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Nucleic Acid Homologies of Some Vancomycin-Resistant Leuconostocs and Description of Leuconostoc citreum sp. nov. and Leuconostoc pseudomesenteroides sp. nov.

1989; Microbiology Society; Volume: 39; Issue: 3 Linguagem: Inglês

10.1099/00207713-39-3-279

1465-2102

J. A. E. FARROW, Richard R. Facklam, M. D. COLLINS,

Mycobacterium research and diagnosis

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 Leuconostoc mesenteroides subsp. mesenteroides NCDO 523T (T = type strain), whereas 2 strains were genetically closely related to Leuconostoc lactis NCDO 533T. Nine human isolates formed a tight homology group with an atypical L. mesenteroides strain (strain NCIB 3351), whereas two isolates (together with four strains from food) were found to be highly related to Leuconostoc sp. strain NCDO 768T. Two new species, Leuconostoc citreum and Leuconostoc pseudomesenteroides, are proposed for these homology groups. The type strains of L. citreum and L. pseudomesenteroides are strains NCDO 1837 and NCDO 768, respectively.