Vector Competence of Culex (Melanoconion) taeniopus for Equine-Virulent Subtype IE Strains of Venezuelan Equine Encephalitis Virus

被引:26
作者
Deardorff, Eleanor R. [1 ]
Weaver, Scott C. [2 ,3 ]
机构
[1] Univ New Mexico, Hlth Sci Ctr, Albuquerque, NM 87131 USA
[2] Univ Texas Med Branch, Ctr Trop Dis, Galveston, TX USA
[3] Univ Texas Med Branch, Dept Pathol, Galveston, TX USA
基金
美国国家卫生研究院;
关键词
E2 ENVELOPE GLYCOPROTEIN; ENCEPHALOMYELITIS VIRUS; EXPERIMENTAL-INFECTION; ENZOOTIC STRAINS; CENTRAL-AMERICAN; MOSQUITOS; GUATEMALA; CULICIDAE; MEXICAN; DIPTERA;
D O I
10.4269/ajtmh.2010.09-0556
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
The mosquito Culex (Melanoconion) taeniopus is a proven vector of enzootic Venezuelan equine encephalitis virus (VEEV) subtype IE in Central America. It has been shown to be highly susceptible to infection by this subtype, and conversely to be highly refractory to infection by other VEEV subtypes. During the 1990s in southern coastal Mexico, two VEE epizootics in horses were attributed to subtype IE VEEV. These outbreaks were associated with VEEV strains with an altered infection phenotype for the epizootic mosquito vector, Aedes (Ochterotatus) taeniorhynchus. To determine the infectivity for the enzootic vector, Culex taeniopus, mosquitoes from a recently established colony were orally exposed to VEEV strains from the outbreak. The equine-virulent strains exhibited high infectivity and transmission potential comparable to a traditional enzootic subtype I E VEEV strain. Thus, subtype I E VEEV strains in Chiapas are able to efficiently infect enzootic and epizootic vectors and cause morbidity and mortality in horses.
引用
收藏
页码:1047 / 1052
页数:6
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