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目的观察洲垸亚型血吸虫病疫情纵向变化规律,分析影响因素。方法居民病情和疫水接触史进行队列研究,家畜病情和螺情进行纵向调查。结果五一村居民累计血吸虫病率72.2%,累计急血患病率8.3%,累计晚血患病率1.6%,疫水暴露率43%。2002~2004年居民粪检阳性率分别为13.7%、11.3%、11.7%。粪检阳性者化疗后一年内疫水暴露率93.4%,居民重复感染率35.1%。五一外洲感染螺分布广泛,钉螺感染率达0.90%,感染螺平均密度0.0263只/0.11 m2。结论垸外草洲是主要疫源地。本地耕牛及副业渔民是主要传染源,也是重复感染的主要对象。这类地区需加强垸外草洲综合治理,压缩疫源地,调整产业结构,提高居民自我防护意识。
Objective To observe the longitudinal change of epidemic situation of embankment subtype schistosomiasis in Chazhou and analyze the influencing factors. Methods Residents’ disease and history of exposure to polluted water were studied in a cohort, and vertical surveys were conducted on domestic animal disease and snail status. Results Wuji village residents cumulative rate of schistosomiasis 72.2%, the cumulative prevalence of acute blood 8.3%, the cumulative prevalence of late blood 1.6%, 43% of exposure to water. The positive rates of fecal examination from 2002 to 2004 were 13.7%, 11.3% and 11.7% respectively. Fecal seizure positive within one year after the chemical water exposure rate of 93.4%, residents repeated infection rate of 35.1%. 51 infection continents Spirulina widely distributed, snail infection rate of 0.90%, infected snail average density 0.0263 /0.11 m2. Conclusion Embankment outside the grass is the main source of disease. Local cattle and sideline fishermen are the main source of infection and are also the main targets of repeated infections. Such areas need to step up comprehensive treatment of embankments outside the grassland, compress the foci, adjust the industrial structure and raise residents’ self-protection awareness.