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Transmission of Avian Influenza Virus (H3N2) to Dogs

By Daesub Song, Bokyu Kang, Chulseung Lee, Kwonil Jung, Gunwoo Ha, Dongseok Kang, Seongjun Park, Bongkyun Park and Jinsik Oh


In South Korea, where avian infl uenza virus subtypes H3N2, H5N1, H6N1, and H9N2 circulate or have been detected, 3 genetically similar canine infl uenza virus (H3N2) strains of avian origin (A/canine/Korea/01/2007, A/canine/ Korea/02/2007, and A/canine/Korea/03/2007) were isolated from dogs exhibiting severe respiratory disease. To determine whether the novel canine infl uenza virus of avian origin was transmitted among dogs, we experimentally infected beagles with this infl uenza virus (H3N2) isolate. The beagles shed virus through nasal excretion, seroconverted, and became ill with severe necrotizing tracheobronchitis and bronchioalveolitis with accompanying clinical signs (e.g., high fever). Consistent with histologic observation of lung lesions, large amounts of avian infl uenza virus binding receptor (SAα 2,3-gal) were identifi ed in canine tracheal, bronchial, and bronchiolar epithelial cells, which suggests potential for direct transmission of avian infl uenza virus (H3N2) from poultry to dogs. Our data provide evidence that dogs may play a role in interspecies transmission and spread of infl uenza virus. Infl uenza A virus, a member of the genus Orthomyxovirus, is an economically important virus that causes disease in humans, pigs, horses, and fowl (1). A crucial feature in the ecology and epidemiology of influenza virus is interspecies transmission (2). The emergence of new virus subtypes and their interspecies transmission is of great concern; measures to counteract their spread are vital for preventing influenza epidemics and pandemics. One of the basic mechanisms of interspecies transmission of influenza virus is direct transfer of an essentially unaltered virus from 1 species to another (3); however, some factors restrict this transfer. In particular, the presence or absence of host species–specific influ

Topics: Green Cross Veterinary Products Company, Ltd, Yong-in, South Korea, †Daewoong Pharmaceutical Company, Ltd, Yong-in, South
Year: 2010
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