Turell M J
Virology Division, U.S. Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD 21702-5011, USA.
J Med Entomol. 1999 Jul;36(4):407-9. doi: 10.1093/jmedent/36.4.407.
Experimental studies were undertaken to evaluate the vector competence of selected mosquito species [Aedes taeniorhynchus (Wiedemann), Culex declarator Dyar and Knab, and Mansonia titillans (Walker)] from northwestern Venezuela for the epizootic (IC) strain of Venezuelan equine encephalitis (VEE) virus that was responsible for the 1995 outbreak of VEE in this area. Ae. taeniorhynchus was highly susceptible to infection (94% of 35), and 89% had a disseminated infection. Virus-exposed Ae. taeniorhynchus that refed on susceptible hamsters readily transmitted virus, confirming that this species was an efficient vector of VEE virus. In contrast, only 1 of 28 (4%) Cx. declarator was infected, and that individual did not develop a disseminated infection. Ma. titillans was moderately susceptible (3 of 8 infected, 38%), and 2 (25%) of these had a disseminated infection. These data indicate that Ae. taeniorhynchus was an important epizootic vector during the 1995 VEE outbreak in Columbia and Venezuela.
开展了实验研究，以评估委内瑞拉西北部选定的蚊虫种类[带纹伊蚊（威德曼）、宣告库蚊（戴尔和克纳布）和骚扰曼蚊（沃克）]对委内瑞拉马脑炎（VEE）病毒流行株（IC株）的媒介能力，该毒株导致了1995年该地区的VEE疫情爆发。带纹伊蚊对感染高度敏感（35只中有94%），89%发生播散性感染。吸食易感仓鼠血液的经病毒感染的带纹伊蚊很容易传播病毒，证实该蚊种是VEE病毒的有效传播媒介。相比之下，28只宣告库蚊中只有1只（4%）被感染，且该个体未发生播散性感染。骚扰曼蚊中度易感（8只中有3只被感染，38%），其中2只（25%）发生播散性感染。这些数据表明，在1995年哥伦比亚和委内瑞拉的VEE疫情爆发期间，带纹伊蚊是一种重要的动物疫源性传播媒介。
