江滩型地区洪灾与居民血吸虫感染关系

目的 探讨洪灾与血吸虫病流行关系。方法 通过1999年5-11月试区人群暴露方式、人数、次数和时间及人群洪为前后血吸虫病感染率和感染度的调查进行综合分析。结果 试区人群暴露方式共3类11种，总暴露率53.55%。汛期暴露人灵敏，次数及暴露时间显增多。洪灾后人群血吸虫感染率和感染度显增高；暴露组与非暴露组血吸虫感染率和感染度差异有显性。结论 洪灾增加人群暴露和感染，必须针对不同人群和不同暴露方式，加强健康教育和控制发病。

Study on the relationship between flooding and the infection of sc histosoma in the river beach area

Objective To explore the relationship between flood ing and the prevalence of schistosomiasis in the river beach area. Met hods The subjects were investigated on the ways of exposure, frequency and duratio n of water conta cted from May to November in 1999, and eggs of Schistosoma were examined bef ore and after flooding. Results Exposure to infested water for human being s in the area comprised productive, living and recreational contacts including 11 kinds of activities, and 53.55% of the subjects contacted infested w ater. The number of person, frequency and duration of water contacted in floodin g strongly increased; the infection rate and density among population stron gly increased after flooding. There was significant difference between the infec tion rate in exposure group and that in non-exposure group. Conclusions It can be inferred that flooding has increased water contacted and i nfection, therefore, health education should be strengthened to avoid or dec rease water contact.