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December 1956

Group A Beta Hemolytic Streptococci in Relation to Rheumatic Fever: Study of School Children in Miami, Fla.

Author Affiliations

Miami, Fla.
From the Department of Medical Research, National Children's Cardiac Hospital, and the Department of Microbiology and the School of Medicine. University of Miami.

AMA Am J Dis Child. 1956;92(6):550-557. doi:10.1001/archpedi.1956.02060030544002

Because of the etiological relationship attributed to group A beta hemolytic streptococci in rheumatic fever, the pattern of infection with these organisms is presented for greater Miami (Dade County), Fla., an area where rheumatic fever is uncommon. In school children 6 to 9 years of age 25% to 40% of those studied by monthly throat swabbings have group A organisms in their throats at least once each 8-month school year. Groups and types of streptococci isolated are the same as in the North. Approximately 50% of children with such organisms show definite antistreptolysin O rises. Children from whom group A beta hemolytic streptococci (typable or nontypable) are recovered have higher average antistreptolysin O titers and indices than do those children from whom no beta hemolytic streptococci, or only groups of streptococci other than group A, are isolated.

The postulate that 3% of group A beta hemolytic streptococcal infections proceed to

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