AN EPIDEMIOLOGIC STUDY OF DENGUE TYPE 2 IN PUERTO RICO, 19691

Abstract

Likosky, W. H., C. H. Calisher, A. L. Michelson, R. Correa-Coronas, B. E. Henderson and R. A. Feldman (Epidemiology Program, CDC, Atlanta, Ga. 30333). An epidemiologic study of dengue type 2 in Puerto Rico. 1969. Am J Epidemiol 97: 264–275, 1973.—An epidemic of dengue occurred in Puerto Rico in 1969, with 16,665 reported cases. The outbreak was confined principally to the north of the island. A study of the epidemiology of dengue was carried out in 4 barrios with a total population of 2,872 persons. The overall illness rate was 24 per 100 persons. Infection rates for the barrios were determined by a serologic survey and varied from 8 to 79 per 100 persons. Clusters of dengue cases occurred within families. No apparent differences were noted for either attack rates or severity of the illnesses according to age, sex, geographic location, or previous dengue infection history. No hemorrhagic manifestations were noted.