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目的开展江西省首例人感染H7N9禽流感病例流行病学调查,探索可能的感染来源,为进一步认识与防治禽流感提供科学依据。方法运用描述流行病学方法对患者、密切接触者、患者暴露的小区菜场和小区周边活禽市场开展现场流行病学调查,并采集密切接触者、农贸市场环境标本进行检测分析。结果发现江西省首例人感染H7N9禽流感确诊病例无明确病死禽接触史,密切接触者中无不明原因肺炎病例,未发现人与人之间传播证据,相关农贸市场环境标本H7N9禽流感病毒核酸检测阳性。结论江西省首例人感染高致病性禽流感病例属本地感染、非人传人的病例,感染来源可能与农贸市场环境暴露有关。
Objective To carry out epidemiological investigation of the first human case of avian influenza H7N9 in Jiangxi Province and explore the possible sources of infection so as to provide a scientific basis for further understanding and prevention of bird flu. Methods Descriptive epidemiological methods were used to carry out on-site epidemiological investigation of the patients, close contacts, the picnic area exposed by the patients and the live poultry market around the plots, and the environmental samples of close contacts and farmer’s markets were collected for testing and analysis. The results showed that the first human case of H7N9 bird flu confirmed in Jiangxi Province did not have a clear history of poultry contact with pneumoconiosis. There were no obvious causes of pneumonia among the close contacts, and no evidence of transmission was found between the two. Related H5N7 bird flu virus nucleic acid Positive test. Conclusions The first case of human case of HPAI in Jiangxi Province is a case of local infection and non-human transmission. The source of infection may be related to the environmental exposure of farmers’ markets.