长期以来,一般都认为憎蚋(Simuliumdamnosum)体内的丝虫幼虫是盘尾丝虫。但近十多年一些学者的研究结果证明,在媒介蚋体内发现的许多丝虫可能不是盘尾丝虫。这种情况对早年根据媒介蚋的解剖来评定盘尾丝虫病的传播率提出了一些疑问。事实上在媒介体内正在发育的幼虫不可能全部被鉴定,第3期幼虫凭其形态仅能区分是否与盘尾丝虫相似,而不能鉴定虫种。近年来用组织化学方法鉴定盘尾丝虫病人的微丝蚴已取 For a long time, the filarial larvae in Simulium damnosum were generally considered to be onchocerciasis. However, the findings of some scholars in recent ten years prove that many filarial worms found in the media may not be onchocerciasis. This situation raises some questions about the rate of transmission of onchocerciasis assessed on the basis of dissection of media in the early years. In fact, the larvae that are developing in the media can not all be identified, and the third larvae can only distinguish whether it is similar to onchocerca and can not identify the species by its shape. In recent years, the use of histochemical methods to identify filarial filarial microfilaria patients have taken