Emergence of a new epidemic/epizootic Venezuelan equine encephalitis virus in South America.
other · Level V
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- Record sourced from PubMed, PMID 7777497.
- Also identified by PMC identifier 41677.
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Abstract
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.
Medical subject headings
- Encephalitis Virus, Venezuelan Equine
- Encephalomyelitis, Venezuelan Equine