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用噻嘧啶二日疗法或三日疗法观察驱肠道线虫的疗效。结果表明：治疗钩虫感染528例，驱虫阴转率三日疗法为94.6％、二日疗法为81.3％，提示噻嘧啶驱钩虫三日疗法优于二日疗法（x~2+21.6，P＜0.01）；治疗蛔虫感染536例，驱虫阴转率三日疗法为92.6％、二日疗法为90.8％，说明噻嘧啶驱蛔虫三日疗法与二日疗法差异无显著性（x~2=0.9553。P＞0.05），亦说明单纯蛔虫感染者只需二日疗法就可达到满意效果；治疗鞭虫感染227例，驱虫阴转率三日疗法为
Observations on the efficacy of pythiazine on second-day or three-day treatment of intestinal nematodes. The results showed that 528 cases were treated with hookworm infection, the three-day repellent rate was 94.6%, and the second-day treatment was 81.3%. The three-day treatment with pyrimethamine was superior to the second-day treatment (x2 +21.6, P < 0.01) .There were 536 cases of Ascaris infection, the three-day repellent-negative rate was 92.6% and the second-day treatment was 90.8%, which showed no significant difference between the three-day treatment of pyrimethamine and the second treatment (x ~ 2 = 0.9553 .P> 0.05), also shows that patients with roundworm infection only two days therapy can achieve satisfactory results; Treatment of whipworm infection in 227 cases, repellent negative conversion rate of three days