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拉哈德和吉齐拉～迈纳吉勒预防血吸虫病和其他水源性疾病的方案是青尼罗卫生工程规划的一部分,开始于1978年的第1个农业季节。拉哈德试区面积为140×15～25km,人口在5万以上。用学龄儿童患病率作为总的传播指标,1980年在新设的学校中
The programs Lahad and Gitila-Menara Jill for the prevention of schistosomiasis and other water-borne diseases are part of the Blue Nile sanitation project which began in the first agricultural season in 1978. Lahad pilot area of 140 × 15 ~ 25km, population of 50,000 or more. The prevalence of school-age children was used as the general indicator of transmission, in 1980, in newly established schools