Vibrios are curved, Gram-negative rods commonly found in saltwater. Cells may be linkedend to end, forming S shapes and spirals. They are highly motile with a single polar flagel-lum, non – spore forming, oxidase positive, and can grow under aerobic or anaerobic condi- tions. The cell envelope structure is similar to that of other Gram-negative bacteria. Vibrio cholerae is the prototype cause of a water-loss diarrhea called cholera. Other species causingdiarrhea, wound infections, and, rarely, systemic infection are listed in Table 22 – 2.
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