Enhanced environmental surveillance for avian influenza A/H5, H7 and H9 viruses in Guangxi, China, 2017–2019

• DOI: 10.1016/j.bsheal.2022.12.006
• Publication Date: 2023-01-02T06:54:58Z
• Authors: Tao Chen; Yi Tan; Ying Song; Guangwu Wei; Zhiqiang Li; Ximing Wang; Jing Yang; Alexander J. Millman; Minmei Chen; Deping Liu; Tao Huang; Ming Jiao; Weitao He; Xiuchang Zhao; Carolyn M. Greene; James C. Kile; Suizan Zhou; Ran Zhang; Xiaoxu Zeng; Qian Guo; Dayan Wang
• Keywords: Biosecurity; Highly pathogenic; Poultry farming

We conducted environmental surveillance to detect avian influenza viruses circulating at live poultry markets (LPMs) and farms in Guangxi Autonomous Region, China, where near the China-Vietnam border. From November through April 2017-2018 2018-2019, we collected samples from 14 LPMs, 4 farms, 5 households with backyard two counties of tested for A, H5, H7, H9 by real-time reverse transcription-polymerase chain reaction (rRT-PCR). In addition, four cross-sectional questionnaire surveys among stall owners on biosecurity practices LPMs study sites. Among 16,713 specimens tested, median weekly positive rate A was 53.6% (range = 33.5% - 66.0%), including 25.2% H9, 4.9% 21.2% other subtypes, whereas a total H7 were detected. 189 LPM stalls investigated, most (73.0%) sold chickens ducks. Therefore, continued virus is necessary detecting responding emerging trends epidemiology.