Deoxyribonucleic acid-deoxyribonucleic acid hybridizations were performed with 31 vancomycin-resistant gram-positive cocci isolated from human sources. A total of 14 human isolates exhibited high levels of homology with subsp. NCDO 523 (T = type strain), whereas 2 strains were genetically closely related to NCDO 533. Nine human isolates formed a tight homology group with an atypical strain (strain NCIB 3351), whereas two isolates (together with four strains from food) were found to be highly related to sp. strain NCDO 768. Two new species, and , are proposed for these homology groups. The type strains of and are strains NCDO 1837 and NCDO 768, respectively.


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