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对长江三峡大坝截流蓄水前，湖北库区境内4个县1991～1995年疟疾发病现状、流行特征及蚊媒动态进行了研究，结果表明，4个县年平均发病率为0．29／万，病灶点单个病人发病占62．60％，8个镜检站发热病人血检疟原虫年平均阳性率为0.15％、对5314人进行带虫情况血检未发现阳性，人群血清抗体检测1215人均阴性；1993～1995年中华按蚊在人房内年密度每人2／小时分别为25只，28只，21只；牛房内密度分别为142只，160只，144只；5～9月稻田按蚊幼虫密度分别为3只，46只，117只，30只和0只。
Before the closure of the Three Gorges Dam in the Yangtze River, the incidence, prevalence and mosquito dynamics of malaria in 4 counties in Hubei Province from 1991 to 1995 were studied. The results showed that the average incidence of malaria in 4 counties was 0.29 / Wan, the incidence of lesions in a single patient accounted for 62.60%, 8 microscopy examination of fever in patients with blood test of Plasmodium positive average annual rate of 0.15%, 5314 were not infected with insect blood tests found no positive serum antibody detection 1215 Average per capita negative; Anopheles sinensis in the human body in 1993 ~ 1995 annual density of 2 per person per hour were 25, 28, 21; internal density of cattle were 142, 160, 144; 5 to 9 The density of Anopheles stephens larvae were 3, 46, 117, 30 and 0 respectively.