【摘要】 1986年在海南山区以大劣按蚊为主要媒介的疟疾病灶点,用溴氰菊酯浸泡居民蚊帐作为主要的防疟措施,每年一次剂量为20～25mg/m~2,连续实施三年。居民疟疾发病率由处理前1985年的1.17%,降至处理后1989年的0.42%;居民带疟原虫率和血清抗体阳性率同样相应下降,分别由处理前的0.40%和18.1%,降至处理后的0.18%和5.6%,防疟效果较著。灶点的传播强度和感染频率虽已明显减低,但对大劣按蚊种群密度和季节消长以及经产蚊比率,均未见有明显影响。与DDT室内滞留喷洒(2g/m~2)每年～次或两次对照比较,防疟效果无显著差别。浸帐一次对大劣按蚊的生物残效达300d以上,方法较为简便,成本费用较低,群众较易接受,可以替代常规的DDT滞留喷洒,作为疟疾综合防治中的一项主要措施加以推广。更多还原

【Abstract】 since 1986,a trial of deltamethrin impregnated mosquito nets (20～25mg/m~2,one time per year )as a major antimalaria measure,had been conducted for three consecutive years for controlling malaria in residual foci in Hainan Island where An. dirus is the main vector. The result revealed that malaria morbidity of inhabitants decreased from 1. 17% before impregnation (1985) to 0.42% after impregnation (1989). The parasite rate of inhabitants also decreased in corresponding period from 0.4% to 0.18%. Although the intensity of transmission and freguency of infection in residual foci had markedly decreased, it made no significant difference to the population density and seasonal fluctuation and the parous ratio of An. dirus. Comparing with DDT residual spraying once or twice every year, the result of vector control are not marked different between these two measures. Bioassays testing with laboratory-bred An. dirus, the duration of residual toxic effect was more than 300 days through every impregnation. It is suggested that deltamehrin impregnated mosquito nets may be a useful alternative measure in large scale antimalaria campaign because it is simpler, cheaper and more accepted by mass than DDT residual spraying.更多还原