青蒿琥酯预防日本血吸虫再感染临床观察

目的观察青蒿琥酯对日本血吸虫再感染的预防效果。方法志愿者分成3组,服药Ⅰ组服用青蒿琥酯6mg/kg,每周1次,连服4周;服药Ⅱ组于第1、3周服用青蒿琥酯6mg/kg,每周2次;对照组服用外观与青蒿琥酯相同的安慰剂。3组人员均于实验第4周末用吡喹酮40mg/kg驱虫处理,实验第8周末采用改良加藤法粪检观察早期治疗效果,第12周末评估预防再感染的效果。结果早期治疗阶段,服药Ⅰ组、服药Ⅱ组的粪检阳性率与实验前比较差异有统计学意义（P均〈0.05）;预防再感染阶段,服药Ⅰ组、服药Ⅱ组与实验前相比,粪检阳性率均显著下降（P均〈0.05）;而对照组粪检阳性率在实验前后无明显差异。结论青蒿琥酯具有较好的早期治疗和预防血吸虫再感染的效果,剂量6mg/kg,每周服药1次,连续4周的服药方式较好。

Clinical trials on preventive effect of artesunate against reinfection of Schistosoma japonicum

Objective To assess the preventive effect of artesunate against reinfection of Schistosoma japonicum.Methods Volunteers were divided into 3 groups,Medication Group Ⅰ took artesunate 6 mg/kg ,once a week for 4 weeks,Medication Group Ⅱ took artesunate 6 mg/kg in the 1st and 3rd week,twice a week,and a control group was given a placebo.The 3 teams took praziquantel 40 mg/kg on the 4th weekend.The effects of artesunate in early treatment were observed at the 8th weekend,and the preventive effects of artesunate against reinfection were assessed at the 12th weekend.The positive rate of fecal examination was used as the indicator.Results In the stage of early treatment,the positive rates of fecal examination in Medication Group Ⅰ ,Ⅱdecreased significantly compared with the data before the study with all P values less than 0.05 ;in the stage of preventing reinfection,compared with the data before the study,the positive rates of the fecal examination declined significantly in Medication Group Ⅰ,Ⅱ ,with all P values less than 0.05.While in the control group,the positive rates of the fecal examination had no significant changes in the two stages.Conclusions Artesunate has a valid effect against schistosome infections in the early treatment and can prevent residents from reinfection,and the suitable dosage is 6 mg/kg,once a week for 4 weeks.