Optimum growth temperatures were determined for nine strains of Streptococcus thermophilus and ten strains of Lactobacillus bulgaricus, all commercial yogurt or yogurt
starter isolates. Optimum growth temperatures ranged from 35 C to 42 C for S.thermophilus strains, averaging 38.6. Optimum growth temperatures for L.bulgaricus strains ranged from 43 C to...