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  • Title: Field studies on the preventive effect of oral artemether against schistosomal infection.
    Author: Xiao S, Shi Z, Zhuo S, Wang C, Zhang Z, Chu B, Zhen J, Chen M.
    Journal: Chin Med J (Engl); 1996 Apr; 109(4):272-5. PubMed ID: 8758286.
    Abstract:
    OBJECTIVE: To study the preventive effect of oral artemether (Art) against schistosomal infection in the field. METHODS: In Minglang District of Yiyang City, Hunan Province, there is an islet with embankment type endemic area in the southern Dongting Lake region. From August to October 1994 the residents who frequently contacted the infested water were selected for study and allocated to the Art group and the control group. About one month before the preventive Art administration, all the residents understudied were examined by stool hatching technique, and then treated orally with praziquantel at a single dose of 40 mg/kg in stool egg-negative residents and 50 mg/kg in stool egg-positive ones. In the Art group, the first dose of 6 mg/kg was given at the end of August, followed by 3 repeated doses every 15 days. Placebo (starch) was given to the control group at the same time as in the Art group. The preventive efficacy was evaluated by stool examination 25-32 days after the last medication. RESULTS: In the Art group, 20 out of 365 studied residents became stool positive with an infection rate of 5.5%, while in the control group, 51 out of 376 studied residents were stool positive with an infection rate of 13.6%. The egg count per gram of feces (EPG) determined by the Kato-Katz method was 122 +/- 79 in the Art group and 681 +/- 909 in the control group. Meanwhile, two cases of acute schistosomiasis were found in the control group, but none was observed in the Art group. No apparent adverse side effect was seen during the treatment with Art. CONCLUSION: Oral Art exhibited apparent preventive effect on the residents who contacted the infested water in schistosomiasis endemic area.
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