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作者为了确定带有曼氏血吸虫虫卵的粪便污染物能否感染螺类,将感染曼氏血吸虫的小白鼠所排新鲜粪粒,于滤纸上涂成1.5平方厘米,于23～25℃保存在不同相对湿度下1～72小时后,再对扁卷螺(Biomphalariaglabrata)进行感染。结果:粪便保存于相对湿度24～30%中1小时者未能感染扁卷螺;于相对湿度70～75%中保持2.5小时感染率为51%(18/35),5小时为7%(3/41);于相对湿度90～100%中保持5、16、40和72小时的感染率分别为78%、83%、75%和25%。不满1小时的各对照组(阳性新鲜粪便)感染率
In order to determine whether the stool contaminants carrying Schistosoma mansoni eggs could infect snails, the mice were challenged with fresh fecal pellets of Schistosoma mansoni and coated on filter paper 1.5 cm 2 and stored at 23-25 ° C After 1 to 72 hours at different relative humidity, Bombyx mori (Biomphala riaglabrata) was infected again. Results: Stools were not infected with flat snails for 1 hour in relative humidity of 24-30%; infection rate was 51% (18/35) for 2.5 hours at 70-75% relative humidity and 7% in 5 hours 3/41); infection rates of 78%, 83%, 75% and 25% at 5, 16, 40 and 72 hours of relative humidity 90-100% respectively. Less than 1 hour of each control group (positive fresh faeces) infection rate