a MRS agar containing 1.5% bile solution (10% w/v) incubated at 37 C for 72 h under anaerobic conditions.
b MRS agar containing clindamycin (0.5 ppm) incubated at 37 C for 72 h under anaerobic conditions.
c MRS agar containing 1% sorbitol (solution) incubated at 37 C for 72 h under anaerobic conditions.
d MRS agar at pH adjusted to 5.2 incubated at 45 C for 72 h under anaerobic conditions.
e Reinforced Clostridium agar at pH adjusted to 5.3 incubated at 45 C for 72 h under anaerobic conditions.
f M17 agar containing 5% lactose solution (10% w/v) incubated at 45 C for 72 h under aerobic conditions.
g ST agar incubated at 30 C for 72 h under aerobic conditions