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本文从日本血吸虫感染动物的实验室资料入手，了解体内成虫对子数与粪中虫卵计数的关系。在暂不考虑密度依赖效应的情况下，动物宿主猴子的h值（每对虫致2张41．5mg的改良Kato涂片的平均虫卵数）为0．4；考虑全部种类的动物实验结果，h值为0．17。采用虫卵计量变异的数学模式来探讨人类h值的大小，发现h值较大时（如0．40），模型的拟合优度明显地低于取较小数值时，且当h≤0．17时模型对h值的依赖性显著地降低。流行病学现场资料结合数学模型的研究结果表明，人类的h值为0．17。
This article starts from the laboratory data of schistosoma japonicum infected animals to understand the relationship between the number of adult pairs and the count of eggs in feces. The values of h in animal monkeys (mean number of eggs per 2 pairs of 41.5 mg modified Kato smears per pair of worms) were 0.4 without considering the density-dependent effects; considering all animal experiments , H value is 0.17. Using the mathematical model of measurement of egg variation to explore the value of human h, we found that when the value of h is large (eg, 0.40), the goodness of fit of the model is significantly lower than that of the smaller value, and when h≤0 At 17, the model significantly decreased the h-value. The epidemiological field data combined with the mathematical model results show that the human h value of 0.17.