Emergence of a new epidemic/epizootic Venezuelan equine encephalitis virus in South America.
Emergence of a new epidemic/epizootic Venezuelan equine encephalitis virus in South America.
复制标题
南美洲出现新的流行病委内瑞拉马脑炎病毒。
DOI:
10.1073/pnas.92.12.5278
复制
发表时间:
1995
影响因子:
11.1
通讯作者:
Salas,RA
中科院分区:
文献类型:
--
作者:
Rico-Hesse,R;Weaver,SC;deSiger,J;Medina,G;Salas,RA
One of the most important questions in arbovirology concerns the origin of epidemic Venezuelan equine encephalitis (VEE) viruses; these viruses caused periodic, extensive epidemics/epizootics in the Americas from 1938-1973 (reaching the United States in 1971) but had recently been presumed extinct. We have documented the 1992 emergence of a new epidemic/epizootic VEE virus in Venezuela. Phylogenetic analysis of strains isolated during two outbreaks indicated that the new epidemic/epizootic virus(es) evolved recently from an enzootic VEE virus in northern South America. These results suggest continued emergence of epizootic VEE viruses; surveillance of enzootic viruses and routine vaccination of equines should therefore be resumed.