Abstract
Summary
1. Paracolon aerobacters represented by biotype 32011 and related cultures were subjected to antigenic study and comparison. 2. A single biotype was found to be extremely heterogeneous in respect to its thermostable somatic antigens. 3. The occurrence of phase variation in the flagellar antigens of this group is reported and H antigenic relationships are determined. 4. It is pointed out that the antigenic system of classification can be profitably utilized in further investigation of this group.
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