Abstract
An epidemic of meningitis caused by ECHO virus type 4, was reported in many areas of Japan during the summer and early autumn of 1964. (1) During May to August of 1965, aseptic meningitis was prevalent chiefly in the northern parts of Kyushu. It was revealed that this was an epidemic of ECHO virus type 4. The present paper reports the results of study of this epidemic.The study is divided into the following parts:(1) Laboratory data from aseptic meningitis cases.(2) Distribution of cases according to age, sex, geography and season.(3) Antigenic and plaque characteristics of isolated ECHO virus type 4 strains.
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