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正阳县位于河南省的东南部,东经114°23′,北纬32°26′,地处淮河平原,气候温暖而湿润,年平均温度14.9℃,年降雨量941mm。全县人口57万,农作物以小麦、玉米为主,有少量水稻。吕河、清水河、慎水河自西向东横穿而过,全县境内沟渠纵横交错,水塘、污水坑星罗棋布,造成了蚊虫大量孳生,且夏秋季群众有乘凉及露宿习惯,个体防护较差,受蚊虫叮咬的机会多,因此构成了丝虫病在我县的传播流行。
Zhengyang County is located in the southeast of Henan Province, east longitude 114 ° 23 ’, latitude 32 ° 26’, located in the Huaihe Plain, warm and humid climate, the annual average temperature of 14.9 ℃, the annual rainfall of 941mm. The county population of 570,000, crops mainly wheat, corn, a small amount of rice. Lvhe, Qingshuihe, Shenshuihe across from west to east, the county ditches criss-cross, ponds, puddles dotted, resulting in a large number of mosquito breeding, and summer and autumn the public have a shade and sleeping habits, individual protection than Poor, the chance of mosquito bites and more, and thus constitute a prevalence of filariasis in my county.