Objective To survey avian influenza A viruses(AIVs) in the environment and explore the reasons for the surge in human H7 N9 cases.Methods A total of 1,045 samples were collected from routine surveillance on poultry-re...Objective To survey avian influenza A viruses(AIVs) in the environment and explore the reasons for the surge in human H7 N9 cases.Methods A total of 1,045 samples were collected from routine surveillance on poultry-related environments and 307 samples from human H7 N9 cases-exposed environments in Henan from 2016 to2017. The nucleic acids of influenza A(Flu A), H5, H7, and H9 subtypes were detected by real-time polymerase chain reaction.Results A total of 27 H7 N9 cases were confirmed in Henan from 2016 to 2017, 24 had a history of live poultry exposure, and 15 had H7 N9 virus detected in the related live poultry markets(LPMs). About 96%(264/275) Flu A positive-environmental samples were from LPMs. H9 was the main AIV subtype(10.05%) from routine surveillance sites with only 1 H7-positive sample, whereas 21.17% samples were H7-positive in H7 N9 cases-exposed environments. Samples from H7 N9 cases-exposed LPMs(47.56%)had much higher AIVs positive rates than those from routine surveillance sites(12.34%). The H7+H9 combination of mixed infection was 78.18%(43/55) of H7-positive samples and 41.34%(43/104) of H9-positive samples.Conclusion The contamination status of AIVs in poultry-related environments is closely associated with the incidence of human infection caused by AIVs. Therefore, systematic surveillance of AIVs in LPMs in China is essential for the detection of novel reassortant viruses and their potential for interspecies transmission.展开更多
目的了解北京市石景山区居民对人感染H7N9禽流感疫情的相关知识、态度以及相关信息的需求,为石景山区人感染H7N9禽流感疫情的防控工作提供参考。方法采用问卷调查的方法,抽样采用分层整群随机的方法,选择中小学生家长、中学生和老年人...目的了解北京市石景山区居民对人感染H7N9禽流感疫情的相关知识、态度以及相关信息的需求,为石景山区人感染H7N9禽流感疫情的防控工作提供参考。方法采用问卷调查的方法,抽样采用分层整群随机的方法,选择中小学生家长、中学生和老年人作为调查对象,在石景山区健康教育所工作人员指导下填写问卷,数据采用Epi Data 3.0建立数据库,SPSS 17.0进行数据分析。结果问卷调查1529人。在禽流感相关知识的问题中,知晓率前3位的题目是"发热是禽流感发病早期最主要症状之一"、"我国目前出现了禽流感疫情"和"减少与禽类接触,避免接触病死禽畜是防控禽流感的主要措施之一";大多数人采用少食用禽类食品、多洗手和关注疫情来应对禽流感;民众对政府采取的各项举措比较满意;对于禽流感疫情的紧张情绪适当;最希望获取最新疫情动态、个人预防措施和政府防控举措方面的信息。结论石景山区居民对禽流感疫情知晓率较高,能够自觉采用适当有效的方法防控禽流感,但缺乏全面的知识,应继续加强宣传教育。展开更多
基金supported by Henan Department of Science and Technology Project [182102310235]Henan Medical Science and Technology Research Project [201702269]Henan Natural Science Foundation [182300410384]
文摘Objective To survey avian influenza A viruses(AIVs) in the environment and explore the reasons for the surge in human H7 N9 cases.Methods A total of 1,045 samples were collected from routine surveillance on poultry-related environments and 307 samples from human H7 N9 cases-exposed environments in Henan from 2016 to2017. The nucleic acids of influenza A(Flu A), H5, H7, and H9 subtypes were detected by real-time polymerase chain reaction.Results A total of 27 H7 N9 cases were confirmed in Henan from 2016 to 2017, 24 had a history of live poultry exposure, and 15 had H7 N9 virus detected in the related live poultry markets(LPMs). About 96%(264/275) Flu A positive-environmental samples were from LPMs. H9 was the main AIV subtype(10.05%) from routine surveillance sites with only 1 H7-positive sample, whereas 21.17% samples were H7-positive in H7 N9 cases-exposed environments. Samples from H7 N9 cases-exposed LPMs(47.56%)had much higher AIVs positive rates than those from routine surveillance sites(12.34%). The H7+H9 combination of mixed infection was 78.18%(43/55) of H7-positive samples and 41.34%(43/104) of H9-positive samples.Conclusion The contamination status of AIVs in poultry-related environments is closely associated with the incidence of human infection caused by AIVs. Therefore, systematic surveillance of AIVs in LPMs in China is essential for the detection of novel reassortant viruses and their potential for interspecies transmission.
文摘目的了解北京市石景山区居民对人感染H7N9禽流感疫情的相关知识、态度以及相关信息的需求,为石景山区人感染H7N9禽流感疫情的防控工作提供参考。方法采用问卷调查的方法,抽样采用分层整群随机的方法,选择中小学生家长、中学生和老年人作为调查对象,在石景山区健康教育所工作人员指导下填写问卷,数据采用Epi Data 3.0建立数据库,SPSS 17.0进行数据分析。结果问卷调查1529人。在禽流感相关知识的问题中,知晓率前3位的题目是"发热是禽流感发病早期最主要症状之一"、"我国目前出现了禽流感疫情"和"减少与禽类接触,避免接触病死禽畜是防控禽流感的主要措施之一";大多数人采用少食用禽类食品、多洗手和关注疫情来应对禽流感;民众对政府采取的各项举措比较满意;对于禽流感疫情的紧张情绪适当;最希望获取最新疫情动态、个人预防措施和政府防控举措方面的信息。结论石景山区居民对禽流感疫情知晓率较高,能够自觉采用适当有效的方法防控禽流感,但缺乏全面的知识,应继续加强宣传教育。
