Contamination of avian influenza virus surveillance in external environment in Shaanxi Province from 2011 to 2017
SHI Wei1, ZHANG Lei1, LI Shen1, XU Jing1, MA Ping1, XU Yi1, DONG Jian-hua1, DONG Li-fang1,YU Peng-bo1
1. Shaanxi Provincial Centre for Disease Control and Prevention, Xi’an 710054, China;
2. College of Medicine, Xi’an Jiaotong University, Xi’an 710061, China
Abstract:Exposure history is an important factor in human infection with avian influenza virus (AIV). So, understanding the contamination of AIV in external environment in Shaanxi Province can provide scientific basis for the prevention of human avian influenza epidemic. We collected monitoring data from "Infection Disease Monitor Technique Platform: Avian Influenza Circumstance Monitoring Subsystem". Acquisition of live poultry markets, poultry-scale breeding farms (households), poultry slaughtering and processing plants, etc. as monitoring sites were in 11 cities in Shaanxi Province. Real-time PCR method was used to detect AIV nucleic acid in 6 426 samples collected from Jan 2011 to Dec 2017, and the overall positive rate of AIV was 7.61%. Among the results, the positive rates of H9 subtype was 74.23%, H5 subtype was 15.34% and H7 subtype was 3.89%. A type unclassified and mixed type was 5.73%. The positive rate of AIV in Yulin City (30.40%) and Weinan City (24.59%) was the highest, and both were mainly polluted by AIV viruses in the live poultry market. The positive rates of AIV viruses that slaughtered or placed on the surface of poultry chopping board and swabs for bird cleaning were higher, which were 37.78% and 17.00%, respectively. AIV virus was detected in all four quarters, with the highest positive rate in the first quarter (11.08%). According to the surveillance, we suggested that there are low levels of AIV in the external environment in Shaanxi Province, and comprehensive prevention and control measures should be adopted to reduce the risk of infection in the population.
史伟, 张蕾, 李慎, 许晶, 马萍, 徐艺, 董建华, 董丽芳, 余鹏博. 2011-2017年陕西省外环境中禽流感病毒污染情况分析[J]. 中国人兽共患病学报, 2018, 34(10): 952-956.
SHI Wei, ZHANG Lei, LI Shen, XU Jing, MA Ping, XU Yi, DONG Jian-hua, DONG Li-fang, YU Peng-bo. Contamination of avian influenza virus surveillance in external environment in Shaanxi Province from 2011 to 2017. Chinese Journal of Zoonoses, 2018, 34(10): 952-956.
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