The onset of virus shedding and clinical signs in chickens infected with high-pathogenicity and low-pathogenicity avian influenza viruses

References

• Alexander , D.J. 2003 . Criteria for the definition of pathogenicity of avian influenza viruses . In Proceedings of the Second International Symposium on Avian Influenza 1986 , Athens, Georgia (pp. 228 – 245 ). US Animal Health Association , Richmond, VA , , USA .
   Google Scholar
• Alexander , D.J. and Stuart , J.C. 1982 . Isolation of an influenza A virus from domestic fowl in Great Britain . The Veterinary Record , 111 : 416
   PubMed Web of Science ®Google Scholar
• Alexander , D.J. , Allan , W.H. , Parsons , D. and Parsons , G. 1978 . The pathogenicity of four avian influenza viruses for fowls, turkeys and ducks . Research in Veterinary Science , 24 : 242 – 247 .
   PubMed Web of Science ®Google Scholar
• Alexander , D.J. , Parsons , G. and Manvell , R.J. 1986 . Experimental assessment of the pathogenicity of eight avian influenza viruses of H5 subtype for chickens, turkey, ducks, and quails . Avian Pathology , 15 : 647 – 662 .
   PubMed Web of Science ®Google Scholar
• Allan , W.H. , Madeley , C.R. and Kendal , A.P. 1971 . Studies with avian influenza A viruses: cross protection experiments in chickens . The Journal of General Virology , 12 : 79 – 84 .
   PubMed Web of Science ®Google Scholar
• Bano , S. , Naeem , K. and Malik , S.A. 2003 . Evaluation of pathogenic potential of avian influenza virus serotype H9N2 in chickens . Avian Diseases , 47 : 817 – 822 .
   PubMed Web of Science ®Google Scholar
• Bean , W.J. , Kawaoka , Y. , Wood , J.M. , Pearson , J.E. and Webster , R.G. 1985 . Characterization of virulent and avirulent A/chicken/Pennsylvania/83 influenza A viruses: potential role of defective interfering RNAs in nature . Journal of Virology , 54 : 151 – 160 .
   PubMed Web of Science ®Google Scholar
• Beard , C.W. , Brugh , M. & Johnson , D.C. 1984 . Laboratory studies with the Pennsylvania avian influenza viruses (H5N2) . In Proceedings of the 88th Annual Conference of the United States Animal Health Association (pp. 462 – 473 ). Fort Worth, TX, USA .
   Google Scholar
• Bos , M.E. , Van Boven , M. , Nielen , M. , Bouma , A. , Elbers , A.R. , Nodelijk , G. , Koch , G. , Stegeman , A. and De Jong , M.C. 2007 . Estimating the day of high pathogenicity avian influenza (H7N7) virus introduction into a poultry flock based on mortality data . Veterinary Research , 38 : 493 – 504 .
   PubMed Web of Science ®Google Scholar
• Bowes , V.A. , Ritchie , S.J. , Byrne , S. , Sojonky , K. , Bidulka , J.J. and Robinson , J.H. 2004 . Virus characterization, clinical presentation, and pathology associated with H7N3 avian influenza in British Columbia broiler breeder chickens in 2004 . Avian Diseases , 48 : 928 – 934 .
   PubMed Web of Science ®Google Scholar
• Brown , C.C. , Olander , H.J. and Senne , D.A. 1992 . A pathogenesis study of highly pathogenic avian influenza virus H5N2 in chickens, using immunohistochemistry . Journal of Comparative Pathology , 107 : 341 – 348 .
   PubMed Web of Science ®Google Scholar
• Brugh , M. 1996 . Pathogenicity of three avian influenza viruses for Leghorn hens of different ages . Avian Diseases , 40 : 725 – 728 .
   PubMed Web of Science ®Google Scholar
• Bublot , M. , Pritchard , N. , Cruz , J.S. , Mickle , T.R. , Selleck , P. and Swayne , D.E. 2007 . Efficacy of a fowlpox-vectored avian influenza H5 vaccine against Asian H5N1 highly pathogenic avian influenza virus challenge . Avian Diseases , 51 : 498 – 500 .
   PubMed Web of Science ®Google Scholar
• Butt , K.M. , Smith , G.J. , Chen , H. , Zhang , L.J. , Leung , Y.H. , Xu , K.M. , Lim , W. , Webster , R.G. , Yuen , K.Y. , Peiris , J.S. and Guan , Y. 2005 . Human infection with an avian H9N2 influenza A virus in Hong Kong in 2003 . Journal of Clinical Microbiology , 43 : 5760 – 5767 .
   PubMed Web of Science ®Google Scholar
• Cappucci , D.T. Jr , Johnson , D.C. , Brugh , M. , Smith , T.M. , Jackson , C.F. , Pearson , J.E. and Senne , D.A. 1985 . Isolation of avian influenza virus (subtype H5N2) from chicken eggs during a natural outbreak . Avian Diseases , 29 : 1195 – 1200 .
   PubMed Web of Science ®Google Scholar
• Cauthen , A.N. , Swayne , D.E. , Schultz-Cherry , S. , Perdue , M.L. and Suarez , D.L. 2000 . Continued circulation in China of highly pathogenic avian influenza viruses encoding the hemagglutinin gene associated with the 1997 H5N1 outbreak in poultry and humans . Journal of Virology , 74 : 6592 – 6599 .
   PubMed Web of Science ®Google Scholar
• Centers for Disease Control and Prevention 1997 . Isolation of avian influenza A (H5N1) viruses from humans—Hong Kong, May–December 1997 . MMWR. Morbidity and Mortality Weekly Report , 46 , 1204 – 1207 .
   PubMedGoogle Scholar
• Centers for Disease Control and Prevention 2007 . Avian flu . Atlanta , GA : Centers for Disease Control and Prevention . Avilable online at http://www.cdc.gov/flu/avian/index.htm (accessed Dec 15 2007) .
   Google Scholar
• Chen , H. , Deng , G. , Li , Z. , Tian , G. , Li , Y. , Jiao , P. , Zhang , L. , Liu , Z. , Webster , R.G. and Yu , K. 2004 . The evolution of H5N1 influenza viruses in ducks in southern China . Proceedings of the National Academy of Sciences of the United States of America , 101 : 10452 – 10457 .
   PubMed Web of Science ®Google Scholar
• Claas , E.C. , Osterhaus , A.D. , van Beek , R. , De Jong , J.C. , Rimmelzwaan , G.F. , Senne , D.A. , Krauss , S. , Shortridge , K.F. and Webster , R.G. 1998 . Human influenza A H5N1 virus related to a highly pathogenic avian influenza virus . Lancet , 351 : 472 – 477 .
   PubMed Web of Science ®Google Scholar
• Condobery , P.K. and Slemons , R.D. 1992 . Biological properties of waterfowl-origin type A influenza viruses in chickens . Avian Diseases , 36 : 17 – 23 .
   PubMed Web of Science ®Google Scholar
• Cong , Y.L. , Pu , J. , Liu , Q.F. , Wang , S. , Zhang , G.Z. , Zhang , X.L. , Fan , W.X. , Brown , E.G. and Liu , J.H. 2007 . Antigenic and genetic characterization of H9N2 swine influenza viruses in China . The Journal of General Virology , 88 : 2035 – 2041 .
   PubMed Web of Science ®Google Scholar
• De Benedictis , P. , Joannis , T.M. , Lombin , L.H. , Shittu , I. , Beato , M.S. , Rebonato , V. , Cattoli , G. and Capua , I. 2007 . Field and laboratory findings of the first incursion of the Asian H5N1 highly pathogenic avian influenza virus in Africa . Avian Pathology , 36 : 115 – 117 .
   PubMed Web of Science ®Google Scholar
• Elbers , A.R.W. , Fabri , T.H.F. , de Vries , T.S. , de Wit , J.J. , Pijpers , A. and Koch , G. 2004a . The highly pathogenic avian influenza A (H7N7) virus epidemic in the Netherlands in 2003. Lessons learned from the first five outbreaks . Avian Diseases , 48 : 691 – 705 .
   PubMed Web of Science ®Google Scholar
• Elbers , A.R. , Kamps , B. and Koch , G. 2004b . Performance of gross lesions at postmortem for the detection of outbreaks during the avian influenza A virus (H7N7) epidemic in The Netherlands in 2003 . Avian Pathology , 33 : 418 – 422 .
   PubMed Web of Science ®Google Scholar
• Elbers , A.R. , Koch , G. and Bouma , A. 2005 . Performance of clinical signs in poultry for the detection of outbreaks during the avian influenza A (H7N7) epidemic in The Netherlands in 2003 . Avian Pathology , 34 : 181 – 187 .
   PubMed Web of Science ®Google Scholar
• Elbers , A.R. , Holtslag , J.B. , Bouma , A. and Koch , G. 2007 . Within-flock mortality during the high-pathogenicity avian influenza (H7N7) epidemic in The Netherlands in 2003: implications for an early detection system . Avian Diseases , 51 : 304 – 308 .
   PubMed Web of Science ®Google Scholar
• Forman , A.J. , Parsonson , I.M. and Doughty , W.J. 1986 . The pathogenicity of an avian influenza virus isolated in Victoria . Australian Veterinary Journal , 63 : 294 – 296 .
   PubMed Web of Science ®Google Scholar
• Fouchier , R.A.M. , Schneeberger , P.M. , Rozendaal , F.W. , Broekman , J.M. , Kemink , S.A.G. , Munster , V. , Kuiken , T. , Rimmelzwaan , G.F. , Schutten , M. , van Doornum , G.J.J. , Koch , G. , Bosman , A. , Koopmans , M. and Osterhaus , A.D.M.E. 2004 . Avian influenza A virus (H7N7) associated with human conjunctivitis and a fatal case of acute respiratory distress syndrome . Proceedings of the National Academy of Sciences of the USA , 101 : 1356 – 1361 .
   PubMed Web of Science ®Google Scholar
• Hinshaw , V.S. , Bean , W.J. , Webster , R.G. , Rehg , J.E. , Fiorelli , P. , Early , G. , Geraci , J.R. and St Aubin , D.J. 1984 . Are seals frequently infected with avian influenza viruses? . Journal of Virology , 51 : 863 – 865 .
   PubMed Web of Science ®Google Scholar
• Hooper , P. & Selleck , P. 1998 . Pathology of low and high virulent influenza virus infections . In D.E. Swayne & R. D. Slemons Proceedings of the Fourth International Symposium on Avian Influenza of the US Animal Health Association (pp. 134–141 ). Richmond, VA, USA .
   Google Scholar
• Hooper , P.T. , Russell , G.W. , Selleck , P.W. and Stanislawek , W.L. 1995 . Observations on the relationship in chickens between the virulence of some avian influenza viruses and their pathogenicity for various organs . Avian Diseases , 39 : 458 – 464 .
   PubMed Web of Science ®Google Scholar
• Horimoto , T. , Rivera , E. , Pearson , J. , Senne , D. , Krauss , S. , Kawaoka , Y. and Webster , R.G. 1995 . Origin and molecular changes associated with emergence of a highly pathogenic H5N2 influenza virus in Mexico . Virology , 213 : 223 – 230 .
   PubMed Web of Science ®Google Scholar
• Johnson , D.C. and Maxfield , B.G. 1976 . An occurrence of avian influenza virus infection in laying chickens . Avian Diseases , 20 : 422 – 424 .
   PubMed Web of Science ®Google Scholar
• Johnson , D.C. , Maxfield , B.G. and Moulthrop , J.I. 1977 . Epidemiologic studies of the 1975 avian influenza outbreak in chickens in Alabama . Avian Diseases , 21 : 167 – 177 .
   PubMed Web of Science ®Google Scholar
• Jones , Y.L. and Swayne , D.E. 2004 . Comparative pathobiology of low and high pathogenicity H7N3 Chilean avian influenza viruses in chickens . Avian Diseases , 48 : 119 – 128 .
   PubMed Web of Science ®Google Scholar
• Kinde , H. , Read , D.H. , Daft , B.M. , Hammarlund , M. , Moore , J. , Uzal , F. , Mukai , J. and Woolcock , P. 2003 . The occurrence of avian influenza A subtype H6N2 in commercial layer flocks in Southern California (2000–02): clinicopathologic findings . Avian Diseases , 47 : 1214 – 1218 .
   PubMed Web of Science ®Google Scholar
• Kuiken , T. , Rimmelzwaan , G. , van Riel , D. , van Amerongen , G. , Baars , M. , Fouchier , R. and Osterhaus , A. 2004 . Avian H5N1 influenza in cats . Science , 306 : 241
   PubMed Web of Science ®Google Scholar
• Lee , C.W. , Suarez , D.L. , Tumpey , T.M. , Sung , H.W. , Kwon , Y.K. , Lee , Y.J. , Choi , J.G. , Joh , S.J. , Kim , M.C. , Lee , E.K. , Park , J.M. , Lu , X. , Katz , J.M. , Spackman , E. , Swayne , D.E. and Kim , J.H. 2005a . Characterization of highly pathogenic H5N1 avian influenza A viruses isolated from South Korea . Journal of Virology , 79 : 3692 – 3702 .
   PubMed Web of Science ®Google Scholar
• Lee , C.W. , Swayne , D.E. , Linares , J.A. , Senne , D.A. and Suarez , D.L. 2005b . H5N2 avian influenza outbreak in Texas in 2004: the first highly pathogenic strain in the United States in 20 years? . Journal of Virology , 79 : 11412 – 11421 .
   PubMed Web of Science ®Google Scholar
• Lee , M.S. , Deng , M.C. , Lin , Y.J. , Chang , C.Y. , Shieh , H.K. , Shiau , J.Z. and Huang , C.C. 2007 . Characterization of an H5N1 avian influenza virus from Taiwan . Veterinary Microbiology , 124 : 193 – 201 .
   PubMed Web of Science ®Google Scholar
• Londt , B.Z. , Banks , J. and Alexander , D.J. 2007 . Highly pathogenic avian influenza viruses with low virulence for chickens in in vivo tests . Avian Pathology , 36 : 347 – 350 .
   PubMed Web of Science ®Google Scholar
• Lu , H. and Castro , A.E. 2004 . Evaluation of the infectivity, length of infection, and immune response of a low-pathogenicity H7N2 avian influenza virus in specific-pathogen-free chickens . Avian Diseases , 48 : 263 – 270 .
   PubMed Web of Science ®Google Scholar
• Lu , H. , Castro , A.E. , Pennick , K. , Liu , J. , Yang , Q. , Dunn , P. , Weinstock , D. and Henzler , D. 2003 . Survival of avian influenza virus H7N2 in SPF chickens and their environments . Avian Diseases , 47 : 1015 – 1021 .
   PubMed Web of Science ®Google Scholar
• Lu , H. , Dunn , P.A. , Wallner-Pendleton , E.A. , Henzler , D.J. , Kradel , D.C. , Liu , J. , Shaw , D.P. and Miller , P. 2004 . Investigation of H7N2 avian influenza outbreaks in two broiler breeder flocks in Pennsylvania, 2001–02 . Avian Diseases , 48 : 26 – 33 .
   PubMed Web of Science ®Google Scholar
• Mase , M. , Eto , M. , Tanimura , N. , Imai , K. , Tsukamoto , K. , Horimoto , T. , Kawaoka , Y. and Yamaguchi , S. 2005 . Isolation of a genotypically unique H5N1 influenza virus from duck meat imported into Japan from China . Virology , 339 : 101 – 109 .
   PubMed Web of Science ®Google Scholar
• Mo , I.P. , Brugh , M. , Fletcher , O.J. , Rowland , G.N. and Swayne , D.E. 1997 . Comparative pathology of chickens experimentally inoculated with avian influenza viruses of low and high pathogenicity . Avian Diseases , 41 : 125 – 136 .
   PubMed Web of Science ®Google Scholar
• Morgan , I.R. and Kelly , A.P. 1990 . Epidemiology of an avian influenza outbreak in Victoria in 1985 . Australian Veterinary Journal , 67 : 125 – 128 .
   PubMed Web of Science ®Google Scholar
• Moses , H.E. , Brandley , C.A. and Jones , E.E. 1948 . The isolation and identification of fowl plague virus . American Journal of Veterinary Research , 9 : 314 – 328 .
   Web of Science ®Google Scholar
• Mutinellim , F. , Capuam , I. , Terreginom , C. and Cattolim , G. 2003 . Clinical, gross, and microscopic findings in different avian species naturally infected during the H7N1 low- and high-pathogenicity avian influenza epidemics in Italy during 1999 and 2000 . Avian Diseases , 47 : 844 – 848 .
   PubMed Web of Science ®Google Scholar
• Nakatani , H. , Nakamura , K. , Yamamoto , Y. , Yamada , M. and Yamamoto , Y. 2005 . Epidemiology, pathology, and immunohistochemistry of layer hens naturally affected with H5N1 highly pathogenic avian influenza in Japan . Avian Diseases , 49 : 436 – 441 .
   PubMed Web of Science ®Google Scholar
• Narayan , O. , Lang , G. and Rouse , B.T. 1969 . A new influenza A virus infection in turkeys. IV. Experimental susceptibility of domestic birds to virus strain turkey-Ontario 7732-1966 . Archiv für die gesamte Virusforschung , 26 : 149 – 165 .
   PubMedGoogle Scholar
• Nguyen , D.C. , Uyeki , T.M. , Jadhao , S. , Maines , T. , Shaw , M. , Matsuoka , Y. , Smith , C. , Rowe , T. , Lu , X. , Hall , H. , Xu , X. , Balish , A. , Klimov , A. , Tumpey , T.M. , Swayne , D.E. , Huynh , L.P. , Nghiem , H.K. , Nguyen , H.H. , Hoang , L.T. , Cox , N.J. and Katz , J.M. 2005 . Isolation and characterization of avian influenza viruses, including highly pathogenic H5N1, from poultry in live bird markets in Hanoi, Vietnam, in 2001 . Journal of Virology , 79 : 4201 – 4212 .
   PubMed Web of Science ®Google Scholar
• Nili , H. and Asasi , K. 2003 . Avian influenza (H9N2) outbreak in Iran . Avian Diseases , 47 : 828 – 831 .
   PubMed Web of Science ®Google Scholar
• Okamatsu , M. , Saito , T. , Yamamoto , Y. , Mase , M. , Tsuduku , S. , Nakamura , K. , Tsukamoto , K. and Yamaguchi , S. 2007 . Low pathogenicity H5N2 avian influenza outbreak in Japan during the 2005–2006 . Veterinary Microbiology , 124 : 35 – 46 .
   PubMed Web of Science ®Google Scholar
• Otsuki , K. , Kawaoka , Y. , Nakamura , T. and Tsubokura , M. 1982 . Pathogenicity for chickens of avian influenza viruses isolated from whistling swans and a blacktailed gull in Japan . Avian Diseases , 26 : 314 – 320 .
   PubMed Web of Science ®Google Scholar
• Pelzel , A.M. , McCluskey , B.J. and Scott , A.E. 2006 . Review of the highly pathogenic avian influenza outbreak in Texas, 2004 . Journal of the American Veterinary Medical Assocication , 228 : 1869 – 1875 .
   PubMed Web of Science ®Google Scholar
• Perkins , L.E. and Swayne , D.E. 2001 . Pathobiology of A/chicken/Hong Kong/220/97 (H5N1) avian influenza virus in seven gallinaceous species . Veterinary Pathology , 38 : 149 – 164 .
   PubMed Web of Science ®Google Scholar
• Promkuntod , N. , Antarasena , C. , Prommuang , P. and Prommuang , P. 2006 . Isolation of avian influenza virus A subtype H5N1 from internal contents (albumen and allantoic fluid) of Japanese quail (Coturnix coturnix japonica) eggs and oviduct during a natural outbreak . Annals of the New York Academy of Sciences , 1081 : 171 – 173 .
   PubMed Web of Science ®Google Scholar
• Rimmelzwaan , G.F. , van Riel , D. , Baars , M. , Bestebroer , T.M. , van Amerongen , G. , Fouchier , R.A. , Osterhaus , A.D. and Kuiken , T. 2006 . Influenza A virus (H5N1) infection in cats causes systemic disease with potential novel routes of virus spread within and between hosts . American Journal of Pathology , 168 : 176 – 183 .
   PubMed Web of Science ®Google Scholar
• Savill , N.J. , St Rose , S.G. , Keeling , M.J. and Woolhouse , M.E.J. 2006 . Silent spread of H5N1 in vaccinated poultry . Nature , 442 : 757
   PubMed Web of Science ®Google Scholar
• Shalaby , A.A. , Slemons , R.D. and Swayne , D.E. 1994 . Pathological studies of A/chicken/Alabama/7395/75 (H4N8) influenza virus in specific-pathogen-free laying hens . Avian Diseases , 38 : 22 – 32 .
   PubMed Web of Science ®Google Scholar
• Shortridge , K.F. , Zhou , N.N. , Guan , Y. , Gao , P. , Ito , T. , Kawaoka , Y. , Kodihalli , S. , Krauss , S. , Markwell , D. , Murti , K.G. , Norwood , M. , Senne , D. , Sims , L. , Takada , A. and Webster , R.G. 1998 . Characterization of avian H5N1 influenza viruses from poultry in Hong Kong . Virology , 252 : 331 – 342 .
   PubMed Web of Science ®Google Scholar
• Sims , L.D. , Ellis , T.M. , Liu , K.K. , Dyrting , K. , Wong , H. , Peiris , M. , Guan , Y. and Shortridge , K.F. 2003 . Avian influenza in Hong Kong 1997–2002 . Avian Diseases , 47 : 832 – 838 .
   PubMed Web of Science ®Google Scholar
• Slemons , R.D. and Swayne , D.E. 1990 . Replication of a waterfowl-origin influenza virus in the kidney and intestine of chickens . Avian Diseases , 34 : 277 – 284 .
   PubMed Web of Science ®Google Scholar
• Songserm , T. , Amonsin , A. , Jam-on , R. , Sae-Heng , N. , Pariyothorn , N. , Payungporn , S. , Theamboonlers , A. , Chutinimitkul , S. , Thanawongnuwech , R. and Poovorawan , Y. 2006 . Fatal avian influenza A H5N1 in a dog . Emerging Infectious Diseases , 12 : 1744 – 1747 .
   PubMed Web of Science ®Google Scholar
• Suarez , D.L. , Perdue , M.L. , Cox , N. , Rowe , T. , Bender , C. , Huang , J. and Swayne , D.E. 1998 . Comparisons of highly virulent H5N1 influenza A viruses isolated from humans and chickens from Hong Kong . Journal of Virology , 72 : 6678 – 6688 .
   PubMed Web of Science ®Google Scholar
• Swayne , D.E. 2007 . Understanding the complex pathobiology of high pathogenicity avian influenza viruses in birds . Avian Diseases , 51 : 242 – 249 .
   PubMed Web of Science ®Google Scholar
• Swayne , D.E. and Beck , J.R. 2004 . Heat inactivation of avian influenza and Newcastle disease viruses in egg products . Avian Pathology , 33 : 512 – 518 .
   PubMed Web of Science ®Google Scholar
• Swayne , D.E. and Beck , J.R. 2005 . Experimental study to determine if low-pathogenicity and high-pathogenicity avian influenza viruses can be present in chicken breast and thigh meat following intranasal virus inoculation . Avian Diseases , 49 : 81 – 85 .
   PubMed Web of Science ®Google Scholar
• Swayne , D.E. and Pantin-Jackwood , M. 2006 . Pathogenicity of avian influenza viruses in poultry . Developments in Biologicals , 124 : 61 – 67 .
   PubMedGoogle Scholar
• Swayne , D.E. and Slemons , R.D. 1992 . Evaluation of the kidney as a potential site of avian influenza virus persistence in chickens . Avian Diseases , 36 : 937 – 944 .
   PubMed Web of Science ®Google Scholar
• Swayne , D.E. , Perdue , M.L. , Garcia , M. , Rivera-Cruz , E. and Brugh , M. 1997 . Pathogenicity and diagnosis of H5N2 Mexican avian influenza viruses in chickens . Avian Diseases , 41 : 335 – 346 .
   PubMed Web of Science ®Google Scholar
• Swayne , D.E. , Lee , C.W. and Spackman , E. 2006 . Inactivated North American and European H5N2 avian influenza virus vaccines protect chickens from Asian H5N1 high pathogenicity avian influenza virus . Avian Pathology , 35 : 141 – 146 .
   PubMed Web of Science ®Google Scholar
• Tian , G. , Zhang , S. and Li , Y. 2005 . Protective efficacy in chickens, geese and ducks of an H5N1-inactivated vaccine developed by reverse genetics . Virology , 341 : 153 – 162 .
   PubMed Web of Science ®Google Scholar
• Tiensin , T. , Nielen , M. , Vernooij , H. , Songserm , T. , Kalpravidh , W. , Chotiprasatintara , S. , Chaisingh , A. , Wongkasemjit , S. , Chanachai , K. , Thanapongtham , W. , Srisuvan , T. and Stegeman , A. 2007 . Transmission of the highly pathogenic avian influenza virus H5N1 within flocks during the 2004 epidemic in Thailand . Journal of Infectious Diseases , 196 : 1679 – 1684 .
   PubMed Web of Science ®Google Scholar
• Tsukamoto , K. , Imada , T. , Tanimura , N. , Okamatsu , M. , Mase , M. , Mizuhara , T. , Swayne , D. and Yamaguchi , S. 2007 . Impact of different husbandry conditions on contact and airborne transmission of H5N1 highly pathogenic avian influenza virus to chickens . Avian Diseases , 51 : 129 – 132 .
   PubMed Web of Science ®Google Scholar
• Tumpey , T.M. , Suarez , D.L. , Perkins , L.E. , Senne , D.A. , Lee , J.G. , Lee , Y.J. , Mo , I.P. , Sung , H.W. and Swayne , D.E. 2002 . Characterization of a highly pathogenic H5N1 avian influenza A virus isolated from duck meat . Journal of Virology , 76 : 6344 – 6355 .
   PubMed Web of Science ®Google Scholar
• Van der Goot , J.A. , de Jong , M.C. , Koch , G. and Van Boven , M. 2003 . Comparison of the transmission characteristics of low and high pathogenicity avian influenza A virus (H5N2) . Epidemiology and Infection , 131 : 1003 – 1013 .
   PubMed Web of Science ®Google Scholar
• Van der Goot , J.A. , Koch , G. , de Jong , M.C. and van Boven , M. 2005 . Quantification of the effect of vaccination on transmission of avian influenza (H7N7) in chickens . Proceedings of the National Academy of Sciences of the USA , 102 : 18141 – 18146 .
   PubMed Web of Science ®Google Scholar
• Westbury , H.A. , Turner , A.J. and Kovesdy , L. 1979 . The pathogenicity of three Australian fowl plague viruses for chickens, turkeys and ducks . Veterinary Microbiology , 4 : 223 – 234 .
   Web of Science ®Google Scholar
• Westbury , H.A. , Turner , A.J. and Amon , C. 1981 . Transmissibility of two avian influenza A viruses (H7N7) between chickens . Avian Pathology , 10 : 481 – 487 .
   PubMed Web of Science ®Google Scholar
• World Health Organisation 2006 . Avian Influenza (“Bird Flu”) Fact Sheet . Geneva , , Switzerland : World Health Organisation . Available online at http://www.who.int/mediacentre/factsheets/avian_influenza/en/index.html#humans .
   Google Scholar
• World Organisation for Animal Health 2004 . Highly pathogenic avian influenza . In Manual of Diagnostic Tests and Vaccines for Terrestrial Animals . Paris : World Organisation for Animal Health . Available online at http://www.oie.int/eng/normes/mmanual/A_summry.htm .
   Google Scholar
• Yoon , H. , Park , C.K. , Nam , H.M. and Wee , S.H. 2005 . Virus spread pattern within infected chicken farms using regression model: the 2003–2004 HPAI epidemic in the Republic of Korea . Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health , 52 : 428 – 431 .
   PubMedGoogle Scholar
• Zepeda , C. and Salman , M.D. 2007 . Assessing the probability of the presence of low pathogenicity avian influenza virus in exported chicken meat . Avian Diseases , 51 : 344 – 351 .
   PubMed Web of Science ®Google Scholar
• Ziegler , A.F. , Davison , S. , Acland , H. and Eckroade , R.J. 1999 . Characteristics of H7N2 (nonpathogenic) avian influenza virus infections in commercial layers, in Pennsylvania, 1997–98 . Avian Diseases , 43 : 142 – 149 .
   PubMed Web of Science ®Google Scholar