Lai C H, Tung K C, Ooi H K, Wang J S
Department of Veterinary Medicine, College of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan, ROC.
Med Vet Entomol. 2001 Mar;15(1):64-7. doi: 10.1046/j.1365-2915.2001.00280.x.
From October 1997 to September 1998, 3085 Culex quinquefasciatus (Say) (Diptera: Culicidae), 584 Cx. tritaeniorhynchus (Giles) (Diptera: Culicidae), 392 Cx. annulus (Theobald) (Diptera: Culicidae), 374 Aedes albopictus (Skuse) (Diptera: Culicidae) and 102 Armigeres subalbatus (Coquillet) (Diptera: Culicidae) were collected and examined for Dirofilaria immitis (Leidy) (Spirurida: Filariidae) infection. However, only Cx. quinquefasciatus and Ae. albopictus were infected, with a prevalence of 4.28% and 3.74%, respectively. The intensity of D. immitis found in Ae. albopictus (3.43 larvae/mosquito) was higher than that found in Cx. quinquefasciatus (2.89 larvae/mosquito). After being fed with canine blood containing 7500 microfilariae (mf) per mL, Cx. quinquefasciatus ingested approximately two times as many mf as Ae. albopictus (mean of 31.73 in comparison to 16.47). However, almost three times as many third-stage infective larvae developed in Ae. albopictus as in Cx. quinquefasciatus (mean of 3.25 as compared with 1.10), with a vector efficiency index (VEI) of 19.73 and 3.47, respectively. The results showed that Cx. quinquefasciatus and Ae. albopictus served as natural vectors of D. immitis in central Taiwan. Although Ae. albopictus was more efficient for heartworm transmission, Cx. quinquefasciatus may play a more prominent role on the transmission of dirofilariasis in central Taiwan.
1997年10月至1998年9月，共采集了3085只致倦库蚊（Say）（双翅目：蚊科）、584只三带喙库蚊（Giles）（双翅目：蚊科）、392只环带库蚊（Theobald）（双翅目：蚊科）、374只白纹伊蚊（Skuse）（双翅目：蚊科）和102只骚扰阿蚊（Coquillet）（双翅目：蚊科），并检测其是否感染犬恶丝虫（Leidy）（旋尾目：丝虫科）。然而，仅致倦库蚊和白纹伊蚊被感染，感染率分别为4.28%和3.74%。在白纹伊蚊中发现的犬恶丝虫感染强度（3.43条幼虫/只蚊）高于致倦库蚊（2.89条幼虫/只蚊）。用每毫升含7,500条微丝蚴（mf）的犬血喂养后，致倦库蚊摄取的mf数量约为白纹伊蚊的两倍（平均为31.73条，而白纹伊蚊为16.47条）。然而，在白纹伊蚊中发育的第三期感染性幼虫数量几乎是致倦库蚊的三倍（平均为每只3.25条，而致倦库蚊为1.10条），其媒介效率指数（VEI）分别为19.73和3.47。结果表明，致倦库蚊和白纹伊蚊是台湾中部地区犬恶丝虫的自然传播媒介。虽然白纹伊蚊在传播心丝虫方面效率更高，但致倦库蚊可能在台湾中部地区丝虫病的传播中发挥更突出的作用。
