小児咽頭溶連菌の検索ならびに扁桃摘出者に関する溶連菌の検案

抄録

Through our daily practice and various informations concerned we had known that this Santama districts, the west part of Greater Tokyo, are relatively densely infiltrated areas by hemolytic streptococci (HS). Since the inauguration of this hospital, Tokyo Metropolitan Fuchu Hospital, in 1970, we have carried out isolations and group and type determinations of pharyngeal HS from child patients who visited the department of pediatrics of this hospital, the number of cases totaling 293. Additionally, 23 cases of tonsillectomized children were investigated for extra- and intra-tonsillar HS to contribute for not yet definitely secured evaluations of the operation. The period of the survey was from 1971 to 1973. The similar investigation had previously been done by us in Tokyo Metropolitan Komagome Hospital which located in almost central part of Tokyo during 1966-1968 and the both data were compared for areal difference.
The followings are the summarized results and conclusion.
The total positive rate of HS was 39.5% and A group rate in it was 63.9% around Fuchu hospital, and 20.2% and 78.0%, respectively, around Komagome hospital. In type distributions, the study in Komagome hospital revealed the prevalence of T1, T3, T6, T9, and T12, with some yearly fluctuations. In the case of Fuchu districts, T12 and T18 were the prevailing type with little number of T2, T3, T11 and T22. In the connection of this type study, we investigated 6 cases of scarlet fever in 1973 and got T12 from 4 cases, T18 from 1, and untypable from 1. This result seems to reinforce our viewpoint that T12 and T18 are main prevalent stocks around Fuchu Hospital.
It is interesting to see the prvailing inconsistency in type comparison of extra- and intra-tonsillar HS in tonsillectomized cases.