Comparative Infections of Epizootic and Enzootic Strains of Venezuelan EquineEncephalomyelitis Virus in Amblyomma cajennense (Acari: Ixodidae)

摘要

To compare the potential for an enzootic or an epizootic strain of Venezuelanequine encephalomyelitis (VEE) virus to infect Amblyomma cajennense (F.), larval ticks were fed on guinea pigs (strain 13) inoculated with an enzootic viral strain of variant I-E (68U201) or on guinea pigs inoculated with an epizootic strain of variant I-A (Trinidad donkey). Peak viremias were 10(5.2) plaque-forming units (PFU)/ml and 107.3 PFU/ml in guinea pigs infected with enzootic and