Group A Beta Hemolytic Streptococci and Rheumatic Fever in Miami, Fla.: A Preliminary Report

Case Registry for Rheumatic Fever in Greater Miami, Florida

“…The peak incidence for first attacks occurred between the ages of 10 and 15 years. The highest average antistreptolysin 0 (ASO) titer, 550 Todd units, was found in the group aged [16][17][18][19][20] years. The average titer for all age groups was 414.…”

“…Four- (17,18 "Sensitivity" resulting from previous infee¬ tions with beta hemolytic streptococci may in¬ fluence the development of rheumatic fever, whether genetic predisposition plays a role or not (3,7,15,19). …”

Group A Beta Hemolytic Streptococcus and Rheumatic Fever in Miami, Fla.: 8-Month Bacteriological and Serologic Study

“…The children caime from grades 1 ancd 2 in the same three schools previously studied (4 schlool populationi. A high-income group was omitted because such a group does not maintain year-round residence in Miami and therefore does not permit long-terim observation.…”

“…As in the preliminary study (4), throat swabs were taken in duplicate from all children present in school during the mornings set aside for this phase of the work. The same technician performed all the swabbings within a 2-hour period.…”

“…Seruims from clhildren bearinig typable strainis of group A beta hemolytic streptococcus found at least once, either alone or in coinbination with other groups of beta hemlolytic streptococcus. 4. Serums from clhildreni from whoml-oii (grouip C or group G beta lhemolytic streptococcus.…”