新黑纹伊蚊(neomelaniconion)和伊蚊(Aedimorphus/ dentatus (Theobald))传播西尼罗病毒和辛德比斯病毒能力的实验室研究。

P G Jupp
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摘要

对从南非德兰士瓦省的高原地区收集的McIntosh伊蚊和齿纹伊蚊进行了实验室测试,以确定它们传播西尼罗病毒和辛德比斯病毒的能力。携带病毒的仓鼠或一只携带病毒的小鸡被暴露在蚊子面前,作为有传染性的食物。10-26天后,通过对蚊子进行病毒单独检测来确定蚊子感染情况。在10-20天期间,试图通过将仓鼠暴露在蚊子群中传播病毒,但没有实现。就西尼罗河病毒而言,感染每个物种所需的病毒浓度很高,因此得出结论,两者都不是该病毒的重要载体。Sindbis病毒和A. unidentatus的10%感染阈值小于2.6 log,而A. dentatus的10%感染阈值约为3.5 log。这表明,这两个物种,尤其是异位棘虫,都可能是这种病毒的载体。
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Laboratory studies on the vector capability of Aedes (neomelaniconion) unidentatus McIntosh and Aedes (Aedimorphus/ dentatus (Theobald) with West Nile and Sindbis viruses.

Laboratory tests were made with Aedes (Neomelaniconion) unidentatus McIntosh and Aedes (Aedimorphus) dentatus (Theobald) collected from the Highveld region of the Transvaal, South Africa, to determine their ability of transmit West Nile and Sindbis viruses. Viraemic hamsters or a viraemic chick were exposed to the mosquitoes as infective meals. Infection of mosquitoes was determined by testing mosquitoes individually for the presence of virus 10-26 days later. Transmission of virus, attempted between the 10-20th days by exposing hamsters to groups of mosquitoes, was not achieved. With West Nile virus, the high concentrations of virus required to infect each species led to the conclusion that neither is an important vector of this virus. With Sindbis virus and A. unidentatus the 10 per cent infection threshold was less than 2,6 logs of virus, while with A. dentatus it was about 3,5 logs. This suggests that both species, but more particularly A. unidentatus, could be vectors of this virus.

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