关键词: 白纹伊蚊, 登革Ⅱ型病毒, 经卵传递, 水平传播

Abstract: Virus isolation in C6/36 cells was used for detection of the infection rates of F₁ progeny from diapausing eggs of infected Aedes albopictus. Eggs from three gonotrophic cycles (GC) were collected, and vertical transmission was not observed in the first gonotrophic cycle, while there was no significant difference observed between the infection rates of the GC2 progeny and that of the GC3 progeny (P＞0.05). The total positive rate of pools was 9.1%, and the minimum infection rate was 1∶330. The results of indirect fluorescent antibody test showed that F₁ adult mosquitoes obtained from diapausing eggs can transmit dengue 2 virus to sensitive mice horizontally through biting. The horizontal transmission rate was 6.1%. These results indicate that dengue 2 can be transmitted vertically even the infected eggs are induced into diapausing, and F₁ adult mosquitoes raised from diapausing eggs can transmit dengue 2 virus to sensitive mice horizontally via biting.

Key words: Aedes albopictus, dengue 2 virus, transovarial transmission, horizontal transmission