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28 June 2011 Influenza A Virus Surveillance in Live-Bird Markets: First Report of Influenza A Virus Subtype H4N6, H4N9, and H10N3 in Thailand
Trong Wisedchanwet, Manoosak Wongpatcharachai, Supanat Boonyapisitsopa, Napawan Bunpapong, Waleemas Jairak, Pravina Kitikoon, Jiroj Sasipreeyajun, Alongkorn Amonsin
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Abstract

A one-year influenza A survey was conducted in 10 live bird markets (LBMs) in H5N1 high-risk areas in Thailand from January to December 2009. The result from the survey showed that the occurrence of influenza A virus (IAV) in LBMs was 0.36% (19/5304). Three influenza A subtypes recovered from LBMs were H4N6 (n  =  2), H4N9 (n  =  1), and H10N3 (n  =  16) from Muscovy ducks housed in one LBM in Bangkok. These influenza subtypes had never been reported in Thailand, and therefore such genetic diversity raises concern about potential genetic reassortment of the viruses in avian species in a particular setting. Two influenza A subtypes (H4N6 and H4N9) were isolated from oropharyngeal and cloacal swabs of the same duck, suggesting co-infection with two influenza subtypes and possible genetic reassortment in the bird. In addition, H10N3 infection in ducks housed in the same LBM was observed. These findings further support that LBMs are a potential source of IAV transmission and genetic reassortment.

American Association of Avian Pathologists
Trong Wisedchanwet, Manoosak Wongpatcharachai, Supanat Boonyapisitsopa, Napawan Bunpapong, Waleemas Jairak, Pravina Kitikoon, Jiroj Sasipreeyajun, and Alongkorn Amonsin "Influenza A Virus Surveillance in Live-Bird Markets: First Report of Influenza A Virus Subtype H4N6, H4N9, and H10N3 in Thailand," Avian Diseases 55(4), 593-602, (28 June 2011). https://doi.org/10.1637/9681-020811-Reg.1
Received: 11 February 2011; Accepted: 1 June 2011; Published: 28 June 2011
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