Epidemiological Study on Beta Hemolytic Streptococci Among Healthy School Children in Toda City, Saitama
1978 Volume 52 Issue 4 Pages 98-101
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1978 Volume 52 Issue 4 Pages 98-101
The importance of group A hemolytic streptococci in the etiology of rheumatic fever and acute nephritis has been well documented. Further, there are many reports on the epidemiological significance of antistreptolysin-O (ASO) titer and antistreptokinase (ASK) titer as related to streptococcal infection, rheumatic fever and acute nephritis. Therefore, the studies on rheumatic fever and acute nephritis should be based on epidemiology of streptococcal infection.
We studied on relations between the change in the T-type of beta hemolytic streptococci and antibodies distribution among healthy school children living in Toda City, Saitama prefecture since July 1974 to February 1976.
The conclusions of this research are as follows:
1. The incidence of beta hemolytic streptococci among school children was low in summer season and high in winter season.
2. The incidence of abnormal high ASO titer or ASK titer was high in Toda City than in the rural area (Okinawa), respectively.
When T-type 3 was most dominant in February 1975, rate of abnormal ASO, ASK titer were highest.
3. The isolation rate of T-type of 4, 6, 12 were low but T-type 3 was most dominant and T-type 1 was slightly increasing in this survey.
