| evolutionary pathway for the 2017 emergence of a novel highly pathogenic avian influenza a(h7n9) virus among domestic poultry in tennessee, united states. | in march 2017, a novel highly pathogenic avian influenza a(h7n9) virus was detected at two commercial broiler breeder facilities in tennessee, united states. in this study, a wild bird low pathogenic avian influenza a virus, a/blue-winged teal/wyoming/ah0099021/2016(h7n9), was shown to be the probable precursor of the novel h7n9 virus; this low pathogenic virus has eight possible progenitor genes sharing > 99% sequence identity with the novel h7n9 virus. phylogeographic analyses showed that vira ... | 2018 | 30236990 |
| influenza a viruses from wild birds in guatemala belong to the north american lineage. | the role wild bird species play in the transmission and ecology of avian influenza virus (aiv) is well established; however, there are significant gaps in our understanding of the worldwide distribution of these viruses, specifically about the prevalence and/or significance of aiv in central and south america. as part of an assessment of the ecology of aiv in guatemala, we conducted active surveillance in wild birds on the pacific and atlantic coasts. cloacal and tracheal swab samples taken from ... | 2012 | 22427902 |