TYPE DISTRIBUTION OF GROUP A COXSACKIE VIRUSES ISOLATED IN JAPAN

1. 120 strains of Group A Coxsackie viruses isolated in Tokyo were typed by means of neutralization reaction. Of these strains 7 was isolated in 1951-52, 24 in 1953-54, 71 from herpangina patients and the remaining 18 in 1955.2. As the results of typing 1 strain falls in A1, 33 in A2, 27 in A4, 28 in A5, 20 in A6, 2 in A8 and 9 in A10 types of Dalldorf's classification. Of 71 strains isolated from herpangina patients 26 belonged to A2, 10 to A4, 25 to A5 and 10 to A6 types.3. In three herpangina patients two serological types were isolated at the same time from their stools.4. Some discussions are made on the type distribution of Group A Coxsackie viruses in Japan in comparison with that of some other countries. Some considerations are also made on the relationship between the serological types of viruses and the clinical features caused by them, especially from the viewpoint of herpangina.