They liquify gelatin, digest casein and cooked meat, produce H 2 S and lipase but not indole or urease. They can ferment many carbohydrates but not lactose, mannitol, melibiose and salicin. Products are mainly acetic and butyric acids. They liquify gelatin, but do not digest casein and cooked meat, produce H 2 S, lipase, indole or urease. They ferment glucose, glycerol, inositol, ribose and xylose and are variable on fructose, galactose, maltose and melibiose.
Products are mainly propionic and butyric acids.
They liquify gelatin, but may only barely digest casein and cooked meat, they do not produce H 2 S, indole or urease, but produce lipase. They do not ferment any carbohydrates, but can use citrate and some amino acids as energy source. They liquify gelatin, and digest casein and cooked meat, they produce H 2 S, but not indole, lipase or urease. Some of the toxins such as C 1 and D are bacteriophage induced, while C 2 is not. I and II share antigens.