Moncayo Abelardo C, Lanzaro Gregory, Kang Wenli, Orozco Arnoldo, Ulloa Armando, Arredondo-Jiménez Juan, Weaver Scott C
Center for Tropical Disease and Department of Pathology, University of Texas Medical Branch, Galveston, Texas 77555-0609, USA.
Am J Trop Med Hyg. 2008 Mar;78(3):413-21.
Venezuelan equine encephalitis virus (VEEV) continues to circulate enzootically in Mexico with the potential to re-emerge and cause disease in equines and humans in North America. We infected two geographically distinct mosquito populations of eastern Psorophora columbiae form columbiae (Chiapas, Mexico and Texas, United States) and one mosquito population of western Psorophora columbiae form toltecum (California, United States) with epizootic and enzootic IE VEEV and epizootic IAB VEEV. We detected no differences between epizootic and enzootic IE viruses in their ability to infect any of the mosquito populations analyzed, which suggested that neither species selects for epizootic IE viruses. Psorophora columbiae f. columbiae (Texas) were significantly less susceptible to infection by epizootic IE than Ps. columbiae f. columbiae (Mexico). Psorophora columbiae f. toltecum populations were more susceptible than Ps. columbiae f. columbiae populations to epizootic IE and IAB viruses.
委内瑞拉马脑炎病毒（VEEV）继续在墨西哥以动物流行病的形式传播，有可能再次出现并在北美引发马和人类疾病。我们用动物流行病和动物地方病的IE型VEEV以及动物流行病的IAB型VEEV感染了两个地理上不同的哥伦比亚疟蚊哥伦比亚亚种（墨西哥恰帕斯州和美国得克萨斯州）的蚊虫种群，以及一个西部哥伦比亚疟蚊托尔蒂亚种（美国加利福尼亚州）的蚊虫种群。我们发现，动物流行病和动物地方病的IE型病毒在感染所分析的任何蚊虫种群的能力上没有差异，这表明这两个物种都不会选择动物流行病的IE型病毒。得克萨斯州的哥伦比亚疟蚊哥伦比亚亚种比墨西哥的哥伦比亚疟蚊哥伦比亚亚种对动物流行病的IE型病毒感染的易感性明显更低。托尔蒂亚种的哥伦比亚疟蚊种群比哥伦比亚亚种的哥伦比亚疟蚊种群对动物流行病的IE型和IAB型病毒更易感。
