The Alkalescens-Dispar Group

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Abstract
A partial review of the literature on the alkalescens-dispar group (A-D group) is presented. It is proposed that the antigenic schema of Frantzen should be adopted for use in the identification and reporting of these bacterial types. The A-D schema affords an accurate and practical method which laboratory personnel may utilize without reference to the problems of the taxonomic position of its members. Data are presented which confirm the results of Frantzen as regards the O antigens of the members of the alkalescens-dispar group and their relationships to the coli group.