alexa Laboratory studies of Venezuelan equine encephalitis virus in equines, Texas, 1971.
General Science

General Science

Journal of Bioterrorism & Biodefense

Author(s): Calisher CH, Maness KS

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Abstract During the summer and fall of 1971, epizootic and epidemic Venezuelan equine encephalitis was detected in Texas. Isolates of epizootic (IB) and vaccine (TC-83) strains were distinguished by virulence of the former for guinea pigs. Vaccine virus was isolated from 1 to 14 days after vaccination and neutralization tests demonstrated the appearance of antibody about a week after vaccination. Viremia titers of subtype IB in horses ranged from 2.2 to 8.3 log10 suckling mouse intracranial 50\% lethal doses per ml. Of 101 equines from which Venezuelan equine encephalitis virus (IB or TC-83) strains were isolated, 87 had no neutralizing antibody against Venezuelan, eastern or western equine encephalitis viruses.
This article was published in J Clin Microbiol and referenced in Journal of Bioterrorism & Biodefense

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