Virus Shedding and Potential for Interspecies Waterborne Transmission of Highly Pathogenic H5N1 Influenza Virus in Sparrows and Chickens

0301 basic medicine 0303 health sciences 03 medical and health sciences Influenza A Virus, H5N1 Subtype Influenza in Birds Animals Water Microbiology Chickens Sparrows Virus Shedding 3. Good health
DOI: 10.1128/jvi.02017-09 Publication Date: 2010-01-21T02:09:21Z
ABSTRACT
ABSTRACT To elucidate the role of sparrows as intermediate hosts of highly pathogenic avian influenza H5N1 viruses, we assessed shedding and interspecies waterborne transmission of A/duck/Laos/25/06 in sparrows and chickens. Inoculated birds shed virus at high titers from the oropharynx and cloaca, and infection was fatal. Waterborne transmission from inoculated sparrows to contact chickens was absent, while 25% of sparrows were infected via waterborne transmission from chickens. The viral shedding and susceptibility to infection we observed in sparrows, coupled with their presence in poultry houses, could facilitate virus spread among poultry and wild birds in the face of an H5N1 influenza virus outbreak.
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