Which organism is non-lactose fermenting and hydrogen sulfide positive, motile, with citrate positive and indole negative?

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Multiple Choice

Which organism is non-lactose fermenting and hydrogen sulfide positive, motile, with citrate positive and indole negative?

This pattern of biochemical traits points to Edwardsiella tarda. It does not ferment lactose, yet it produces hydrogen sulfide, and it is motile. It uses citrate as a sole carbon source (citrate positive), and it does not produce indole (indole negative). The combination of non-lactose fermentation with H2S production, motility, citrate positivity, and indole negativity is distinctive for this organism, helping distinguish it from the others listed, which do not fit all these traits together.

This pattern of biochemical traits points to Edwardsiella tarda. It does not ferment lactose, yet it produces hydrogen sulfide, and it is motile. It uses citrate as a sole carbon source (citrate positive), and it does not produce indole (indole negative). The combination of non-lactose fermentation with H2S production, motility, citrate positivity, and indole negativity is distinctive for this organism, helping distinguish it from the others listed, which do not fit all these traits together.

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