Growth factor required for salmonella:
Tryptophan
Niacin
Vitamin B12
Citrate
Salmonella require tryptophan as an essential growth factor. Also remember: Legionella require Iron and Cysteine Mycoplasma require sterols Ureaplasma require sterols and urea Halophilic Vibrio (parahemolyticus) require salt.
Systemic Bacteriology (Haemophilus, Yersinia, Spirochaetes, Ricketssia, Chlamydia, Mycoplasma and Miscellaneous Bacteria)