本文报道在用新鲜虫卵进行环卵沉淀试验(COP)诊断曼氏血吸虫病时观察到的卵内沉淀反应(IOP),典型的反应是虫卵内小泡形成。作者对经寄生虫学证实为曼氏血吸虫病的8例患者的混合阳性血清与10例混合阴性对照血清进行比较。在阳性混合血清进行的10个试验中,显示COP反应的虫卵为37.0±12.7%,而呈IOP反应的虫卵为8.7±4.2%,用阴性混合血清进行的10个试验均 In this paper, we report the ovo deposition (IOP) observed in the egg-encrustation test (COP) with fresh eggs for the diagnosis of Schistosoma mansoni. The typical reaction is vesicle formation in the egg. The authors compared the pooled positive sera of eight patients confirmed to be Parasitic for Man Schistosomiasis to ten mixed negative control sera. In 10 tests conducted with positive pooled sera, the eggs of the COP reaction were 37.0 ± 12.7% and the eggs of the IOP reaction were 8.7 ± 4.2%. All ten tests with the negative mixed serum