Title |
The pathobiology of two Indonesian H5N1 avian influenza viruses representing different clade 2.1 sublineages in chickens and ducks
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Published in |
Comparative Immunology, Microbiology & Infectious Diseases, January 2013
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DOI | 10.1016/j.cimid.2012.12.001 |
Pubmed ID | |
Authors |
Hendra Wibawa, John Bingham, Harimurti Nuradji, Sue Lowther, Jean Payne, Jennifer Harper, Frank Wong, Ross Lunt, Akhmad Junaidi, Deborah Middleton, Joanne Meers |
Abstract |
To determine the pathobiology of Indonesian H5N1 highly pathogenic avian influenza, two viruses representing clades 2.1.1 and 2.1.3 were inoculated into broiler chickens and Pekin ducks via the eyes, nostrils and oropharynx. In chickens, both viruses produced fulminant disease; tissue tropism was broad but predominantly endothelial and viral loads in tissues were high. Except for one case of meningoencephalitis, the infection in ducks was sub-clinical, leading only to seroconversion. In these ducks, virus and viral antigen occurred in lower amounts, mainly in the respiratory tract (airsac and sinuses), prior to day 7 after inoculation. During clinical disease, chickens shed high virus titres orally and cloacally. Ducks intermittently shed low virus titres from the oral route for up to 8 days post-inoculation. We discuss the significance of the data for understanding the pathogenesis and pathobiology of Indonesian H5N1 in chickens and ducks. |
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