祁门县首例人感染H7N9流感病例流行病学调查

Epidemiological investigation of the first case of human avian influenza A(H7N9) virus infection in Qimen county

目的通过对人感染H7N9流感的流行病学调查与分析,为做好防控工作提供科学依据。方法运用描述流行病学方法对患者、密切接触者、患者暴露的禽养殖场和县城区活禽交易市场开展现场流行病学调查,采集外环境标本进行检测分析,进行密切接触者与病例搜索和流感样病例强化监测。结果患者为人感染H7N9流感实验室确诊病例,发病后7d死亡。61名密切接触者未发现不适症状。患者养鸡场鸡粪标本A型流感病毒核酸阳性。患者发病前从事活禽养殖,暴露家养活禽可能是感染来源。结论该患者有确切的禽类接触史,未见人间传播。家养活禽暴露可能为该患者的感染来源。

Objective To analyze the data from epidemiological investigation of the case infected with H7N9 influenza, and provide a scientific basis for further prevention and control. Methods Epidemiological investigation was conducted on the patient, close contact, poultry farms where the patients exposed to and live poultry market located in urban area. External environment samples were collected for testing and analyzing. Close contacts and patients were searched and influenza - like cases monitor were strengthened. Results The patient was laboratory corffirmed case, and died 7 days after the onset of disease. The 61 close contacts were not found symptoms of discomfort. Type A influenza virus nucleic acid of chicken farm manure specimens was positive. The patients were engaged in live poultry farming before the onset of disease, which indicating that exposure to live poultry may be a source of infection. Conclusion The case of human infection with HTN9 flu had the exact poultry exposure history and no human - to - human transmission was found. Exposure to domestic poultry may be the source of infection for the patient.