A survey of the economic impact of subclinical Eimeria infections in broiler chickens in Norway

References

• Al Natour , M.Q. , Suleiman , M.M. and Abo-Shehada , M.N. 2002 . Flock-level prevalence of Eimeria species among broiler chicks in northern Jordan . Preventive Veterinary Medicine , 53 : 305 – 310 .
   PubMed Web of Science ®Google Scholar
• Bedrník , P. , Jurkovic , P. , Kucera , J. and Firmanova , A. 1989 . Cross resistance to the ionophorous polyether anticoccidial drugs in Eimeria tenella isolates from Czechoslovakia . Poultry Science , 68 : 89 – 93 .
   PubMed Web of Science ®Google Scholar
• Brackett , S. and Bliznick , A. 1952 . The reproductive potential of five species of coccidia of the chicken as demonstrated by oocyst production . Journal of Parasitology , 38 : 133 – 139 .
   PubMed Web of Science ®Google Scholar
• Braunius , W.W. 1980 . Clinical aspects, detection methods and the damage caused by coccidiosis in broilers . Archiv für Geflügelkunde , 44 : 99 – 104 .
   Web of Science ®Google Scholar
• Braunius , W.W. 1986 . “ Incidence of Eimeria species in broilers in relation to the use of anticoccidial drugs ” . In Research in Avian Coccidiosis, Proceedings of the Georgia Coccidiosis Conference , Edited by: McDougald , L.R. , Joyner , L.P. and Long , P.L. 409 – 414 . Athens, GA, USA .
   Google Scholar
• Chapman , H.D. and Johnson , Z.B. 1992 . Oocysts of Eimeria in the litter of broilers reared to eight weeks of age before and after withdrawal of lasalocid or salinomycin . Poultry Science , 71 : 1342 – 1347 .
   PubMed Web of Science ®Google Scholar
• Conway , D.P. , Sasai , K. , Gaafar , S.M. and Smothers , C.D. 1993 . Effects of different levels of oocyst inocula of Eimeria acervulina, E. tenella, and E. maxima on plasma constituents, packed cell volume, lesion scores, and performance in chickens . Avian Diseases , 37 : 118 – 123 .
   PubMed Web of Science ®Google Scholar
• Dohoo , I. , Martin , W. and Stryhn , H. 2003 . Veterinary Epidemiologic Research , Charlottetown : University of Prince Edward Island .
   Google Scholar
• Graat , E.A. , Ploeger , H.W. , Henken , A.M. , De Vries , R.G. , Noordhuizen , J.P. and Van Beek , P.N. 1996 . Effects of initial litter contamination level with Eimeria acervulina on population dynamics and production characteristics in broilers . Veterinary Parasitology , 65 : 223 – 232 .
   PubMed Web of Science ®Google Scholar
• Graat , E.A. , van der Kooij , E. , Frankena , K. , Henken , A.M. , Smeets , J.F. and Hekerman , M.T. 1998 . Quantifying risk factors of coccidiosis in broilers using on-farm data based on a veterinary practice . Preventive Veterinary Medicine , 33 : 297 – 308 .
   PubMed Web of Science ®Google Scholar
• Hamet , N. 1986 . “ Resistance to anticoccidial drugs in poultry farms in France from 1975 to 1984 ” . In Research in Avian Coccidiosis, Proceedings of the Georgia Coccidiosis Conference , Edited by: McDougald , L.R. , Joyner , L.P. and Long , P.L. 415 – 420 . Athens, GA, USA .
   Google Scholar
• Hamet , N. , Josse , J. , Robin , B. and Toucas , L. 1985 . An epidemiological investigation into coccidiosis and drug resistance in broiler chickens . World's Poultry Science Journal , 41 : 210 – 225 .
   Web of Science ®Google Scholar
• Haug , A. , Thebo , P. and Mattsson , J. G. 2007 . A simplified protocol for molecular identification of Eimeria species in field samples . Veterinary Parasitology , 146 : 35 – 45 .
   PubMed Web of Science ®Google Scholar
• Haug , A. , Gjevre , A. , Thebo , P. , Mattsson , J.G. and Kaldhusdal , M. 2008 . Coccidial infections in commercial broilers; epidemiological aspects and comparison of Eimeria species identification by morphometric and PCR techniques . Avian Pathology , 37 : 161 – 170 .
   PubMed Web of Science ®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
• Long , P.L. and Reid , W.M. 1982 . A guide for the diagnosis of coccidiosis in chickens Research Report 404, University of Georgia, College of Agriculture, Experiment Stations, GA, USA
   Google Scholar
• Løvland , A. and Kaldhusdal , M. 1999 . Liver lesions seen at slaughter as an indicator of necrotic enteritis in broiler flocks . FEMS Immunology & Medical Microbiology , 24 : 345 – 351 .
   PubMed Web of Science ®Google Scholar
• McDougald , L.R. , Fuller , L. and Solis , J. 1986 . Drug-sensitivity of 99 isolates of coccidia from broiler farms . Avian Diseases , 30 : 690 – 694 .
   PubMed Web of Science ®Google Scholar
• McDougald , L.R. , 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
• Oikawa , H. , Kawaguchi , H. , Katagiri , K. and Nakamoto , K. 1979 . Incidence of chicken coccidia from broiler houses in Japan, 1973–1977. Zentralblatt für Bakteriologie, Mikrobiologie und Hygiene . Originale A] , 244 : 339 – 344 .
   Google Scholar
• Peeters , J.E. , Derijcke , J. , Verlinden , M. and Wyffels , R. 1994 . Sensitivity of avian Eimeria spp. to seven chemical and five ionophore anticoccidials in five Belgian integrated broiler operations . Avian Diseases , 38 : 483 – 493 .
   PubMed Web of Science ®Google Scholar
• Raether , W. and Paeffgen , D. 1989 . “ Drug sensitivity of coccidia recently selected from broiler farms in Europe ” . In Coccidia and Intestinal Coccidiomorphs, Proceedings of the Vth International Coccidiosis Conference , Edited by: Yvoré , P. 309 – 312 . Tours, France .
   Google Scholar
• Ryley , J.F. and Wilson , R.G. 1975 . Laboratory studies with some recent anticoccidials . Parasitology , 70 : 203 – 222 .
   PubMed Web of Science ®Google Scholar
• Stallbaumer , M. and Daisy , J.K. 1988 . The effect of monensin, narasin, salinomycin and nicarbazin, on field strains of chicken coccidia . Avian Pathology , 17 : 793 – 801 .
   PubMed Web of Science ®Google Scholar
• Stayer , P.A. , Pote , L.M. and Keirs , R.W. 1995 . A comparison of Eimeria oocysts isolated from litter and fecal samples from broiler houses at two farms with different management schemes during one growout . Poultry Science , 74 : 26 – 32 .
   PubMed Web of Science ®Google Scholar
• Stephan , B. , Rommel , M. , Daugschies , A. and Haberkorn , A. 1997 . Studies of resistance to anticoccidials in Eimeria field isolates and pure Eimeria strains . Veterinary Parasitology , 69 : 19 – 29 .
   PubMed Web of Science ®Google Scholar
• Teilen , M.J.M. 1970 . A production score for broiler operations . World's Poultry Science Journal , 26 : 569 – 570 .
   Web of Science ®Google Scholar
• Williams , R.B. 1973 . The effect of Eimeria acervulina on the reproductive potentials of four other species of chicken coccidia during concurrent infections . British Veterinary Journal , 129 , xxix – xxxi .
   PubMedGoogle Scholar
• Williams , R.B. 1999 . 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 , R.B. 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 , R.B. 2006a . The impact of drug resistant parasites on the epizootiology of coccidiosis . World Poultry , 22 : 32 – 34 .
   Google Scholar
• Williams , R.B. 2006b . Tracing the emergence of drug-resistance in coccidia (Eimeria spp.) of commercial broiler flocks medicated with decoquinate for the first time in the United Kingdom . Veterinary Parasitology , 135 : 1 – 14 .
   PubMed Web of Science ®Google Scholar
• Williams , R.B. , Bushell , A.C. , Répérant , J.M. , Doy , T.G. , Morgan , J.H. , Shirley , M.W. , Yvoré , P. , Carr , M.M. 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