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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