Group A Beta Hemolytic Streptococci and Rheumatic Fever in Miami, Florida: I. Bacteriologic Observations from October 1954 through May 1955
1. An intensive baseline investigation of group A beta hemolytic streptococci isolated from the throats of children six to nine years of age, was carried out in three public schools in Miami, Florida, by means of monthly throat culturing of 333 children during the school year, October 1954 to May 19...
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Veröffentlicht in: | Chest 1959-02, Vol.35 (2), p.175-193 |
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Zusammenfassung: | 1. An intensive baseline investigation of group A beta hemolytic streptococci isolated from the throats of children six to
nine years of age, was carried out in three public schools in Miami, Florida, by means of monthly throat culturing of 333
children during the school year, October 1954 to May 1955. Concurrently, a county-wide survey was done in 48 additional elementary
schools throughout Greater Miami (Dade County); the 1200 children, ages six to nine, in this portion of the study were cultured
one time only, at the rate of 150 children per month.
2. Both baseline and county-wide studies confirmed our previous observations (1953, 1953-54) that group A streptococci could
be recovered frequently from the throats of children in this most southerly large city.
3. The baseline study revealed that 44.7 per cent of an average of 304.6 children harbored group A organisms at least once
during the eight-month school year.
4. Monthly average isolation rates of group A streptococci were 14.16 per cent in the baseline study and 14.25 per cent in
the county-wide survey. The similarity in these two rates indicates, we believe, that the baseline study is representative
of the county-wide prevalence of group A organisms in the age group, six to nine years.
5. There was a small, but definite, decrease in the streptococcal recovery rate with advancing age, in six to nine year old
children, in both baseline and county-wide investigations.
6. Group A streptococci were isolated from the throats of six to seven year old boys more frequently than girls; the proportion
of boys to girls, ages seven to eight, harboring these organisms, was approximately equal; in eight to nine year old children,
girls' throats were positive for streptococci much oftener than boys'. This apparent relationship in the 1954-1955 school
year, of sex and age to streptococcal recovery rates held for both the baseline and county-wide surveys. |
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ISSN: | 0096-0217 0012-3692 2589-3890 1931-3543 |
DOI: | 10.1378/chest.35.2.175 |