Audibert M, Josseran R, Josse R, Adjidji A
CNRS, Aix-en-Provence, France.
Am J Trop Med Hyg. 1990 Jun;42(6):550-60. doi: 10.4269/ajtmh.1990.42.550.
Field studies of a rice irrigation project in Mayo-Danai, North Cameroon permitted a direct comparison between pre- and post-development data relating to schistosomiasis and malaria infection. A stratified sample of 4,000 inhabitants, representing 8% of the population living in 28 areas at the time of the first survey, was investigated 5 times between 1979 and 1985. Due to the significant population increase since 1982, 1,500 persons were added to the initial sample. The prevalence of schistosomiasis and malaria remained constant over the 6 years. No changes in the transmission sites were observed. Malacological investigations showed a decrease in the snail population in the project area. Sanitation activities (i.e., drain cleaning and well construction) and decreased rainfall contributed to this situation. The prevalence of infection among the migrants was low. High prevalence of schistosomiasis was found only in villages located along a previously contaminated temporary river.
对喀麦隆北部马约-达奈一个水稻灌溉项目进行的实地研究，使得能够直接比较开发前后与血吸虫病和疟疾感染相关的数据。1979年至1985年间，对一个分层样本中的4000名居民进行了5次调查，这些居民占首次调查时居住在28个地区的人口的8%。由于1982年以来人口显著增加，在初始样本中又增加了1500人。血吸虫病和疟疾的流行率在这6年中保持不变。未观察到传播地点有变化。贝类学调查显示项目地区的蜗牛数量减少。卫生活动（即排水清理和水井建设）以及降雨量减少导致了这种情况。移民中的感染率较低。仅在一条先前受污染的临时河流沿岸的村庄中发现血吸虫病的高流行率。
