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Vibrio fortis sp. nov. and Vibrio hepatarius sp. nov., isolated from aquatic animals and the marine environment

¹ Laboratory for Microbiology, Ghent University, K. L. Ledeganckstraat 35, Ghent 9000, Belgium
² BCCM/LMG Bacteria Collection, Ghent University, K. L. Ledeganckstraat 35, Ghent 9000, Belgium
³ National Center for Marine and Aquaculture Research, Guayaquil, Ecuador

Correspondence
F. L. Thompson
Fabiano.Thompson{at}ugent.be

In this study, the taxonomic positions of 19 Vibrio isolates disclosed in a previous study were evaluated. Phylogenetic analysis based on 16S rDNA sequences partitioned these isolates into groups that were closely related (98·8–99·1 % similarity) to Vibrio pelagius and Vibrio xuii, respectively. DNA–DNA hybridization experiments further showed that these groups had <70 % similarity to other Vibrio species. Two novel Vibrio species are proposed to accommodate these groups: Vibrio fortis sp. nov. (type strain, LMG 21557^T=CAIM 629^T) and Vibrio hepatarius sp. nov. (type strain, LMG 20362^T=CAIM 693^T). The DNA G+C content of both novel species is 45·6 mol%. Useful phenotypic features for discriminating V. fortis and V. hepatarius from other Vibrio species include production of indole and acetoin, utilization of cellobiose, fermentation of amygdalin, melibiose and mannitol, -galactosidase and tryptophan deaminase activities and fatty acid composition.

Published online ahead of print on 28 February 2003 as DOI 10.1099/ijs.0.02658-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rDNA sequences of strains LMG 21557^T and LMG 20362^T are AJ514916 and AJ345063, respectively.

Tables of variable features among strains of V. fortis and V. hepatarius are available as supplementary material in IJSEM Online.

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