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本文综合分析了四川省嗜人按蚊地理分布与水系、人口密度、耕地类型、土壤以及海拔高度的关系：①该蚊主要分布在岷江流域、盆地南部长江干流区以及沱江水系。各水系该蚊在人房按蚊中所占比例存在差异，岷江、长江干流在50％以上，分别为53．86％、61．90％。②人口密度在100～600人以上／km2地带，该蚊分布最广泛；1971～1980年期间，人口密度在600人以上／km2，该蚊分布的比例高达45．71％。③该蚊多数分布在新冲积土、成都粘土、黄壤和紫色土，少数分布在棕壤、灰棕壤、沼泽土、山地草甸土、灰化棕色森林土，看来土壤类型与该蚊地理分布有一定的关系，但不是决定性条件。④四川省该蚊主要分布在海拔1000m以下，存在冬水田的平坝、丘陵或低山地区。最低海拔1000m以上及全旱地地区没有该按蚊分布，说明海拔高度和冬水田的有无，是决定其地理分布非常重要的因素。但海拔1000m以下、存在冬水田的一些县（市），仍然无该蚊分布。因此，决定其地理分布除以上因素外，还有其他条件（如气象因素）在起作用。⑤该蚊分布区疟疾的发病率与人房中该蚊所占比例密切相关。岷江流域、长江干流区人房中该蚊所占比例高，疟疾的发病率也高；相反，沱江、嘉陵江、乌江等水系人房中该蚊所占比例低，疟疾发病率亦低。另外?
This paper comprehensively analyzed the relationship between geographical distribution of Anopheles anthropophagus and water system, population density, cultivated land types, soil and altitude in Sichuan Province. ①The mosquitoes mainly distributed in the Minjiang River Basin, the Yangtze River mainstream in the south of the basin and the Tuojiang River system. The water mosquitoes in the proportion of Anopheles sinensis in the room there is a difference, Minjiang River, the Yangtze River in more than 50%, respectively 53.86%, 61.90%. The density of the mosquitoes is the most widespread in the area of over 100 ~ 600 persons / km2. From 1971 to 1980, the population density was over 600 persons / km2, and the proportion of the mosquitoes was as high as 45.71%. Most of the mosquitoes distributed in the alluvial soil, Chengdu clay, yellow soil and purple soil, a small number of distribution in brown soil, gray brown soil, marsh soil, mountain meadow soil, ashed brown forest soil, it seems the soil type and the mosquito geography Distribution of a certain relationship, but not a decisive condition. (4) The mosquitoes in Sichuan are mainly distributed in the areas of Pingba, hilly or low mountain where winter paddy fields exist below 1000m above sea level. The minimum altitude above 1000m and the whole dryland is not the Anopheles distribution, indicating altitude and winter paddy fields, is to determine its geographical distribution is a very important factor. However, some counties (cities) with winter paddy fields below 1000m below sea level still have no such distribution. Therefore, in addition to determining the geographical distribution of these factors, there are other conditions (such as meteorological factors) at work. ⑤ The incidence of malaria in the mosquito distribution area is closely related to the proportion of the mosquito in the human compartment. The proportion of mosquitoes in the Minjiang River and the mainstreams of the Yangtze River is high, and the incidence of malaria is also high. On the contrary, the proportion of the mosquitoes in Tuojiang, Jialingjiang and Wujiang rivers is low and the incidence of malaria is also low. In addition?