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1980～1982年,在水网型血吸虫病流行区的4个生产队用现场调查结合模拟实验的方法对虫卵落入有钉螺水体的机率作计量研究。结果发现当地一天血吸虫卵下有螺水体的推算总数,在夏季为12671.6个,在其它季节为9711.1个,分别占当地一天人、畜排血吸虫卵总数的0.90％和0.69％。定量地对比各种虫卵下水方式,发现全年各季均以下河洗刷马桶最为重要,耕牛粪便下水和河边田地施肥也较重要;在夏季,河边粪缸溢出较为重要,仅次于下河洗刷马桶。
From 1980 to 1982, four production teams in the endemic area of water-net schistosomiasis were used to conduct field studies and simulations to investigate the probability of the eggs falling into the snail body. The results showed that the estimated total numbers of Schistosoma japonicum subspecies on the day were 12,661.6 in summer and 9,711.1 in other seasons, accounting for 0.90% and 0.69% of the total number of local human and livestock schistosome eggs respectively. Quantitative comparison of various methods of egg water and found that all the year round the following washing the toilet are the most important river, cattle manure and waterfront farmland fertilization is more important; in summer, the overflow of the river tank is more important, second only to Wash the toilet under the river.