Zahedi M, White G B
Dept. of Parasitology and Medical Entomology, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur.
Trop Med Parasitol. 1994 Mar;45(1):27-32.
The filaria vector competence of Anopheles stephensi was compared with Brugia-susceptible Aedes aegypti Liverpool strain, An. gambiae Badagry Lagos strain and An. dirus Perlis Malaysia strain. An. stephensi ingested more Brugia pahangi microfilariae, had the highest infectivity rate and yielded more infective mosquitoes than the other two anopheline species. The overall vector competence of An. stephensi was 0.13 times that of Ae. aegypti, 0.62 times that of An. gambiae and 2.17 times that of An. dirus. However, heavy mortality among infected An. stephensi in the present investigation indicates that the filaria vectorial capacity of the mosquito might be limited epidemiologically. The relationship between filaria vector competence and mosquito foregut armature is discussed. It was observed that the relative vector competence of the three anopheline species tested was in the same order as their relative degrees of armature elaboration. The converse would be expected if foregut armatures really give partial protection to the mosquitoes against filarial infection. It is suggested that high host microfilariae density favours larval survival proportional to the degree of armature development in Anopheles (Cellia) species.
将斯氏按蚊的丝虫传播能力与对布鲁氏丝虫易感的埃及伊蚊利物浦品系、冈比亚按蚊巴达格里拉各斯品系和大劣按蚊玻璃市马来西亚品系进行了比较。斯氏按蚊摄取的彭亨布鲁线虫微丝蚴更多，感染率最高，且产生的感染性蚊虫比其他两种按蚊更多。斯氏按蚊的总体传播能力是埃及伊蚊的0.13倍、冈比亚按蚊的0.62倍以及大劣按蚊的2.17倍。然而，在本研究中，受感染的斯氏按蚊死亡率很高，这表明该蚊虫的丝虫传播能力在流行病学上可能受到限制。文中讨论了丝虫传播能力与蚊虫前肠结构之间的关系。据观察，所测试的三种按蚊的相对传播能力与其相对的结构复杂程度顺序相同。如果前肠结构真的能为蚊虫提供部分保护使其免受丝虫感染，那么情况则会相反。研究表明，高宿主微丝蚴密度有利于按蚊（塞利按蚊亚属）幼虫的存活，其比例与结构发育程度成正比。
