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近年来，在血吸虫病疫区（轻度流行区除外）多用吡喹酮普治人群或对重点人群作扩大化疗来控制血吸虫病流行，但吡喹酮仅对吸虫有效，对线虫无效，而这些地区的线虫感染相当普遍。据全国首次人体寄生虫分布调查结果显示，蛔虫感染最高为４６－８８％，其次为蛲虫、鞭虫和钩虫［
In recent years, the population of schistosomiasis endemic (except for mild endemic areas) more than the general population of praziquantel or extended focus on the population to control schistosomiasis epidemic, but praziquantel effective only on trematodes, nematodes ineffective, and these areas The nematode infection is quite common. According to the survey of the distribution of human parasites in the whole country for the first time, the highest infection of roundworms was 46-88%, followed by pinworms, whipworms and hookworms [