For the proper classification of the and , the serological relationship should be considered. In a serological comparison using strains of and against polyvalent antiserum, adsorbed polyvalent antiserum and serotypes 1–10, it was found that one of the five strains was serologically the same as , type 7 The other four strains of and were agglutinated by adsorbed polyvalent antiserum and share partial antigens with certain serotypes of Henriksen (1952) suggested further study was necessary before var. could be included in the genus In the present study, 57% of the strains studied were agglutinated by polyvalent antiserum and var. (pool of 3 sera). The strain of var. included was agglutinaed only by antiserum.


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