Influenza A of subtype H9N2 is established and circulating in poultry throughout the Middle East and Asia [16, 17, 18, 19, 20, 21] . Whereas previous studies in Bangladesh identified H9N2-subtype viruses on 3 farms [22] , current surveillance efforts demonstrate that H9N2 is the primary subtype circulating in chickens at the retail markets. In the markets of Bangladesh, the H9N2 subtype has an estimated prevalence of 16.5%, which is higher than the reported prevalence of 7-8% in the live-bird markets in South Korea [18, 20] . Overall prevalence of the H9N2 subtype is lower in the markets of southern China from 2000-2005, but prevalence peaked at 13% in chickens, 22% in other minor poultry species, and 3% in ducks [35] . The H9N2 subtype has been isolated sporadically from the swine population throughout China [36, 37, 38] . The results of the phylogenetic analyses of the swine isolates suggest that these viruses are reassortants between H5-and H9-subtype viruses [36, 37] . To date, the H9N2-subtype reassortant viruses have not established a stable lineage in the swine population, and it is unknown if these reassortants are currently circulating in the live-bird markets.