VENEZUELAN EQUINE ENCEPHALOMYELITIS: SURVEYS OF HUMAN ILLNESS DURING AN EPIZOOTIC IN GUATEMALA AND EL SALVADOR12

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Abstract
Hinman, A. R. (Bureau of Epidemiology, New York State Dept. of Health, Albany, N. Y. 12206), J. E. McGowan, Jr. and B. E. Henderson. Venezuelan equine encephalomyelitis: Surveys of human illness during an epizootic in Guatemala and El Salvador. Amer J Epidem 93: 130–136, 1971.—Serologic and viral isolation studies of human disease were conducted during an equine epizootic of Venezuelan equine encephalomyelitis (VEE) in the summer of 1969 in Guatemala and El Salvador. VEE virus was isolated from the blood of three persons with acute illness, including one person with frank encephalitis. A serologic survey of 467 persons living in areas where horses had VEE indicated an overall infection rate of 20%, with marked variation in positivity rates from area to area (range 0–87% positive). Presence of antibody correlated with history of recent illness. This fact, coupled with essentially uniform age-specific positivity rates, suggests that the areas studied were not endemic for VEE.

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