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Epidemiological study of hemolytic streptococci in pupils in seven prefectures in Japan


Osaka City Medical Journal 31(1): 1-10
Epidemiological study of hemolytic streptococci in pupils in seven prefectures in Japan
In 1983, during six weeks from late April to early June, We isolated hemolytic streptococci from the throats of 2,527 elementary and middle-school pupils in seven prefectures in Japan. Here we give the rate of detention group A, B, C, and G streptococci when the conditions for preparation of the culture medium, collection of the samples, culture methods, and identification were as similar as possible. Rates were higher than reported elsewhere. In all schools, group A was most common, B next, G uncommon; in some classes, group C was extremely infrequent or not detected at all. The detection rate of group A was different for every class of elementary and middle-school, and the difference between the highest and the lowest was by a factor of 2 to 3. For the T-types of group A, the most common were T-13 in Akita and Niigata. T-12 in Osaka, T-28 in Saitama, T-8 in Shimane, T-11 and T-12 in Saga, and T-28, T-1, and T-13 in Kochi. The detection rate of types of group B was 38.0% for Ia, 22.9% for Ic, and 19.4% for Ib. The detection of group A was higher in boys and that of group B was higher in girls. Detection of these streptococci in general was higher in rural areas.


Accession: 005375568

PMID: 3912700



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