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目的掌握流动人口血吸虫病疫情,为制订血吸虫病防治策略提供参考。方法按照整群分层随机抽样方法抽取5个区的30个行政村作为调查点,收集其流动人口信息,每个调查点对100名来自105个血吸虫病未控制县、38个疫情回升县的6～65岁流动人员进行问卷调查和间接血凝试验(IHA)检测,对IHA阳性者进行病原学追踪。结果共调查2 992人,3.82%的流动人口来自未控制县和疫情回升县,IHA检测阳性者64人,阳性率为2.14%。Logistic回归分析显示现职业、来源地类型、治疗史和省份是流动人口IHA检测结果的影响因素。本市流动人口中血清学阳性者约有4 233人,较2004年估算数下降71.88%。病原学追踪54人,均未查到血吸虫虫卵。结论输入性传染源是上海市血吸虫病潜在流行的主要隐患,建议将在市郊从事农牧业的未传播阻断县流动人员作为选择性主动监测的重点人群。
Objective To understand the epidemic situation of schistosomiasis among floating population and provide reference for the development of schistosomiasis control strategy. Methods A total of 30 administrative villages in 5 districts were selected according to cluster stratified random sampling method to collect the floating population information. Each survey point collected 100 population from 105 uncontrolled schistosomiasis counties and 38 outbreak counties Questionnaires and indirect hemagglutination tests (IHA) were performed among migrant workers aged 6 ~ 65, and etiological tracing of IHA positive patients. Results A total of 2 992 people were surveyed. Among them, 3.82% of the floating population came from uncontrolled counties and outbreak counties. There were 64 positive IHA patients with a positive rate of 2.14%. Logistic regression analysis showed that current occupation, type of origin, treatment history and province were the influencing factors of IHA test results in floating population. About 4,233 seropositive persons were present in the floating population of the city, a 71.88% drop from the 2004 estimate. Etiological tracing 54 people, were not found schistosome eggs. Conclusion The sources of imported infectious diseases are the main hidden dangers of the potential epidemic of schistosomiasis in Shanghai. It is suggested that the floating population engaged in agriculture and animal husbandry in the suburbs should not be the focus of selective active monitoring.