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Am J Trop Med Hyg ; 60(4): 630-4, Apr. 1999.
Artigo em Inglês | MedCarib | ID: med-1351

RESUMO

Phylogenetic analysis of 20 strains of Venezuelan equine encephalitis (VEE) virus subtype IE isolated from 1961 to 1996 in Mexico and throughout Central America showed that VEE virus subtype IE was monophyletic with respect to other VEE virus subtypes. Nonetheless, there were at least three distinct geographically separated VEE virus IE genotypes: northwestern Panama, Pacific coast (Mexico/Guatemala), and Gulf/Caribbean coast (Mexico/Belize). Strains from the Caribbean coast of Guatemala, Honduras, and Nicaragua may cluster with the Gulf/Caribbean genotype, but additional isolates from the region between Guatemala and Panama will be required to firmly establish their phylogenetic position. Viruses associated with two separate equine epizootics in Mexico in the 1990s were phlogenticaly related to nonepizootic viruses from neighbouring Guatemala and may represent the emergence or re-emergence of equine-virulent VEE virus subtype IE in Middle America.(AU)


Assuntos
Adulto , Criança , 21003 , Humanos , Recém-Nascido , Vírus da Encefalite Equina Venezuelana/classificação , Vírus da Encefalite Equina Venezuelana/genética , Encefalomielite Equina Venezuelana/veterinária , Doenças dos Cavalos/virologia , Sequência de Aminoácidos , América Central , Vírus da Encefalite Equina Venezuelana/isolamento & purificação , Encefalomielite Equina Venezuelana/virologia , Cavalos , México , Dados de Sequência Molecular , Filogenia , Precursores de Proteínas/química , Precursores de Proteínas/genética , Proteínas do Envelope Viral/química , Proteínas do Envelope Viral/genética
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