摘要
目的 调查嗜人按蚊的传疟作用 ,为嗜人按蚊分布区媒介监测和制订合理的防治措施提供依据。 方法 在河南省信阳市二十里河村选择 5个自然村作为观察点 ,采用寄生虫学和昆虫学方法进行调查 ,估算嗜人按蚊的媒介能量和临界叮人率。 结果 1999年 7～ 8月 ,居民带虫发病率为 7.4% ,原虫率为 2 .0 % ,IFAT抗体阳性率为 8.4%。嗜人按蚊密度组成在人房内占优势 ,平均叮人率为 4.9388/(人 /夜 ) ,人血指数为 0 .785 7,媒介能量为 5 .5 2 96 ,是中华按蚊的 6 .2倍。嗜人按蚊临界叮人率为 0 .2 40 7(人 /夜 ) ,而实际叮人率是它的 2 0倍。结论 嗜人按蚊是当地疟疾传播的主要媒介。提示临界叮人率在媒介监测中具有应用的意义。目的 调查嗜人按蚊的传疟作用 ,为嗜人按蚊分布区媒介监测和制订合理的防治措施提供依据。 方法 在河南省信阳市二十里河村选择 5个自然村作为观察点 ,采用寄生虫学和昆虫学方法进行调查 ,估算嗜人按蚊的媒介能量和临界叮人率。 结果 1999年 7～ 8月 ,居民带虫发病率为 7.4% ,原虫率为 2 .0 % ,IFAT抗体阳性率为 8.4%。嗜人按蚊密度组成在人房内占优势 ,平均叮人率为 4.9388/ (人 /夜 ) ,人血指数为 0 .785 7,媒介能量为 5 .5 2 96 ,是中华按蚊的 6 .2倍。
Objective To study the role of Anopheles anthropophagus in malaria transmission and transmission threshold so as to provide basis for vector surveillance and malaria control strategy. Methods Parasitological and entomological methods were used in the investigation at 5 villages of Xinyang City, Henan Province. Results From July to August, 1999, 74 febrile cases (10\^9% of the total population) were examined. Among them 50 were infected, the incidence in the population of surveyed spots was 7\^4%. Active detection was made in another randomly selected two villages and found that the parasite rate in the inhabitants was 2\^0%, and the positive rate of IFA was 8\^4%. Only vivax malaria was detected. An.anthropophagus and An.sinensis were collected, with An.anthropophagus as the predominant one in human dwellings. The estimated man\|biting rate and the human blood index were 4\^9388 and 0\^7858 respectively. The vectorial capacity of An. anthropophagus was 5\^5296. The critical man\|biting rate of An.anthropophagus was 0\^2407 as calculated by the formula (ma=-rlnP/abP\+n) according to Macdonald′s model.The local man\|biting rate was 20 times higher than that of the critical man\|biting rate. Conclusion The results demonstrated that An.anthropophagus is the principal vector in malaria transmission in the area. The findings imply that the critical man\|biting rate is of practicable importance in vector surveillance.
出处
《中国寄生虫学与寄生虫病杂志》
CAS
CSCD
北大核心
2001年第4期221-224,共4页
Chinese Journal of Parasitology and Parasitic Diseases
基金
卫生部 / WHO资助项目 ( No:CHN/ MAL/ 0 0 1)&&
关键词
嗜人按蚊
媒介能量
临界叮人率
疟疾
河南
An.anthropophagus, vectorial capacity, critical man\|biting rate
