Phenotypic and phylogenetic studies were performed on an unknown Gram-positive catalase-negative coccus isolated from human urine. Comparative 16S rRNA gene sequencing demonstrated that the organism represents a new subline within the genus Aerococcus. The unknown bacterium was readily distinguished from the three currently recognized Aerococcus species, Aerococcus christensenii, Aerococcus urinae and Aerococcus viridans, by biochemical tests and electrophoretic analysis of whole-cell proteins. Based on phylogenetic and phenotypic evidence, it is proposed that the unknown bacterium from urine be classified as Aerococcus urinaehominis sp. nov. The type strain of Aerococcus urinaehominis is CCUG 42038bT (= CIP 106675T).


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