Moderate

Growth factor needed for Salmonella_________________?

Correct answer: A. Tryptophan

  • A. Tryptophan
  • B. Niacin
  • C. B-12
  • D. Citrate

Explanation

Salmonella requires tryptophan as a growth factor in certain culture conditions. Niacin and vitamin B12 are not the characteristic requirement tested here, while citrate is a substrate used in biochemical identification.

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