作者等在研究南非曼氏血吸虫病患者粪便中虫卵的寿命时,发现每天孵出的虫卵数逐渐减少,同时呈现一个周期性,于是对虫卵孵化的规律进行了一些观察,结果如下: 1.粪样一次收集后,保存在阴处,连续7天每天取一定量(500个虫卵)作孵化,每小时观察一次毛蚴。结果前6天都有毛蚴孵出,第七天没有。第一天以后,孵化高峰都在早晨7～9小时。2.当天的粪便,下午稀释后只有极少虫 When studying the life expectancy of eggs in the feces of Schistosoma mansoni from South Africa, the authors found that the number of eggs hatched per day decreased gradually while showing a periodic pattern. Some observations were made on the law of egg hatching. Results are as follows: 1. Once the fecal sample is collected, it is stored in the shade, and a certain amount (500 eggs) are hatched daily for 7 consecutive days. Mirabilis is observed every hour. The results of the first 6 days have miracidia hatch, the seventh day did not. After the first day, the peak incubation time is 7 to 9 hours in the morning. 2. The day’s excrement, afternoon diluted only very few pests