Abstract
SUMMARY: An obligately anaerobic sulphate-reducing vibrio (NCIB 8382) isolated from soil from Singapore differs from known species of sulphate-reducing bacteria. The organism is relatively large, with one or two flagella, Gram-negative, lacks hydrogenase and pigments characteristic of Desulphovibrio desulphuricans, though an insoluble cytochrome is present. It grows with lactate or pyruvate, but is unable to metabolize acetate, propionate or butyrate; it reduces sulphate, sulphite or thiosulphate but not tetrathionate. Sporulation is rare but has been observed. The name Desulphovibrio orientis is proposed for this organism.
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