不灭钉螺(封洲禁牧)控制大湖洲滩血吸虫病的研究

目的 探讨通过“封洲禁牧”,达到有螺无害,从而控制大湖洲滩血吸虫病的流行。方法 每年3月1日至10月31F{洲滩实施“封洲禁牧”,并查治人、畜血吸虫病。结果 实施3年(2000—2002),监测点(村)人群感染率由1999年的2．66％下降到1．66％,试点乡抽查人群感染率为0．57％(5／871),无急性感染和新感染病人。试点乡耕牛血吸虫感染率由1999年的4．90％下降到0．14％,2岁以下小牛无新感染。草洲钉螺阳性率由1．450％下降到0．005％,阳性钉螺密度由0．01480只／0．1m^2下降到0．00011只／0．1m^2。结论 采取以“封洲禁牧”为主的综合措施,不灭钉螺也可以控制大湖洲滩血吸虫病的流行。

STUDIES ON SCHISTOSOMIASIS CONTROL WITH "MARSHLAND ISOLATION AND FARMING PROHIBITION" BUT NO SNAIL CONTROL IN LAKE MARSHLAND

Objective To explore how to control schistosomiasis at the presence of snails in lake marshland. Methods From March 1st to October 31st every year, 2000-2002- the measure of "marshland isolation and farming prohibition" was carried out. Local residents and cattle were examined and treated for schistosomiasis. Results The infections rate of schistosomiasis in surveillance spots decreased from 2.66% (1999) to 1.66% (2002). The infections rate was 0.57% (5/ 871 ) in the township. There were no acute schislosomiasis cases and new patients. The rate of schistosomiasis of cattle decreased from 4. 90% (1999) to 0. 14% . and there was no new calf under two years of age infected. The rale of infected snails decreased from 1. 450% to 0. 005% , and the density of positive snails from 0. 014 8 snail /0. 1 m2 to 0. 000 11 snail/0. 1 m2. Conclusion The measure, mainly including "marshland isolation and farming prohibition", can control schistosomiasis prevalence even at the presence of snails in lake marshland.