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Int J Syst Evol Microbiol. 2001 Sep;51(Pt 5):1773-82.

Classification of metal-resistant bacteria from industrial biotopes as Ralstonia campinensis sp. nov., Ralstonia metallidurans sp. nov. and Ralstonia basilensis Steinle et al. 1998 emend.

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Laboratorium voor Microbiologie, Universiteit Gent, Belgium.


Thirty-one heavy-metal-resistant bacteria isolated from industrial biotopes were subjected to polyphasic characterization, including 16S rDNA sequence analysis, DNA-DNA hybridizations, biochemical tests, whole-cell protein and fatty-acid analyses. All strains were shown to belong to the Ralstonia branch of the beta-Proteobacteria. Whole-cell protein profiles and DNA-DNA hybridizations revealed two clearly distinct groups, showing low similarity to known Ralstonia species. These two groups, of 8 and 17 isolates, were assigned to two new species, for which the names Ralstonia campinensis sp. nov. and Ralstonia metallidurans sp. nov. are proposed. The type strains are WS2T (= LMG 19282T = CCUG 44526T) and CH34T (= LMG 1195T = DSM 2839T), respectively. Six isolates were allocated to Ralstonia basilensis, which presently contains only the type strain; an emendation of the latter species description is therefore proposed.

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