1887

Abstract

Two strains of Gram-negative, facultatively anaerobic, slightly halophilic bacteria, isolated from healthy gilthead sea bream () cultured in Spanish Mediterranean fish farms, were different from their closest relatives, and , by phenotypic, phylogenetic and genomic standards. The strains were negative for decarboxylase tests and lacked extracellular hydrolytic activities, but were able to ferment -mannitol, sucrose, cellobiose and -gluconate, among other carbohydrates. The major cellular fatty acids were C and C , in agreement with other species of the genus . Their 16S rRNA gene sequences were 98.4 and 97.2 % similar to those of the type strains of and , and the similarities using other housekeeping genes (, , , and ) and indices of genomic resemblance (average nucleotide identity and estimated DNA–DNA hybridization) between the isolates and those type strains were clearly below intraspecific levels, supporting the recognition of the strains as members of a separate novel species. Thus, we propose the name sp. nov., with DCR 1-4-2 ( = CECT 8603 = KCTC 42287) as the type strain.

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2015-06-01
2019-10-19
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