Abstract
A new strain of luminescent marine bacteria of the genus Aliivibrio (formerly Vibrio) was isolated from the intestines of a goby Cottida sp. (Sea of Okhotsk basin; the strain was marked as KCh1). The basic conditions of growth on laboratory media were determined for the strain. Strain KCh1 was shown to be a psychrophilic bacterium with an optimal growth temperature of approximately 15°C. The nucleotide sequence of the 16S rRNA gene was determined and shown to be almost identical to the 16S rRNA gene sequence of Aliivibrio logei and A. salmonicida but considerably different from that of A. fischeri. The biochemical characteristics (nitrate reduction, lysine decarboxylation, and D-galactose fermentation) of strain KCh1 matched those of A. logei and A. fischeri strains. An antibioticogram for strain KCh1 was determined. The lux operon of the strain was cloned in Escherichia coli cells and partially sequenced, the results show a high homology with the lux operon of A. salmonicida.
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