| search for persistent epizootic venezuelan encephalitis virus in guatemala, el salvador and nicaragua during 1970-1975. | evidence was sought during 1970-1975 of persistence of equine-virulent venezuelan encephalitis (ve) virus in regions of central america that were heavily involved in the epidemic-equine epizootic of 1969. (a) four sentinel horses were exposed in an arid, upland region of the atlantic drainage of guatemala during august-october 1970, but no horse became infected. (b) the epicenter region of the 1969 outbreak, in southwestern guatemala and southwestern el salvador, was studied during july 1970-feb ... | 1976 | 7139 |