我县位于北纬34.2度,年平均气温14.3度,年降雨量700毫米以下。中华按蚊为唯一传疟媒介。1952年以来,有三次疟疾流行高峰,共六年时间,年发病率在1至5%之间,其余年发病率均在1%以下,除有间日疟原虫外未发现其他疟原虫存在。属于非稳定性低度疟区。在1970年出现疟疾较大流行后,经过十几年的努力,已使年发病率由 My county is located at latitude 34.2 degrees, the annual average temperature of 14.3 degrees, the annual rainfall of 700 mm below. Anopheles sinensis is the only malaria vector. Three peak malaria episodes have occurred since 1952, for a total of six years, with an annual incidence of between 1 and 5%, with an incidence of less than 1% for the remaining years, with no other Plasmodium other than Plasmodium vivax. Belong to non-stable low malaria area. After a malaria epidemic in 1970, after more than 10 years of hard work, the annual incidence rate has been reduced from