Volume s1-31, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Numerous studies on the distribution of have been made in recent years. For the most part these emphasize the predominance of () types, the paucity of (Shiga), the fluctuating, but usually considerable incidence of and the rarity of the types of Boyd and Sachs (2–7). Weil (8) presented an excellent summary of results compiled to 1946. isolated in this laboratory prior to 1949 (unpublished data) demonstrated that serotype II was the most common (approximately 40 per cent of those isolated) followed closely by (which comprised about 35 per cent of the isolates). Barksdale (9) has indicated, without reference to incidence, those species which have been isolated in Japan. They included virtually all of the important types.

During the period from January 1949 to June 1950, the 406th Medical General Laboratory located in Tokyo, Honshu, Japan, isolated or was called upon to identify 499 cultures.


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