Lai C H, Tung K C, Ooi H K, Wang J S
Department of Veterinary Medicine, College of Veterinary Medicine, National Chung Hsing University, 250 Kuo Kuang Road, ROC, Taichung, Taiwan.
Vet Parasitol. 2000 Jun 27;90(3):231-7. doi: 10.1016/s0304-4017(00)00242-9.
Aedes albopictus and Culex quinquefasciatus were fed canine blood with different microfilarial density of Dirofilaria immitis ranging from 2500 to 25,000 mff/ml. Larval development in these two mosquito species did not differ significantly. Although C. quinquefasciatus ingested more microfilariae, the number of larvae which developed in A. albopictus was invariably greater than in C. quinquefasciatus. Mortality of the engorged A. albopictus was significantly greater than that of C. quinquefasciatus, and higher microfilarial density raised the mortality in both species. The vector efficiency index of A. albopictus was greater than C. quinquefasciatus at all microfilarial densities, but its survival time was much reduced. Thus, dogs with low microfilarial density are implicated as the main source for the transmission of D. immitis from dogs to mosquitoes.
白纹伊蚊和致倦库蚊被喂食了含有不同微丝蚴密度（每毫升2500至25000条微丝蚴）的犬血，这些微丝蚴来自犬恶丝虫。这两种蚊虫的幼虫发育没有显著差异。尽管致倦库蚊摄取的微丝蚴更多，但白纹伊蚊中发育出的幼虫数量始终多于致倦库蚊。饱血的白纹伊蚊的死亡率显著高于致倦库蚊，并且更高的微丝蚴密度会提高这两种蚊虫的死亡率。在所有微丝蚴密度下，白纹伊蚊的媒介效率指数都高于致倦库蚊，但其存活时间大大缩短。因此，微丝蚴密度低的犬被认为是犬恶丝虫从犬传播到蚊虫的主要来源。
