Experimental Assessment of the Pathogenicity of H5N1 Influenza A Viruses Isolated in Japan

We examined the pathogenicity for chickens of two H5N1 avian influenza viruses isolated in Japan, A/chicken/Yamaguchi/7/2004 (Ck/Yamaguchi/7/04) isolated from outbreaks in commercial layer chickens, and A/duck/Yokohama/aq10/2003 (Dk/Yokohama/aq10/03) isolated from duck meat imported from China. All...

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Bibliographic Details
Published in:Avian diseases 2005-12, Vol.49 (4), p.582-584
Main Authors: Mase, Masaji, Imada, Tadao, Nakamura, Kikuyasu, Tanimura, Nobuhiko, Imai, Kunitoshi, Tsukamoto, Kenji, Yamaguchi, Shigeo
Format: Article
Language:English
Subjects:
Administration, Intranasal
Animals
Chick Embryo
Chickens
Chickens - virology
China
Ducks
Ducks - virology
Eggs
EID = egg infectious dose
Flocks
Genotypes
H5N1 subtype
H5N1 subtype influenza A virus
HPAI = highly pathogenic avian influenza
IC = in contact
IN = inoculated intranasally
Influenza A virus
Influenza A Virus, H5N1 Subtype - classification
Influenza A Virus, H5N1 Subtype - isolation & purification
Influenza A Virus, H5N1 Subtype - pathogenicity
Influenza in Birds - etiology
Influenza in Birds - virology
Japan
MDT = mean death time in days
Meats
MTO = mean time of onset of signs in days
Orthomyxoviridae
pathogenicity
Research Note
Research Notes
Species Specificity
SPF = specific pathogen free
Time Factors
Virulence
Viruses
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Summary:We examined the pathogenicity for chickens of two H5N1 avian influenza viruses isolated in Japan, A/chicken/Yamaguchi/7/2004 (Ck/Yamaguchi/7/04) isolated from outbreaks in commercial layer chickens, and A/duck/Yokohama/aq10/2003 (Dk/Yokohama/aq10/03) isolated from duck meat imported from China. All chickens inoculated intranasally with either strain died, and the viruses were reisolated from all organs examined. However, both the mean time of onset of clinical signs and the mean death time of Ck/Yamaguchi/7/04 were shorter than those of Dk/Yokohama/aq10/03.
ISSN:0005-2086
1938-4351
DOI:10.1637/7364-041105R.1