Abstract:Objective To analyze the epidemiological characteristics and surveillance results of human infection with avian influenza A (H7N9) virus in Longhua New District of Shenzhen so as to provide a scientific basis for rational control and prevention of avian influenza (H7N9). Methods The information about the H7N9 cases reported and relevant surveillance in Longhua New District of Shenzhen during 2013-2015 was collected and descriptively analyzed. Results A total of 5 H7N9 cases were reported in Longhua New District of Shenzhen from 2013 to 2015, with 1 death. The median time from illness onset to laboratory confirmed diagnosis was 7 days, the median time from illness onset to pneumonia was 3.5 days and the median time from illness onset to antiviral treatment with Duffy was 4 days. All the patients had a history of exposure to live poultry markets before illness onset. We tested 626 samplesof the external environment oflive poultry markets in Longhua New District of Shenzhen from 2013 to 2015. 117 samples were positive to avian influenza virus H7 subtype, with the positive rate being 18.69%, and the positive rate of H7 subtype in the samplesof the external environment oflive poultry markets which related to patients’ exposure history reached up to 31.43%. However, the positive rate of H7 subtype in the samples of the external environment of poultry markets was significantly decreased after suspending live poultry trade (χ2=13.52, P<0.001). Conclusions The primary risk factor for human infection with avian influenza A(H7N9) appears to be exposure to live poultry markets and contaminated environment; and hence, banning live poultry trade can effectively decrease the opportunity of infection with avian influenza A(H7 subtype) from poultry markets.
何林, 周小锋, 许少坚, 王金明, 彭伟军. 深圳市龙华新区2013-2015年人感染H7N9禽流感发病及监测情况分析[J]. 实用预防医学, 2017, 24(6): 728-730.
HE Lin, ZHOU Xiao-feng, XU Shao-jian, WANG Jin-ming, PENG Wei-jun. Incidence and surveillance of human infection with avian influenza A(H7N9) virusin Longhua New District of Shenzhen, 2013-2015. , 2017, 24(6): 728-730.
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