昆明市调查92,911人,感染蛔虫者有59,085人,感染率为63.57%。为了进一步摸清流行因素,为防治对策提供切实依据,特作了一些流行因素调查,报告如下。(一)材料和方法:①土壤检查:地面土:系扫地后称10克为一份。菜地土:系蔬菜地挖土表约3厘米深,每份取土10克,将采取的土样分别投入烧瓶中,加入 Kunming surveyed 92,911 people, with 59,085 people infected with roundworms, the infection rate was 63.57%. In order to further find out the epidemic factors and provide practical basis for prevention and control measures, we made some special investigations into the epidemic factors, which are reported as follows. (A) materials and methods: ① soil inspection: soil: the Department said after sweeping 10 grams. Vegetable soil: Department of vegetable digging soil about 3 cm deep, each 10 grams of soil taken, will take the soil samples were put into the flask, add