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目的掌握上海市外来流动人员中血吸虫病潜在传染源的现况。方法以居住在上海市闵行、浦东2区6个乡(镇)的外来流动人员为调查对象,开展问卷调查和血清学检测,以本地户籍居民为对照。结果共调查2931人,血清学阳性率为6.41%,其中来自血吸虫病流行省、传播阻断省和非流行省的血清学阳性率分别为8.10%、3.65%和2.40%。本地居民阳性率为3.56%,与来自传播阻断省和非流行省人员的血清阳性率之间差异均无显著性(P均>0.05),但与流行省间差异有非常显著性(P<0.01)。来自血吸虫病未控制县和传播控制县人员的血清阳性率高于传播阻断县和非流行县的人员。外来流动人员中阳性者年龄主要集中在10~49岁,学历为小学和初中,来沪居住时间<5年人群。结论来自血吸虫病流行地区的外来流动人员的输入可能对传播已阻断地区带来威胁。应加强外来流动人员的血吸虫病监测,防止传染源的输入。
Objective To investigate the status of potential source of schistosomiasis among floating population in Shanghai. Methods Based on the questionnaire survey and serological test, the floating population living in 6 townships (towns) in Minhang, Shanghai and 2 districts of Pudong were surveyed and compared with the local residents. Results A total of 2931 people were enrolled in this study. The seroprevalence was 6.41%. The positive rates of seroprevalence from schistosomiasis-endemic, transmission-blocking and non-endemic provinces were 8.10%, 3.65% and 2.40% respectively. The positive rate of local residents was 3.56%, but no significant difference was found between the positive rate of seroprevalence and the prevalence of endemic provinces (P <0.05), but there was a significant difference between them (P < 0.01). Seroprevalence was higher in schistosomiasis-controlled and transmission-controlled counties than in transmission block counties and non-epidemic counties. Foreign mobile workers in the positive age mainly concentrated in 10 to 49 years old, education for primary and junior high school, living in Shanghai for <5 years. Conclusion The input of migrants from areas endemic for schistosomiasis may pose a threat to the areas where transmission is blocked. The monitoring of schistosomiasis among migrant workers should be strengthened to prevent the input of infectious agents.