2021年3-5月北京市通州区涉禽场所禽流感病毒阳性事件调查分析  

Investigation and analysis of avian influenza virus positive events in poultry markets in Tongzhou district of Beijing from March to May 2021

作　　者：郗璐 杨丽丽 杨玉清[1] 崔燕[1] 郑燃燃 李华 佟玲[1] 杨艳娜[1] Xi Lu;Yang Lili;Yang Yuqing;Cui Yan;Zheng Ranran;Li Hua;Tong Ling;Yang Yanna(Tongzhou District Center for Disease Control and Prevention,Beijing 101100,China)

机构地区：[1]北京市通州区疾病预防控制中心,北京101100

出　　处：《疾病监测》2023年第8期939-943,共5页Disease Surveillance

基　　金：北京市通州区科技计划项目(No.KJ2022CX075)。

摘　　要：目的了解北京市通州区禽流感病毒在涉禽场所外环境中的分布特征,为今后的疫情处置提供科学依据。方法采用描述性流行病学方法于2021年3—5月对通州区涉禽场所禽流感病毒监测阳性事件开展现场流行病学调查,并在全区批发、零售市场开展扩大采样。结果2021年通州区共发生3起涉禽场所禽流感病毒阳性事件,涉及2个农贸市场和1个批发市场。2021年3—5月每月采集2个农贸市场各40件食品涂抹样本,共检出禽流感病毒阳性74件,阳性率30.83%(其中H7N9阳性18件,阳性率7.50%;H9N2阳性56件,阳性率23.33%)。3和5月在全区批发、零售市场开展了扩大采样,3月共采集23家市场的食品和环境样本327件,其中禽流感病毒阳性58件(阳性率17.74%)。5月共采集29家市场的食品和环境样本468件,其中禽流感病毒阳性147件(阳性率31.41%)。在扩大采样中,3月75.00%的乡镇或地区检出了阳性结果,5月所有乡镇或地区均检出了阳性结果。结论本次事件检出农贸市场涉禽场所禽流感病毒以H7N9、H9N2亚型为主,在后续的全区扩大采样中,检出了H5亚型。应继续加强禽流感监测工作,并促进各部门、各地区之间疫情处置的联防联控机制。Objective To understand the distribution characteristics of avian influenza virus in the outside environment of poultry markets in Tongzhou district,Beijing,so as to provide scientific basis for future epidemic management.Methods Descriptive epidemiological methods were used from March to May 2021 to carry out field epidemiological investigation based on avian influenza virus positive cases in poultry markets in Tongzhou district,and expanded sampling was carried out in wholesale and retail markets of the whole district.Results In 2021,there were 3 positive cases of avian influenza virus in poultry markets in Tongzhou district,involving two farmers’markets and one wholesale market.From March to May,40 samples were collected from each of the two farmers'markets.74 samples were positive(30.83%),including 18 H7N9 samples(7.50%)and 56 H9N2 samples(23.33%).In March and May,expanded sampling was carried out in wholesale and retail markets in the whole region.A total of 327 food and environmental samples were collected from 23 markets in March,of which 58 were positive(17.74%).A total of 468 food and environmental samples were collected from 29 markets in May,of which 147 were positive(31.41%).In the expanded surveillance,75.00%of the townships in the district tested positive results in March,and all townships in the district tested positive results in May.Conclusion H7N9 and H9N2 subtypes were mainly detected in this incident,and H5 subtypes were also detected in the subsequent expanded surveillance in the whole region.It is necessary to continue to strengthen the external environment monitoring of avian influenza,and promote the joint prevention and control mechanism among various departments and regions.

关 键 词：禽流感病毒 涉禽场所 监测 疫情 

分 类 号：R211[医药卫生—中医学] R511.7R183.3