低度疟区传染源的发现,往往是个大问题,近年开展发热病人血检收效较好。但经过多年的观察,我们认为外回人员带虫是威胁低度疟区的重要因素之一。本文就外回人员携带疟原虫进行了调查。凡本地到外地居住半年以上又回到本地或外地进入本地居住 Low levels of infection in malaria area is often found a major problem, in recent years to carry out blood test results in patients with fever is better. However, after many years of observation, we think that it is one of the important factors that threaten the low malaria area that insecticide-borne insects carry insects. This article carried out a survey of malaria parasites carried by outsiders. Where the home to the field more than six months or more returned to the local or foreign to enter the local residence