Abstract
The results obtained in the mixed culture of Lactobacillus acidophilus and Bacillus aneurinolyticus, indicate that the culture of the former has almost no influence on the growth and the thiaminase activity of the latter. In the mixed culture of B. aneurinolyticus and Streptococcus faecalis, the latter inhibits the growth of the former at pH 3.8〜4.2. However, no remarkable interactions are observed between these two organisms cultivated in phosphatebuffered media (pH 6.0〜6.8), and the thiaminase activity of B. aneurinolyticus is not suppressed by the presence of S. faecalis. In the mixed culture of B. thiaminolyticus and S. faecalis, the latter inhibits both of the growth and the thiaminase activity of the former at pH 4.0〜5.0. S. faecalis, grown in phosphate-buffered media (pH 5.8〜6.0) has, on the contrary, no effect on the growth of B. thiaminolyticus.
