1887

Abstract

Five Gram-negative bacterial strains, oxidase-positive, motile by means of more than one polar flagella, facultative anaerobe, arginine dihydrolase-negative, lysine- and ornithine decarboxylase-positive, sensitive to the vibriostatic agent O/129, were isolated from a flow-through rotifer culture system in Gent, Belgium, and previously characterized by fluorescent amplified fragment length polymorphism. Comparison of the 16S rDNA sequence of strain LMG 21460 indicated close relationships (∼99 % similarity) to , , and . However, DNA hybridization experiments revealed similarity values below 70 % with its closest species and . Additionally, the analysed strains differ from related species by the utilization of melibiose and production of acid from -arabinose and amygdalin. Among the strains analysed, differences were observed in some phenotypic characters, particularly susceptibility to ampicillin, polymyxin B and amikacin, and urease activity. The major fatty acids identified were 16 : 0, 18 : 1ω7, 14 : 0, 12 : 0 3-OH and 18 : 0. sp. nov. is proposed, with type strain LMG 21460 (=CAIM 577); it has a DNA G+C content of 44·5±0·01 mol%.

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2003-01-01
2020-07-02
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