摘要
１９８０～１９８３年，在班氏丝虫病中度流行区的１４个村舍，解剖蚊媒３２３４５只，自然感染率３．３１％。结果表明：淡色库蚊为班氏丝虫病的传播媒介；微丝蚴进入蚊体后，可有５２．２９％发育至感染期幼虫；蚊媒自然感染率多随人群微丝蚴率和感染者微丝蚴平均密度的高低而升降。从有的村不呈相应升降和人群、蚊媒感染率出现自然下降的情况提示，在研究阻断丝虫病的传播阈值时，除病原生物学外，还须结合社会和自然因素综合考虑。在不同地区和不同的流行阶段，这项阈值应该是相应的，而非相同的。１９８７年达到基本消灭丝虫病标准后，当年自然感染率降到０．０３％（１／４０３７）；１９９０～１９９２年为０．１８％（１９／１０７４４），虫期均系脱鞘微丝蚴；１９９３年已无阳性蚊发现（０／２０２０），显示传播已阻断。
Dating from 1980～1983,an investigation had been carried out in 14 vallages of medium endemic area of bancroftian filariasis.The natural infectivity rate obtained by vector mosquito of investigation was 3.31% (1070/32 345).The results indicated that Culex pipiens pallens investigated was a good insect-vector for Wuchereria Bancrofti. 52.29% microfilariae after entering the mosquito's body may develop into infective larvae in the mosquito. Natural infection rate in vector mosquitoes ran in parallel with the microfilariaemia rate and the density of microfilariae in host blood.On epidemic filariasis control in 1987,the natural infection rate declined to 0. 03% (1/4 037).In 1990～1992,the infection rate 0.18% ( 19/17 044).Natural infection of Culex pipiens pallens was not found in 1993( 0/2 020),
出处
《中国媒介生物学及控制杂志》
CAS
CSCD
1995年第3期203-206,共4页
Chinese Journal of Vector Biology and Control
关键词
丝虫病
班氏丝虫病
淡色库蚊
自然感染率
Bancroftian filariasis Culex pipiens pallens Natural infection rate
