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首页> 外文期刊>Journal of Medical Entomology >Vector competence of Australian mosquitoes (Diptera : Culicidae) for Japanese encephalitis virus
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Vector competence of Australian mosquitoes (Diptera : Culicidae) for Japanese encephalitis virus

机译：澳大利亚蚊子（双翅目：Cu科）对日本脑炎病毒的媒介能力

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摘要

Australian mosquitoes were evaluated for their ability to become infected with and transmit a Torres Strait strain of Japanese encephalitis virus. Mosquitoes, which were obtained from either laboratory colonies and collected using Centers for Disease Control and Prevention light traps baited with CO2 and octenol or reared from larvae, were infected by feeding on a blood/sucrose solution containing 10(4.5+/-0.1) porcine stable-equine kidney (PS-EK) tissue culture infectious dose(50)/ mosquito of the TS3306 virus strain. After 14 d, infection and transmission rates of 100% and 81%, respectively, were obtained for a southeast Queensland strain of Culex annulirostris Skuse, and 93% and 61%, respectively, for a far north Queensland strain. After 13 or more days, infection and transmission rates of > 90% and greater than or equal to 50%, respectively, were obtained for southeast Queensland strains of Culex sitiens Wiedemann and Culex quinquefasciatus Say, and a far north Queensland strain of Culex gelidus Theobald. Although infection rates were > 55%, only 17% of Ochlerotatus vigilax (Skuse) and no Cx. quinquefasciatus, collected from far north Queensland, transmitted virus. North Queensland strains of Aedes aegypti L., Ochlerotatus kochi (Donitz), and Verrallina funerea (Theobald) were relatively refractory to infection. Vertical transmission was not detected among 673 F, progeny of Oc. vigilax. Results of the current vector competence study, coupled with high field isolation rates, host feeding patterns and widespread distribution, confirm the status of Cx. annulirostris as the major vector of Japanese encephalitis virus in northern Australia. The relative roles of other species in potential Japanese encephalitis virus transmission cycles in northern Australia are discussed.
机译：对澳大利亚蚊子感染和传播日本脑炎病毒的托雷斯海峡毒株的能力进行了评估。蚊子是从两个实验室的菌落中获得的，并使用疾病控制和预防中心的诱捕装置收集，这些诱捕器用CO2和辛烯醇诱饵或从幼虫饲养，并通过喂入含有10（4.5 +/- 0.1）猪的血液/蔗糖溶液进行感染TS3306病毒株的稳定马肾（PS-EK）组织培养感染剂量（50）/蚊。 14 d后，昆士兰东南部库蚊（Culex annulirostris Skuse）菌株的感染和传播率分别为100％和81％，昆士兰州北部的菌株分别为93％和61％。在13天或更多天后，昆士兰东南部库克斯（Culex sitiens Wiedemann）和库克斯（Culex quinquefasciatus Say）菌株和昆士兰州北部的库蚊（Culex gelidus Theobald）菌株的感染和传播率分别> 90％和大于或等于50％ 。尽管感染率> 55％，但只有17％的Ochlerotatus vigilax（Skuse）没有Cx。从昆士兰州北部地区采集的昆克fa鱼传播了病毒。北昆士兰的埃及伊蚊，Ochlerotatus kochi（Donitz）和Funrallina funerea（Theobald）的感染相对较难。在Oc的后代673 F中未检测到垂直传播。维吉拉克斯当前载体能力研究的结果，加上高场隔离率，宿主进食模式和广泛分布，证实了Cx的状态。在澳大利亚北部，圆环虫是日本脑炎病毒的主要载体。讨论了其他物种在澳大利亚北部潜在的日本脑炎病毒传播周期中的相对作用。

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