Fifty-two strains of species were isolated from oral cavities or lesions contaminated with feline oral flora from 49 different cats. Forty-five strains were from purulent lesions, while the remaining seven strains came from the normal gingivae of three cats less than 6 months old. Of 36 strains which were phenotypically like , 29 showed an average level of deoxyribonucleic acid (DNA) homology of 87% with the type strain of , strain ATCC 25533 (isolated from a cat). The remaining seven strains showed an average level of DNA relatedness to of 53%. An additional eight strains, which were identified as by biochemical tests, had polyacrylantide gel electrophoresis patterns unlike those of and an average level of DNA homology with ATCC 25286(T = type strain) of 25%. These strains showed an average level of DNA homology with ATCC 35896of 96%, although the results of polyacrylamide gel electrophoresis and biochemical tests obtained with the isolated strains were unlike the results obtained with ATCC 35896. Four strains isolated from cats had biochemical characteristics of ATCC 25586. The average level of intragroup DNA homology of these strains with ATCC 25586was 66%, although their polyacrylamide gel electrophoresis patterns differed somewhat from those of the type strain. Four strains isolated from cats were identified as on the basis of phenotypic tests; they had an average level of homology with the type strain of , strain ATCC 25832, of 17% and showed low degrees of relatedness with DNAs from all other type strains tested.


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