A Four-Year Study of the Occurrence of Beta-Hemolytic Streptococci in 64 School Children

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Abstract
AN epidemiologic study of streptococcal infection among 1000 children, attending three Philadelphia public schools, was conducted from October, 1955, through May, 1959. It offered an opportunity for a cohort investigation of the occurrence of streptococci in the children who participated in the study through the four years. Data on the entire group have been presented, in cross-sectional fashion, in previous papers.1 2 3 These indicated a low incidence of respiratory infections accompanied by throat cultures positive for streptococci, despite a relatively high carrier rate for beta-hemolytic streptococci. The group of children with streptococcal infection could not be distinguished from the children with . . .