Bacteroides salivosus sp. nov., an Asaccharolytic, Black-Pigmented Species from Cats

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Abstract
A new species, Bacteroides salivosus sp. nov., is proposed for black-pigmented, asaccharolytic Bacteroides strains from cats, isolated from subcutaneous abscesses and empyemas, as well as from gingival margins of normal mouths. The bacterium is an obligately anaerobic, gram-negative, brown- or black-pigmented, asaccharolytic, nonmotile, nonsporeforming rod that does not grow in 20% bile and has a guanine-plus-cytosine content of 42 to 44 mol%. It has 12% deoxyribonucleic acid homology with the human type strain of Bacteroides gingivalis (ATCC 33277T) and 1% deoxyribonucleic acid homology with the human type strain of Bacteroides asaccharolyticus (ATCC 25260T). Strain VPB 157 (NCTC 11632T) is the type strain. Unlike B. gingivalis, B. salivosus produces catalase, and the colonies of the type strain fluoresce at 24 and 48 h, although some other strains do not fluoresce. It does not agglutinate sheep erythrocytes. Unlike either B. asaccharolyticus or Bacteroides endodontalis, it has trypsinlike activity and produces large quantities of phenylacetic acid.

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