avian influenza epidemiology in semi-intensive free ranging duck flocks of the moyingyi wetland in bago east district, myanmar.highly pathogenic avian influenza virus subtype h5n1 first entered myanmar in 2006 in the mandalay district. several h5n1 outbreaks followed and the one of bago east district (2007) required post outbreak surveillance in the at-risk domestic duck population of the moyingyi wetland. a field epidemiological study based on a randomised prospective stratified study with five surveys provided the serological evidence that the avian influenza h5 subtype circulates in the domestic duck population and s ...201828956231
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