Bacillus coagulans is a species of Bacillus bacteria, which can contaminate canned food and gives it a flat sour taste. This includes foods that are normally too acidic for most bacteria; B. coagulans can grow at a pH as low as 4.2.

Properties: Gram positive (may appear Gram-negative when entering the stationary phase of growth), as all other species in genus Bacillus B. coagulans forms endospores, which are resistant to chemical and physical agents. Temperature optimum for growth is 37 degrees C. Species is motile. Found in soil, canned acid food and also in medicated creams and antacids.

iMVic Tests VP and MR (methyl-red) tests are positive. Citrate and Nitrate tests are negative.

Bacillaceae

Bacillus coagulans