Factors Affecting Amine Production by a Selected Strain of Lactobacillus bulgaricus

ABSTRACT Lactobacillus bulgaricus‐52 showed maximum growth and amine production in MRS broth in 24 hr at 37°C. The optimum pH for the production of histamine, tyramine, and tryptamine by L. bulgaricus‐52 was 5.0. Highest yields of the different amines were obtained in the absence of NaCI in the growth medium. A concentration of even 0.5% NaCI had a slight inhibitory affect on the synthesis of amines. A similar trend was observed in terms of amine production by L bulgaricus‐52 in milk samples held at 37°C for different time intervals.