria 2 pp. 556–559 Barcelona Spain
   Google Scholar
• Jeffers TK (1978) Genetics of coccidia and the host response In P.L. Long, K.N. Boorman & B.M. Freeman (Eds.) Avian Coccidiosis pp. 51–125 Edinburgh British Poultry Science
   Google Scholar
• Jeffers TK (1989) Anticoccidial drug resistance: a review with emphasis on the polyether ionophores In P. Yvoré (Ed.) Coccidia and Intestinal Coccidiomorphs pp. 295–308 Paris INRA
   Google Scholar
• Johansson , A , Greko , C , Engström , BE and Karlsson , M . (2004) . Antimicrobial susceptibility of Swedish, Norwegian and Danish isolates of Clostridium perfringens from poultry, and distribution of tetracycline resistant genes . Veterinary Microbiology , 99 : 251 – 257 .
   PubMed Web of Science ®Google Scholar
• Johansson , KR and Sarles , WB . (1948) . Bacterial population changes in the ceca of young chickens infected with Eimeria tenella . Journal of Bacteriology , 56 : 635 – 647 .
   PubMed Web of Science ®Google Scholar
• Johnson , WT . (1923) . Avian coccidiosis . Poultry Science , 2 : 146 – 163 .
   Google Scholar
• Johnson , WT . (1927) . Two basic factors in coccidial infection of the chicken . Journal of the American Veterinary Medical Association , 70 : 560 – 584 .
   Google Scholar
• Johnston , WH , Karchesy , JJ , Constantine , GH and Craig , AM . (2001) . Antimicrobial activity of some Pacific Northwest woods against anaerobic bacteria and yeast . Phytotherapy Research , 15 : 586 – 588 .
   PubMed Web of Science ®Google Scholar
• Joyner , LP . (1970) . Coccidiosis: problems arising from the development of anticoccidial drug resistance . Experimental Parasitology , 28 : 122 – 128 .
   PubMed Web of Science ®Google Scholar
• Joyner LP (1978) The identification and diagnosis of avian coccidiosis In P.L. Long, K.N. Boorman & B.M. Freeman (Eds.) Avian Coccidiosis pp. 29–49 Edinburgh British Poultry Science
   Google Scholar
• Joyner , LP and Long , PL . (1974) . The specific characters of the Eimeria with special reference to the coccidia of the fowl . Avian Pathology , 3 : 145 – 157 .
   PubMedGoogle Scholar
• Joyner , LP , Patterson , DSP , Berrett , S , Boarer , CDH , Cheong , FH and Norton , CC . (1975) . Amino-acid malabsorption and intestinal leakage of plasma-proteins in young chicks infected with Eimeria acervulina . Avian Pathology , 4 : 17 – 33 .
   PubMedGoogle Scholar
• Julian , RJ . (1969) . Necrotic enteritis in chickens . Veterinary Services Branch, Ontario Department Agriculture and Food Quarterly Bulletin , 4 (2) : 2
   Google Scholar
• Kageyama , A , Fukata , T , Baba , E and Arakawa , A . (1987) . The influence of various bacteria on the cecal mucosa of monoflora chickens infected with Eimeria tenella. A scanning electron microscopic study . Zentralblatt für Bakteriologie, Mikrobiologie und Hygiene , A265 : 353 – 359 .
   Google Scholar
• Kaldhusdal , MI . (2000) . Necrotic enteritis as affected by dietary ingredients . World Poultry , 16 (6) : 42 – 43 .
   Google Scholar
• Kaldhusdal , M and Hofshagen , M . (1992) . Barley inclusion and avoparcin supplementation in broiler diets. 2. Clinical, pathological and bacteriological findings in a mild form of necrotic enteritis . Poultry Science , 71 : 1145 – 1153 .
   PubMed Web of Science ®Google Scholar
• Kaldhusdal , M and Skjerve , E . (1996) . Association between cereal contents in the diet and incidence of necrotic enteritis in broiler chickens in Norway . Preventive Veterinary Medicine , 28 : 1 – 16 .
   Web of Science ®Google Scholar
• Kaldhusdal , M , Evensen , Ø. and Landsverk , T . (1995) . Clostridium perfringens necrotizing enteritis of the fowl: a light microscopic, immunohistochemical and ultrastructural study of spontaneous disease . Avian Pathology , 24 : 421 – 433 .
   PubMed Web of Science ®Google Scholar
• Kaldhusdal , M , Schneitz , C , Hofshagen , M and Skjerve , E . (2001) . Reduced incidence of Clostridium perfringens-associated lesions and improved performance in broiler chickens treated with normal intestinal bacteria from adult fowl . Avian Diseases , 45 : 149 – 156 .
   PubMed Web of Science ®Google Scholar
• Kenny , M and Kemp , C . (2003) . The role of nutrition on the enteric health of broilers . Poultry International , 42 (13) : 24 – 32 .
   Google Scholar
• Kheysin YM (1972) Life Cycles of Coccidia of Domestic Animals London William Heinemann Medical Books
   Google Scholar
• Kimura , N , Mimura , F , Nishida , S , Kobayashi , A and Mitsuoka , T . (1976) . Studies on the relationship between intestinal flora and cecal coccidiosis in the chicken . Poultry Science , 55 : 1375 – 1383 .
   PubMed Web of Science ®Google Scholar
• Kmet V Stachová M Nemcová R Jonecová Z Lauková A (1993) The interaction of intestinal microflora with avian enteric pathogens Acta Veterinaria, Brno 62 (supplement 6) S87 S89
   Web of Science ®Google Scholar
• Knarreborg , A , Simon , MA , Engberg , RM , Jensen , BB and Tannock , GW . (2002) . Effects of dietary fat source and subtherapeutic levels of antibiotic on the bacterial community in the ileum of broiler chickens at various ages . Applied and Environmental Microbiology , 68 : 5918 – 5924 .
   PubMed Web of Science ®Google Scholar
• Kocher , A . (2003) . Nutritional manipulation of necrotic enteritis outbreak in broilers . Recent Advances in Animal Nutrition in Australia , 14 : 111 – 116 .
   Google Scholar
• Köhler , B . (2000) . Clostridium perfringens intoxication affects bird performance . World Poultry , 16 (5) : 57 – 59 .
   Google Scholar
• Köhler , B , Marx , G , Kölbach , S and Böttcher , E . (1974a) . Untersuchungen zur nekrotischen Enteritis der Hühner. 1. Mitt.: Diagnostik und Bekämpfung . Monatshefte für Veterinärmedizin , 29 : 380 – 384 .
   Google Scholar
• Köhler , B , Kölbach , S and Meine , J . (1974b) . Untersuchungen zur nekrotischen Enteritis der Hühner. 2. Mitt.: Mikrobiologische Aspekte . Monatshefte für Veterinärmedizin , 29 : 385 – 391 .
   Google Scholar
• Kouwenhoven , B and Horst , CJGvan der . (1969) . Strongly acid intestinal content and lowered protein, carotene and vitamin A blood levels in Eimeria acervulina infected chickens . Zeitschrift für Parasitenkunde , 32 : 347 – 353 .
   PubMed Web of Science ®Google Scholar
• Kouwenhoven , B and Horst , CJGvan der . (1972) . Disturbed intestinal absorption of vitamin A and carotenes and the effect of a low pH during Eimeria acervulina infection in the domestic fowl (Gallus domesticus) . Zeitschrift für Parasitenkunde , 38 : 152 – 161 .
   PubMed Web of Science ®Google Scholar
• Kucera J (1989) Differentiation of poultry coccidia in mixed infections In P. Yvoré (Ed.) Coccidia and Intestinal Coccidiomorphs pp. 125–128 Paris INRA
   Google Scholar
• Kucera , J . (1990) . Identification of Eimeria species in Czechoslovakia . Avian Pathology , 19 : 59 – 66 .
   PubMed Web of Science ®Google Scholar
• Kucera , J . (1991) . Enzyme variants of Eimeria parasitizing the domestic fowl and possibilities of species diagnostics . Folia Parasitologica , 38 : 193 – 199 .
   PubMed Web of Science ®Google Scholar
• Langhout , DJ . (1999) . The role of nutrition on coccidial infections . World Poultry, Special Supplement Coccidiosis , 3 : 33 – 34 .
   Google Scholar
• La Ragione , RM and Woodward , MJ . (2003) . Competitive exclusion by Bacillus subtilis spores of Salmonella enterica serotype Enteritidis and Clostridium perfringens in young chicks . Veterinary Microbiology , 94 : 245 – 256 .
   PubMed Web of Science ®Google Scholar
• Lev , M and Forbes , M . (1959) . Growth response to dietary penicillin of germ free chicks and of chicks with a defined intestinal flora . British Journal of Nutrition , 13 : 78 – 84 .
   PubMed Web of Science ®Google Scholar
• Levine ND (1961) Protozoan Parasites of Domestic Animals and Man Minneapolis Burgess Publishing Company
   Google Scholar
• Lew , AE , Anderson , GR , Minchin , CM , Jeston , PJ and Jorgensen , WK . (2003) . Inter- and infra-strain variation and PCR detection of the internal transcribed spacer (ITS-1) sequences of Australian isolates of Eimeria species from chickens . Veterinary Parasitology , 112 : 33 – 50 .
   PubMed Web of Science ®Google Scholar
• Li , GQ , Kanu , S , Xiang , FY , Xiao , SM , Zhang , L , Chen , HW and Ye , HJ . (2004) . Isolation and selection of ionophore tolerant Eimeria precocious lines: E. tenella, E. maxima and E. acervulina . Veterinary Parasitology , 119 : 261 – 276 .
   PubMed Web of Science ®Google Scholar
• Li , GQ , Kanu , S , Xiao , SM and Xiang , FY . (2005) . Responses of chickens vaccinated with a live attenuated multi-valent ionophore-tolerant Eimeria vaccine . Veterinary Parasitology , 129 : 178 – 186 .
   Web of Science ®Google Scholar
• Lillehoj , HS . (1988) . Influence of inoculation dose, inoculation schedule, chicken age, and host genetics on disease susceptibility and development of resistance to Eimeria tenella infection . Avian Diseases , 32 : 437 – 444 .
   PubMed Web of Science ®Google Scholar
• Lillehoj , HS and Trout , JM . (1996) . Avian gut-associated lymphoid tissues and intestinal immune responses to Eimeria parasites . Clinical Microbiology Reviews , 9 : 349 – 360 .
   PubMed Web of Science ®Google Scholar
• Lillehoj HS Allen PC Ruff MD (1986) Comparative studies of humoral and cellular immune responses in two inbred strains of chickens showing different susceptibilities to coccidiosis In L.R. McDougald, L.P. Joyner & P.L. Long (Eds.) Research in Avian Coccidiosis pp. 470–481 Athens University of Georgia
   Google Scholar
• Lillehoj , HS , Dalloul , RA and Min , W . (2003) . Enhancing intestinal immunity to coccidiosis . World Poultry, Special Supplement Coccidiosis , 4 : 18 – 21 .
   Google Scholar
• Liu C-M (1982) Microbial aspects of polyether antibiotics: activity, production, and biosynthesis In J.W. Westley (Ed.) Polyether Antibiotics, Naturally Occurring Acid Ionophores Vol. 1 Biology (pp. 43–102) New York Marcel Dekker
   Google Scholar
• Logan , MA , Tytell , AA , Danielson , IS and Griner , AM . (1945) . Production of Clostridium perfringens alpha toxin . Journal of Immunology , 51 : 317 – 328 .
   PubMed Web of Science ®Google Scholar
• Long , JR . (1973) . Necrotic enteritis in broiler chickens. I. A review of the literature and the prevalence of the disease in Ontario . Canadian Journal of Comparative Medicine , 37 : 302 – 308 .
   PubMedGoogle Scholar
• Long , JR and Truscott , RB . (1976) . Necrotic enteritis in broiler chickens. III. Reproduction of the disease . Canadian Journal of Comparative Medicine , 40 : 53 – 59 .
   PubMedGoogle Scholar
• Long , JR , Pettit , JR and Barnum , DA . (1974) . Necrotic enteritis in broiler chickens. II. Pathology and proposed pathogenesis . Canadian Journal of Comparative Medicine , 38 : 467 – 474 .
   PubMedGoogle Scholar
• Long , PL . (1968) . The effect of breed of chickens on resistance to Eimeria sp. infections . British Poultry Science , 9 : 71 – 78 .
   PubMed Web of Science ®Google Scholar
• Long PL (1973) Pathology and pathogenicity of coccidial infections In D.M. Hammond & P.L. Long (Eds.) The Coccidia: Eimeria, Isospora, Toxoplasma, and Related Genera pp. 253–294 Baltimore MD University Park Press
   Google Scholar
• Long PL (Ed.) (1982) The Biology of the Coccidia London Edward Arnold
   Google Scholar
• Long PL (Ed.) (1990) Coccidiosis of Man and Domestic Animals Boca Raton FL CRC Press
   Google Scholar
• Long , PL and Reid , WM . (1982) . A guide for the diagnosis of coccidiosis in chickens . University of Georgia College of Agriculture Research Report , 404 : 1 – 17 .
   Google Scholar
• Long , PL , Joyner , LP , Millard , BJ and Norton , CC . (1976) . A guide to laboratory techniques used in the study and diagnosis of avian coccidiosis . Folia Veterinaria Latina , 6 : 201 – 217 .
   PubMedGoogle Scholar
• Løvland , A and Kaldhusdal , M . (2001) . Severely impaired production performance in broiler flocks with high incidence of Clostridium perfringens-associated hepatitis . Avian Pathology , 30 : 73 – 81 .
   PubMed Web of Science ®Google Scholar
• Løvland , A , Kaldhusdal , M , Redhead , K , Skjerve , E and Lillehaug , A . (2004) . Maternal vaccination against subclinical necrotic enteritis in broilers . Avian Pathology , 33 : 81 – 90 .
   Web of Science ®Google Scholar
• Major , JR and Ruff , MD . (1978a) . Disaccharidase activity in the intestinal tissue of broilers infected with coccidia . Journal of Parasitology , 64 : 706 – 711 .
   PubMed Web of Science ®Google Scholar
• Major , JR and Ruff , MD . (1978b) . Eimeria spp.: influence of coccidia on digestion (amylolytic activity) in broiler chickens . Experimental Parasitology , 45 : 234 – 240 .
   PubMed Web of Science ®Google Scholar
• Mandal , AK . (1980) . Coccidia and coccidiosis of poultry and farm animals of India . Zoological Survey of India, Technical Monograph , 5 : 1 – 87 .
   Google Scholar
• Marchaim , U and Kulka , RG . (1967) . The non-parallel increase of amylase chymotrypsinogen and procarboxypeptidase in the developing chick pancreas . Biochimica et Biophysica Acta , 146 : 553 – 559 .
   PubMed Web of Science ®Google Scholar
• Marshall , RN , Taylor , MA , Green , JA and Catchpole , J . (1995) . The pathogenic effects of a UK field isolate of Eimeria tenella in modern broiler and layer chickens . Journal of Protozoology Research , 5 : 66 – 76 .
   Web of Science ®Google Scholar
• Martel , A , Devriese , LA , Cauwerts , K , De Gussem , K , Decostere , A and Haesebrouck , F . (2004) . Susceptibility of Clostridium perfringens strains from broiler chickens to antibiotics and anticoccidials . Avian Pathology , 33 : 3 – 7 .
   PubMed Web of Science ®Google Scholar
• Mathis , GF . (2003) . Vaccine can decrease anticoccidial resistance . World Poultry, Special Supplement Coccidiosis , 4 : 22 – 23 .
   Google Scholar
• Mathis GF McDougald LR (1989) Restoration of drug sensitivity on turkey farms after introduction of sensitive coccidia during controlled-exposure immunization In P. Yvoré (Ed.) Coccidia and Intestinal Coccidiomorphs pp. 339–343 Paris INRA
   Google Scholar
• Maxey , BW and Page , RK . (1977) . Efficacy of lincomycin feed medication for the control of necrotic enteritis in broiler-type chickens . Poultry Science , 56 : 1909 – 1913 .
   PubMed Web of Science ®Google Scholar
• McDougald LR (1982) Chemotherapy of coccidiosis In P.L. Long (Ed.) The Biology of the Coccidia pp. 373–427 London Edward Arnold
   Google Scholar
• McDougald LR (1990) Control of coccidiosis: chemotherapy In P.L. Long (Ed.) Coccidiosis of Man and Domestic Animals pp. 307–320 Boca Raton FL CRC Press
   Google Scholar
• McDougald LR (1993) Chemotherapy of coccidiosis In Proceedings of the VIth International Coccidiosis Conference pp. 45–47 Guelph Canada
   Google Scholar
• McDougald LR (2003) Coccidiosis In Y.M. Saif, H.J. Barnes, J.R. Glisson, A.M. Fadly, L.R. McDougald & D.E. Swayne (Eds.) Diseases of Poultry 11th edn pp. 974–991 Ames Iowa State Press
   Google Scholar
• McDougald , LR , Karlsson , T and Reid , WM . (1980) . Interaction of infectious bursal disease and coccidiosis in layer replacement chickens . Avian Diseases , 24 : 999 – 1005 .
   Google Scholar
• McDougald , LR , Fuller , L and Mattiello , R . (1997) . A survey of coccidia on 43 poultry farms in Argentina . Avian Diseases , 41 : 923 – 929 .
   PubMed Web of Science ®Google Scholar
• McKenzie , ME , Colnago , GL , Lee , S and Long , PL . (1982) . Gut stasis induction by coccidiosis infections in chickens . Poultry Science , 61 : 1512
   Web of Science ®Google Scholar
• McLoughlin , DK . (1970) . Coccidiosis: experimental analysis of drug resistance . Experimental Parasitology , 28 : 129 – 136 .
   PubMed Web of Science ®Google Scholar
• Mead , GC and Adams , BW . (1975) . Some observations on the caecal microflora of the chick during the first two weeks of life . British Poultry Science , 16 : 169 – 176 .
   PubMed Web of Science ®Google Scholar
• Michael , E and Hodges , RD . (1971) . The pathogenic effects of Eimeria acervulina: a comparison of single and repeated infections . Veterinary Record , 89 : 329 – 333 .
   PubMed Web of Science ®Google Scholar
• Michael , E and Hodges , RD . (1972) . The pathogenic effects of Eimeria necatrix: a comparison of single and repeated infections . Veterinary Record , 91 : 958 – 962 .
   Web of Science ®Google Scholar
• Miller CR (1983) Necrotic enteritis control with virginiamycin In Proceedings of the 32nd Western Poultry Disease Conference pp. 67–68 Davis CA USA
   Google Scholar
• Mitsch , P , Zitterl-Eglseer , K , Köhler , B , Gabler , C , Losa , R and Zimpernik , I . (2004) . The effect of two different blends of essential oil components on the proliferation of Clostridium perfringens in the intestines of broiler chickens . Poultry Science , 83 : 669 – 675 .
   PubMed Web of Science ®Google Scholar
• Morgan , A and Catchpole , J . (1996) . Do feed enzymes affect avian coccidial pathogenicity? . World Poultry, Special Supplement Coccidiosis , 2 : 38 – 39 .
   Google Scholar
• Motha , MXJ and Egerton , JR . (1984) . Influence of reticuloendotheliosis on the severity of Eimeria tenella infection in broiler chickens . Veterinary Microbiology , 9 : 121 – 129 .
   PubMed Web of Science ®Google Scholar
• Muhammed , SI , Morrison , SM and Boyd , WL . (1975) . Nutritional requirements for growth and sporulation of Clostridium perfringens . Journal of Applied Bacteriology , 3 : 245 – 253 .
   Google Scholar
• Nairn , ME and Bamford , VW . (1967) . Necrotic enteritis of broiler chickens in Western Australia . Australian Veterinary Journal , 43 : 49 – 54 .
   PubMedGoogle Scholar
• Nakamura , M , Cook , J and Cross , W . (1978) . Lecithinase production by Clostridium perfringens in chemically defined media . Applied Microbiology , 16 : 1420 – 1421 .
   Google Scholar
• National Research Council US (1984) Nutrient Requirements of Poultry 8th edn Washington DC National Academy Press
   Google Scholar
• Norton RA Hoerr FJ (1999) Clostridial diseases of poultry Poultry Digest, August/September 14 20
   Google Scholar
• Noy , Y and Sklan , D . (1998) . Yolk utilisation in the newly hatched poult . British Poultry Science , 39 : 446 – 451 .
   PubMed Web of Science ®Google Scholar
• Noy , Y and Sklan , D . (1999) . Energy utilization in newly hatched chicks . Poultry Science , 78 : 1750 – 1756 .
   PubMed Web of Science ®Google Scholar
• Ohe , O and Arakawa , A . (1975) . Effect of feed additive antibiotics on chickens infected with Eimeria tenella . Poultry Science , 54 : 1008 – 1018 .
   PubMed Web of Science ®Google Scholar
• Okoye , JOA . (1985) . Cases of intestinal intussusception in young fowls . Avian Pathology , 14 : 275 – 279 .
   PubMed Web of Science ®Google Scholar
• Oliveira Cde (2001) Latest thinking on avian coccidiosis In Vaccination at Work in Commercial Broilers Part 2 (p. 9) Driffield UK Positive Action Publications
   Google Scholar
• Parish , WE . (1961a) . Necrotic enteritis in the fowl (Gallus gallus domesticus). I. Histopathology of the disease and isolation of a strain of Clostridium welchii . Journal of Comparative Pathology , 71 : 377 – 393 .
   PubMed Web of Science ®Google Scholar
• Parish , WE . (1961b) . Necrotic enteritis in the fowl. II. Examination of the causal Clostridium welchii . Journal of Comparative Pathology , 71 : 394 – 404 .
   PubMed Web of Science ®Google Scholar
• Parish , WE . (1961c) . Necrotic enteritis in the fowl. III. The experimental disease . Journal of Comparative Pathology , 71 : 405 – 413 .
   PubMed Web of Science ®Google Scholar
• Patterson , DSP , Joyner , LP , Berrett , S , Boarer , CDH , Cheong , FH and Norton , CC . (1975) . In-vitro studies on intestinal malabsorption of amino-acids in young chicks infected with Eimeria acervulina . Avian Pathology , 4 : 11 – 16 .
   PubMedGoogle Scholar
• Patterson , LT , Johnson , LW and Edgar , SA . (1961) . The comparative resistance of several inbred lines of S.C. White Leghorns to certain infectious diseases . Poultry Science , 40 : 1442
   Google Scholar
• Pattison M (2000) Cost of coccidiosis In Proceedings of Coccidiosis Conference (7th International Poultry Health Conference) Hannover, Germany (17 pp., unpaginated) Driffield UK Positive Action Publications
   Google Scholar
• Pedersen , K , Kaldhusdal , M , Engström , B , Engberg , RM , Løvland , A , Nauerby , B and Bjerrum , L . (2004) . Clostridium perfringens: en lurende ræv i hønsegården? . Dansk Veterinærtidsskrift , 87 (11) : 18 – 22 .
   Google Scholar
• Pellérdy LP (1974) Coccidia and Coccidiosis 2nd edn Berlin Verlag Paul Parey
   Google Scholar
• Pesti , GM and Combs , GF . (1976) . Studies on the enteric absorption of selenium in the chick using localized coccidial infections . Poultry Science , 55 : 2265 – 2274 .
   PubMed Web of Science ®Google Scholar
• Petersen CB (1997) Practical application of whole grain feeding In Proceedings of the Eleventh European Symposium on Poultry Nutrition pp. 6–15 Faaborg Denmark
   Google Scholar
• Pettersson , D . (1987) . Substitution of maize with different levels of wheat, triticale or rye in diets for broiler chickens . Swedish Journal of Agricultural Research , 17 : 57 – 62 .
   Google Scholar
• Phillips , ND , La , T , Pluske , JR and Hampson , DJ . (2004) . A wheat-based diet enhances colonization with the intestinal spirochaete Brachyspira intermedia in experimentally infected laying hens . Avian Pathology , 33 : 451 – 457 .
   PubMed Web of Science ®Google Scholar
• Pout , DD . (1967) . Villous atrophy and coccidiosis . Nature, London , 213 : 306 – 307 .
   PubMed Web of Science ®Google Scholar
• Pout DD (1968) The reaction of the small intestine of the chicken to infection with Eimeria spp In E.J.L. Soulsby (Ed.) The Reaction of the Host to Parasitism. Supplement to Veterinary Medical Review pp. 28–38 Marburg-Lahn N.G. Elwert Universitäts-und Verlagsbuchhandlung
   Google Scholar
• Prescott , JF . (1979) . The prevention of experimentally induced necrotic enteritis in chickens by avoparcin . Avian Diseases , 23 : 1072 – 1074 .
   PubMed Web of Science ®Google Scholar
• Preston-Mafham , RA and Sykes , AH . (1967a) . Factors contributing to the weight loss during intestinal coccidiosis infections in the fowl . Proceedings of the Nutrition Society , 26 : 27 – 28 .
   PubMed Web of Science ®Google Scholar
• Preston-Mafham , RA and Sykes , AH . (1967b) . Changes in permeability of the mucosa during intestinal coccidiosis infections in the fowl . Experientia , 23 : 972 – 973 .
   PubMedGoogle Scholar
• Preston-Mafham , RA and Sykes , AH . (1970) . Changes in body weight and intestinal absorption during infections with Eimeria acervulina in the chicken . Parasitology , 61 : 417 – 424 .
   PubMed Web of Science ®Google Scholar
• Quiroz , MA . (2003) . Use of vaccines to prevent avian coccidiosis in broilers . International Poultry Production , 11 (8) : 7 – 11 .
   Google Scholar
• Rada , V , Rychlý , I and Voríšek , K . (1994) . Susceptibility of chicken intestinal lactobacilli to coccidiostats . Acta Veterinaria, Brno , 63 : 9 – 12 .
   Web of Science ®Google Scholar
• Reid WM (1989) Recommending sanitary practices for coccidiosis control In P. Yvoré (Ed.) Coccidia and Intestinal Coccidiomorphs pp. 371–376 Paris INRA
   Google Scholar
• Reid , WM and Pitois , M . (1965) . The influence of coccidiosis on feed and water intake of chickens . Avian Diseases , 9 : 343 – 348 .
   PubMed Web of Science ®Google Scholar
• Répérant , J-M and Humbert , F . (2002) . Interactions between Clostridium perfringens and Eimeria meleagrimitis on the development of clostridia in turkeys: experimental study . Turkeys , 50 : 53 – 54 .
   Google Scholar
• Rice , JT and Reid , WM . (1973) . Coccidiosis immunity following early and late exposure to Marek's disease . Avian Diseases , 17 : 66 – 71 .
   PubMed Web of Science ®Google Scholar
• Riddell C (1987) Avian Histopathology Pennsylvania PA American Association of Avian Pathologists
   Google Scholar
• Riddell , C and Kong , XM . (1992) . The influence of diet on necrotic enteritis in broiler chickens . Avian Diseases , 36 : 499 – 503 .
   PubMed Web of Science ®Google Scholar
• Rose , ME and Long , PL . (1969) . Immunity to coccidiosis: gut permeability changes in response to sporozoite invasion . Experientia , 25 : 183 – 184 .
   PubMedGoogle Scholar
• Ross Breeders (1995) Coccidiosis Control in Broiler Breeders Newbridge Ross Breeders
   Google Scholar
• Ross Breeders . (1999) . Necrotic enteritis and associated conditions in broiler chickens . World Poultry , 15 (8) : 44 – 47 .
   Google Scholar
• Ruff , MD . (1974) . Reduced transport of methionine in intestines of chickens infected with Eimeria necatrix . Journal of Parasitology , 60 : 838 – 843 .
   PubMed Web of Science ®Google Scholar
• Ruff MD (1978) Malabsorption from the intestine of birds with coccidiosis In P.L. Long, K.N. Boorman & B.M. Freeman (Eds.) Avian Coccidiosis pp. 281–295 Edinburgh British Poultry Science
   Google Scholar
• Ruff MD (1986) Reasons for inadequate nutrient utilization during avian coccidiosis: a review In L.R. McDougald, L.P. Joyner & P.L. Long (Eds.) Research in Avian Coccidiosis pp. 169–185 Athens University of Georgia
   Google Scholar
• Ruff MD (1989) Interaction of avian coccidiosis with other diseases: a review In P. Yvoré (Ed.) Coccidia and Intestinal Coccidiomorphs pp. 173–181 Paris INRA
   Google Scholar
• Ruff , MD and Edgar , SA . (1982) . Reduced intestinal absorption in broilers during Eimeria mitis infection . American Journal of Veterinary Research , 43 : 507 – 509 .
   PubMed Web of Science ®Google Scholar
• Ruff , MD and Fuller , HL . (1975) . Some mechanisms of reduction of carotenoid levels in chickens infected with Eimeria acervulina or E. tenella . Journal of Nutrition , 105 : 1447 – 1456 .
   PubMed Web of Science ®Google Scholar
• Ruff , MD and Reid , WM . (1975) . Coccidiosis and intestinal pH in chickens . Avian Diseases , 19 : 52 – 58 .
   PubMed Web of Science ®Google Scholar
• Ruff , MD and Rosenberger , JK . (1985a) . Concurrent infections with reoviruses and coccidia in broilers . Avian Diseases , 29 : 465 – 478 .
   PubMed Web of Science ®Google Scholar
• Ruff , MD and Rosenberger , JK . (1985b) . Interaction of low-pathogenicity reoviruses and low levels of infection with several coccidial species . Avian Diseases , 29 : 1057 – 1065 .
   PubMed Web of Science ®Google Scholar
• Ruff , MD , Johnson , JK , Dykstra , DD and Reid , WM . (1974) . Effects of Eimeria acervulina on intestinal pH in conventional and gnotobiotic chickens . Avian Diseases , 18 : 96 – 104 .
   PubMed Web of Science ®Google Scholar
• Ruff , MD , Whitlock , DR and Smith , RR . (1976) . Eimeria acervulina and E. tenella: effect on methionine absorption by the avian intestine . Experimental Parasitology , 39 : 244 – 251 .
   PubMed Web of Science ®Google Scholar
• Russell , AD . (1990) . Bacterial spores and chemical sporicidal agents . Clinical Microbiology Reviews , 3 : 99 – 119 .
   PubMed Web of Science ®Google Scholar
• Ryley , JF . (1980) . Drug resistance in coccidia . Advances in Veterinary Science and Comparative Medicine , 24 : 99 – 120 .
   PubMedGoogle Scholar
• Ryley , JF and Betts , MJ . (1973) . Chemotherapy of chicken coccidiosis . Advances in Pharmacology and Chemotherapy , 11 : 221 – 293 .
   PubMedGoogle Scholar
• Sasaki , J , Goryo , M , Makara , M , Nakamura , K and Okada , K . (2003) . Necrotic hepatitis due to Clostridium perfringens infection in newly hatched broiler chicks . Journal of Veterinary Medical Science , 65 : 1249 – 1251 .
   PubMed Web of Science ®Google Scholar
• Schalm OW Jain NC Carroll EJ (1975) Veterinary Hematology 3rd edn Philadelphia PA Lea and Febiger
   Google Scholar
• Schetters , TPM , Janssen , HAJM and Vermeulen , AN . (1999) . A new vaccination concept against coccidiosis in poultry . World Poultry, Special Supplement Coccidiosis , 3 : 26 – 27 .
   Google Scholar
• Schildt , CS and Herrick , CA . (1955) . The effect of cecal coccidiosis on the motility of the digestive tract of the domestic fowl . Journal of Parasitology , 41 ( supplement ) : 18 – 19 .
   PubMed Web of Science ®Google Scholar
• Schuring , M and Gils , Bvan . (2001) . Clostridium perfringens — a nutritional challenge? . Feed Mix , 9 (1) : 26 – 28 .
   Google Scholar
• Semenza , G . (1986) . Anchoring and biosynthesis of stalked brush border membrane proteins: glycosidases and peptidases of enterocytes and renal tubuli . Annual Review of Cell Biology , 2 : 255 – 313 .
   PubMedGoogle Scholar
• Shane , SM . (2004a) . Clostridial diseases limit production efficiency in antibiotic-free broiler flocks . Poultry International , 43 (1) : 12 – 13 .
   Google Scholar
• Shane , SM . (2004b) . Update on the poultry disease situation in the USA . Poultry International , 43 (2) : 10 – 15 .
   Google Scholar
• Shane , SM , Koetting , DG and Harrington , KS . (1984) . The occurrence of Clostridium perfringens in the intestine of chicks . Avian Diseases , 28 : 1120 – 1124 .
   PubMed Web of Science ®Google Scholar
• Shane , SM , Gyimah , JE , Harrington , KS and Snider , TG . (1985) . Etiology and pathogenesis of necrotic enteritis . Veterinary Research Communications , 9 : 269 – 287 .
   PubMed Web of Science ®Google Scholar
• Shapiro D (2000) Coccidiosis control in replacement layers and breeders In Proceedings of Coccidiosis Conference (7th International Poultry Health Conference) Hannover, Germany (8 pp., unpaginated) Driffield UK Positive Action Publications
   Google Scholar
• Sharma , VD and Fernando , MA . (1975) . Effect of Eimeria acervulina infection on nutrient retention with special reference to fat malabsorption in chickens . Canadian Journal of Comparative Medicine , 39 : 146 – 154 .
   PubMedGoogle Scholar
• Sharma , VD , Fernando , MA and Summers , JD . (1973) . The effect of dietary crude protein level on intestinal and cecal coccidiosis in chickens . Canadian Journal of Comparative Medicine , 37 : 195 – 199 .
   PubMedGoogle Scholar
• Shirley MW (1986) New methods for the identification of species and strains of Eimeria In L.R. McDougald, L.P. Joyner & P.L. Long (Eds.) Research in Avian Coccidiosis pp. 13–35 Athens University of Georgia
   Google Scholar
• Shirley , MW . (2003) . The importance of E. mitis is underestimated . World Poultry, Special Supplement Coccidiosis , 4 : 6 – 7 .
   Google Scholar
• Shirley , MW and Bedrník , P . (1997) . Live attenuated vaccines against avian coccidiosis: success with precocious and egg-adapted lines of Eimeria . Parasitology Today , 13 : 481 – 484 .
   PubMedGoogle Scholar
• Silversides , FG and Remus , J . (1999) . Betaine improves performance of coccidia-challenged birds . World Poultry, Special Supplement Coccidiosis , 3 : 37 – 38 .
   Google Scholar
• Singh , SP and Donovan , GA . (1973) . A relationship between coccidiosis and dietary vitamin A levels in chickens . Poultry Science , 52 : 1295 – 1301 .
   PubMed Web of Science ®Google Scholar
• Sklan , D . (2001) . Development of the digestive tract of poultry . World's Poultry Science Journal , 57 : 415 – 428 .
   Web of Science ®Google Scholar
• Sklan D (2004) Early gut development: the interaction between feed, gut health and immunity In L.A. Tucker & J.A. Taylor-Pickard (Eds.) Interfacing Immunity, Gut Health and Performance pp. 9–31 Nottingham Nottingham University Press
   Google Scholar
• Smith , AL , Hesketh , P , Archer , A and Shirley , MW . (2002) . Antigenic diversity in Eimeria maxima and the influence of host genetics and immunization schedule on cross-protective immunity . Infection and Immunity , 70 : 2472 – 2479 .
   PubMed Web of Science ®Google Scholar
• Smith , HW . (1959) . The effect of the continuous administration of diets containing tetracyclines and penicillin on the number of drug-resistant and drug-sensitive Clostridium welchii in the faeces of pigs and chickens . Journal of Pathology and Bacteriology , 77 : 79 – 93 .
   PubMedGoogle Scholar
• Smith , HW . (1965) . The development of the flora of the alimentary tract in young animals . Journal of Pathology and Bacteriology , 90 : 495 – 513 .
   PubMedGoogle Scholar
• Soares , R , Cosstick , T and Lee , EH . (2004) . Control of coccidiosis in caged egg layers: a paper plate vaccination method . Journal of Applied Poultry Research , 13 : 360 – 363 .
   Web of Science ®Google Scholar
• Songer , JG . (1996) . Clostridial enteric diseases of domestic animals . Clinical Microbiology Reviews , 9 : 216 – 234 .
   PubMed Web of Science ®Google Scholar
• Stephens , CP and Hampson , DJ . (2002) . Evaluation of tiamulin and lincomycin for the treatment of broiler breeders experimentally infected with the spirochaete Brachyspira pilosicoli . Avian Pathology , 31 : 299 – 304 .
   PubMed Web of Science ®Google Scholar
• Stephens , JF , Borst , WJ and Barnett , BD . (1974) . Some physiological effects of Eimeria acervulina, E. brunetti, and E. mivati infections in young chickens . Poultry Science , 53 : 1735 – 1742 .
   PubMed Web of Science ®Google Scholar
• Stutz , MW and Lawton , GC . (1984) . Effects of diet and antimicrobials on growth, feed efficiency, intestinal Clostridium perfringens, and ileal weight of broiler chicks . Poultry Science , 63 : 2036 – 2042 .
   PubMed Web of Science ®Google Scholar
• Stutz , MW , Johnson , SL and Judith , FR . (1983) . Effects of diet and bacitracin on growth, feed efficiency, and populations of Clostridium perfringens in the intestine of broiler chicks . Poultry Science , 62 : 1619 – 1625 .
   PubMed Web of Science ®Google Scholar
• Takeda , T , Fukata , T , Miyamoto , T , Sasai , K , Baba , E and Arakawa , A . (1995) . The effects of dietary lactose and rye on caecal colonisation of Clostridium perfringens in chicks . Avian Diseases , 39 : 375 – 381 .
   PubMed Web of Science ®Google Scholar
• Takhar , BS and Farrell , DJ . (1979) . Energy and nitrogen metabolism of chickens infected with either Eimeria acervulina or Eimeria tenella . British Poultry Science , 20 : 197 – 211 .
   PubMed Web of Science ®Google Scholar
• Taylor , AW and Stewart , J . (1941) . The toxins produced by Clostridium welchii in a simple medium . Journal of Pathology and Bacteriology , 53 : 87 – 94 .
   Google Scholar
• Taylor , MW and Russell , WC . (1947) . The provitamin A requirement of growing chickens . Poultry Science , 26 : 234 – 242 .
   Web of Science ®Google Scholar
• Thebo , P , Lundén , A , Uggla , A and Hooshmand-Rad , P . (1998) . Identification of seven Eimeria species in Swedish domestic fowl . Avian Pathology , 27 : 613 – 617 .
   PubMed Web of Science ®Google Scholar
• Timms , L . (1968) . Observations on the bacterial flora of the alimentary tract in three age groups of normal chickens . British Veterinary Journal , 124 : 470 – 476 .
   PubMedGoogle Scholar
• Truscott , RB and Al-Sheikhly , F . (1977) . Reproduction and treatment of necrotic enteritis in broilers . American Journal of Veterinary Research , 38 : 857 – 861 .
   PubMed Web of Science ®Google Scholar
• Tsuji , N , Kawazu , S , Ohta , M , Kamio , T , Isobe , T , Shimura , K and Fujisaki , K . (1997) . Discrimination of eight chicken Eimeria species using the two-step polymerase chain reaction . Journal of Parasitology , 83 : 966 – 970 .
   PubMed Web of Science ®Google Scholar
• Turk , DE . (1972) . Protozoan parasitic infections of the chick intestine and protein digestion and absorption . Journal of Nutrition , 102 : 1217 – 1222 .
   PubMed Web of Science ®Google Scholar
• Turk , DE . (1973) . Calcium absorption during coccidial infections in chicks . Poultry Science , 52 : 854 – 857 .
   PubMed Web of Science ®Google Scholar
• Turk DE (1978) The effects of coccidiosis on intestinal function and gut microflora In P.L. Long, K.N. Boorman & B.M. Freeman (Eds.) Avian Coccidiosis pp. 227–267 Edinburgh British Poultry Science
   Google Scholar
• Turk , DE and Stephens , JF . (1966) . Effect of intestinal damage produced by Eimeria necatrix infection in chicks upon absorption of orally administered zinc-65 . Journal of Nutrition , 88 : 261 – 266 .
   PubMed Web of Science ®Google Scholar
• Turk , DE and Stephens , JF . (1967a) . Upper intestinal tract infection produced by E. acervulina and absorption of 65Zn and 1311I-labelled oleic acid . Journal of Nutrition , 93 : 161 – 165 .
   PubMed Web of Science ®Google Scholar
• Turk , DE and Stephens , JF . (1967b) . Eimeria necatrix infections and oleic acid absorption in broilers . Poultry Science , 46 : 775 – 777 .
   Web of Science ®Google Scholar
• Turk , DE and Stephens , JF . (1970) . Effects of serial inoculations with Eimeria acervulina or Eimeria necatrix upon zinc and oleic acid absorption in chicks . Poultry Science , 49 : 523 – 526 .
   PubMed Web of Science ®Google Scholar
• Tyczkowski , JK , Hamilton , PB and Ruff , MD . (1991) . Altered metabolism of carotenoids during pale-bird syndrome in chickens infected with Eimeria acervulina . Poultry Science , 70 : 2074 – 2081 .
   PubMed Web of Science ®Google Scholar
• Tyzzer , EE . (1929) . Coccidiosis in gallinaceous birds . American Journal of Hygiene , 10 : 269 – 383 .
   Google Scholar
• Tyzzer , EE . (1932) . Criteria and methods in the investigation of avian coccidiosis . Science, New York , 75 : 324 – 328 .
   Google Scholar
• Uni , Z , Ganot , S and Sklan , D . (1998) . Posthatch development of mucosal function in the broiler small intestine . Poultry Science , 77 : 75 – 82 .
   PubMed Web of Science ®Google Scholar
• Uni , Z , Noy , Y and Sklan , D . (1999) . Posthatch development of small intestinal function in the poult . Poultry Science , 78 : 215 – 222 .
   PubMed Web of Science ®Google Scholar
• Untawale , GG and McGinnis , J . (1979) . Effect of rye and levels of raw and autoclaved beans (Phaseolus vulgaris) on adhesion of microflora to the intestinal mucosa . Poultry Science , 58 : 928 – 933 .
   Web of Science ®Google Scholar
• Vahjen , W , Glaser , K , Schäfer , K and Simon , O . (1998) . Influence of xylanase-supplemented feed on the development of selected bacterial groups in the intestinal tract of broiler chicks . Journal of Agricultural Sciences , 130 : 489 – 500 .
   Web of Science ®Google Scholar
• van der Klis , JD and van Voorst , A . (1993) . The effect of carboxy methyl cellulose (a soluble polysaccharide) on the rate of marker excretion from the gastrointestinal tract of broilers . Poultry Science , 72 : 503 – 512 .
   Web of Science ®Google Scholar
• van der Sluis , W . (1996a) . Controlling coccidiosis by means of enzymes, a new concept? . World Poultry, Special Supplement Coccidiosis , 2 : 40
   Google Scholar
• van der Sluis , W . (1996b) . Litter quality and coccidiosis . World Poultry, Special Supplement Coccidiosis , 2 : 41
   Google Scholar
• van der Sluis , W . (1997) . Poultry diseases around the world . World Poultry , 13 (7) : 32 – 44 .
   Google Scholar
• van der Sluis , W . (2000a) . Clostridial enteritis — a syndrome emerging worldwide . World Poultry , 16 (5) : 56 – 57 .
   Google Scholar
• van der Sluis , W . (2000b) . Clostridial enteritis is an often underestimated problem . World Poultry , 16 (7) : 42 – 43 .
   Google Scholar
• van der Stroom , JH and van der Sluis , W . (1999) . The effect of intercurrent diseases on coccidiosis . World Poultry, Special Supplement Coccidiosis , 3 : 15 – 17 .
   Google Scholar
• Van Immerseel , F , De Buck , J , Pasmans , F , Huyghebaert , G , Haesebrouck , F and Ducatelle , R . (2004) . Clostridium perfringens in poultry: an emerging threat for animal and public health . Avian Pathology , 33 : 537 – 549 .
   PubMed Web of Science ®Google Scholar
• Vermeulen , AN , Schaap , DC and Schetters , TPM . (2001) . Control of coccidiosis in chickens by vaccination . Veterinary Parasitology , 100 : 13 – 20 .
   PubMed Web of Science ®Google Scholar
• Wages DP Opengart K (2003) Necrotic enteritis In Y.M. Saif, H.J. Barnes, J.R. Glisson, A.M. Fadly, L.R. McDougald & D.E. Swayne (Eds.) Diseases of Poultry 11th edn pp. 781–785 Ames Iowa State Press
   Google Scholar
• Waldenstedt , L . (1998) . Coccidial and clostridial infections in broiler chickens—influence of diet composition . Acta Universitatis Agriculturae Sueciae, Agraria , 88 : 1 – 61 .
   Google Scholar
• Waldenstedt , L . (2003) . Effect of vaccination against coccidiosis in combination with an antibacterial oregano (Oreganum vulgare) compound in organic broiler production . Acta Agriculturae Scandinavica (section A, Animal Sciences) , 53 : 101 – 109 .
   Web of Science ®Google Scholar
• Waldenstedt , L , Elwinger , K , Hooshmand-Rad , P , Thebo , P and Uggla , A . (1998) . Comparison between effects of standard feed and whole wheat supplemented diet on experimental Eimeria tenella and Eimeria maxima infections in broiler chickens . Acta Veterinaria Scandinavica , 39 : 461 – 471 .
   PubMed Web of Science ®Google Scholar
• Waldenstedt , L , Lundén , A , Elwinger , K , Thebo , P and Uggla , A . (1999) . Comparison between a live, attenuated anticoccidial vaccine and an anticoccidial ionophore, on performance of broilers raised with or without a growth promoter, in an initially Eimeria-free environment . Acta Veterinaria Scandinavica , 40 : 11 – 21 .
   PubMed Web of Science ®Google Scholar
• Waldenstedt , L , Elwinger , K , Lundén , A , Thebo , P , Bedford , MR and Uggla , A . (2000) . Intestinal digesta viscosity decreases during coccidial infection in broilers . British Poultry Science , 41 : 459 – 464 .
   PubMed Web of Science ®Google Scholar
• Waldenstedt , L , Elwinger , K , Lundén , A , Thebo , P and Uggla , A . (2001) . Sporulation of Eimeria maxima oocysts in litter with different moisture contents . Poultry Science , 80 : 1412 – 1415 .
   PubMed Web of Science ®Google Scholar
• Waldron , LA , Rose , SP and Kettlewell , PS . (1993) . Difference in productive performance of broiler chickens fed two wheat varieties . Aspects of Applied Biology , 36 : 485 – 489 .
   Google Scholar
• Wallach , M and Waldenstedt , L . (1999) . Immunity and the effects of removing coccidiostats from poultry feed . World Poultry, Special Supplement Coccidiosis , 3 : 12 – 15 .
   Google Scholar
• Wallach , M , Smith , NC , Petracca , M , Miller , CM , Eckert , J and Braun , R . (1995) . Eimeria maxima gametocyte antigens: potential use in a subunit maternal vaccine against coccidiosis in chickens . Vaccine , 13 : 347 – 354 .
   PubMed Web of Science ®Google Scholar
• Wang GT Davidson J (1992) Comparative efficacy of ionophore/growth promoter combinations for the control of necrotic enteritis in chickens In Proceedings XIX World's Poultry Congress 3 pp. 585–588 Amsterdam The Netherlands
   Google Scholar
• Watkins , KL , Shryock , TR , Dearth , RN and Saif , YM . (1997) . In-vitro antimicrobial susceptibility of Clostridium perfringens from commercial turkey and broiler chicken origin . Veterinary Microbiology , 54 : 195 – 200 .
   PubMed Web of Science ®Google Scholar
• Wicker , DL , Isgrigg , WN , Trammell , JH and Davis , RB . (1977) . The control and prevention of necrotic enteritis in broilers with zinc bacitracin . Poultry Science , 56 : 1229 – 1231 .
   PubMed Web of Science ®Google Scholar
• Wijewanta , EA and Seneviratna , P . (1971) . Bacteriological studies of fatal Clostridium perfringens type-A infection in chickens . Avian Diseases , 15 : 654 – 661 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (1986) . On the aetiology of intestinal intussusception in the fowl . Avian Pathology , 15 : 301 – 304 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (1992a) . Differences between the anticoccidial potencies of monensin in maize-based or wheat-based chicken diets . Veterinary Research Communications , 16 : 147 – 152 .
   PubMed Web of Science ®Google Scholar
• Williams RB (1992b) The Development, Efficacy and Epidemiological Aspects of Paracox, a New Coccidiosis Vaccine for Chickens Harefield UK Pitman-Moore Europe
   Google Scholar
• Williams , RB . (1994) . Safety of the attenuated anticoccidial vaccine Paracox in broiler chickens isolated from extraneous coccidial infection . Veterinary Research Communications , 18 : 189 – 198 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (1995) . Epidemiological studies of coccidiosis in the domesticated fowl (Gallus gallus): II. Physical condition and survival of Eimeria acervulina oocysts in poultry-house litter . Applied Parasitology , 36 : 90 – 96 .
   PubMedGoogle Scholar
• Williams RB (1996) The ratio of the water and food consumption of chickens and its significance in the chemotherapy of coccidiosis Veterinary Research Communications 20 437 447 [see also publisher's errata: Veterinary Research Communications, 21, 69]
   PubMed Web of Science ®Google Scholar
• Williams RB (1997a) Economic importance of Eimeria mitis, E. praecox and E. acervulina infections in chickens In Proceedings of the VIIth International Coccidiosis Conference p. 39 Oxford UK
   Google Scholar
• Williams , RB . (1997b) . Laboratory tests of phenolic disinfectants against the chicken coccidium Eimeria tenella . Veterinary Record , 141 : 447 – 448 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (1998) . Epidemiological aspects of the use of live anticoccidial vaccines for chickens . International Journal for Parasitology , 28 : 1089 – 1098 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (1999a) . A compartmentalised model for the estimation of the cost of coccidiosis to the world's chicken production industry . International Journal for Parasitology , 29 : 1209 – 1229 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (1999b) . Anticoccidial vaccines: the story so far . World Poultry, Special Supplement Coccidiosis , 3 : 23 – 25 .
   Google Scholar
• Williams , RB . (2001) . Quantification of the crowding effect during infections with the seven Eimeria species of the domesticated fowl: its importance for experimental designs and the production of oocyst stocks . International Journal for Parasitology , 31 : 1056 – 1069 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (2002a) . Anticoccidial vaccines for broiler chickens: pathways to success . Avian Pathology , 31 : 317 – 353 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (2002b) . Fifty years of anticoccidial vaccines for poultry (1952–2002) . Avian Diseases , 46 : 775 – 802 .
   PubMed Web of Science ®Google Scholar
• Williams , RB . (2003a) . Coccidial and clostridial interactions in broilers vaccinated against coccidiosis . World Poultry, Special Supplement Coccidiosis , 4 : 26 – 28 .
   Google Scholar
• Williams , RB . (2003b) . Optimizing anticoccidial vaccine efficacy in broilers . World Poultry, Special Supplement Coccidiosis , 4 : 29 – 31 .
   Google Scholar
• Williams , RB . (2003c) . Anticoccidial vaccines: looking back, looking forward . Zootecnica International , 25 (7/8) : 52, 54–57
   Google Scholar
• Williams , RB . (2003d) . Anticoccidial vaccination: the absence or reduction of numbers of endogenous parasites from gross lesions in immune chickens after virulent coccidial challenge . Avian Pathology , 32 : 535 – 543 .
   PubMed Web of Science ®Google Scholar
• Williams , RB and Andrews , SJ . (2001) . The origins and biological significance of the coccidial lesions that occur in chickens vaccinated with a live attenuated anticoccidial vaccine . Avian Pathology , 30 : 215 – 220 .
   PubMed Web of Science ®Google Scholar
• Williams , RB and Catchpole , J . (2000) . A new protocol for a challenge test to assess the efficacy of live anticoccidial vaccines for chickens . Vaccine , 18 : 1178 – 1185 .
   PubMed Web of Science ®Google Scholar
• Williams , RB and Gobbi , L . (2002) . Comparison of an attenuated anticoccidial vaccine and an anticoccidial drug programme in commercial broiler chickens in Italy . Avian Pathology , 31 : 253 – 265 .
   PubMed Web of Science ®Google Scholar
• Williams , RB , Bushell , AC , Répérant , J-M , Doy , TG , Morgan , JH , Shirley , MW , Yvoré , P , Carr , MM and Frémont , Y . (1996) . A survey of Eimeria species in commercially-reared chickens in France during 1994 . Avian Pathology , 25 : 113 – 130 .
   PubMed Web of Science ®Google Scholar
• Williams , RB , Carlyle , WWH , Bond , DR and Brown , IAG . (1999) . The efficacy and economic benefits of Paracox, a live attenuated anticoccidial vaccine, in commercial trials with standard broiler chickens in the United Kingdom . International Journal for Parasitology , 29 : 341 – 355 .
   PubMed Web of Science ®Google Scholar
• Williams , RB , Marshall , RN , La Ragione , RM and Catchpole , C . (2003) . A new method for the experimental production of necrotic enteritis and its use for studies on the relationships between necrotic enteritis, coccidiosis and anticoccidial vaccination of chickens . Parasitology Research , 90 : 19 – 26 .
   PubMed Web of Science ®Google Scholar
• Yvoré P (1986) Physiology of the host response to coccidial infections In L.R. McDougald, L.P. Joyner & P.L. Long (Eds.) Research in Avian Coccidiosis pp. 148–168 Athens University of Georgia
   Google Scholar
• Yvoré , P and Mainguy , P . (1972) . Influence de la coccidiose duodenale sur la tenur en carotenoids du serum chez le poulet . Annales de Recherches Vétérinaires , 3 : 381 – 387 .
   Google Scholar
• Yvoré , P , Dubois , M , Sauveur , B and Aycardi , J . (1972) . Pathogénie de la coccidiose duodénale à Eimeria acervulina . Annales de Recherches Vétérinaires , 3 : 61 – 82 .
   Google Scholar
• Yvoré , P , Pery , P , Laurent , F and Bessay , M . (1993) . Vaccins anticoccidiens. Bilan et perspectives . Veterinary Research , 24 : 229 – 250 .
   PubMed Web of Science ®Google Scholar