All of the following are true about Clostridium perfringens, EXCEPT:
Clostridium perfringens causes approximately 80% of cases of gas gangrene. All types of C perfringens produce the alpha toxin, a necrotizing, hemolytic exotoxin that is a lecithinase. The spores of some C perfringens strains are often paicularly heat-resistant and can withstand temperatures of 100degC for an hour or more. Smears of tissue and exudate samples show large gram-positive rods. C. perfringens colonies exhibit a double zone of hemolysis on blood agar. Egg yolk agar is used to demonstrate the presence of the lecithinase. Serologic tests are not useful. Ref: Brooks G.F. (2013). Chapter 21. Infections Caused by Anaerobic Bacteria. In G.F. Brooks (Ed), Jawetz, Melnick, & Adelberg's Medical Microbiology, 26e.
It is the commonest cause of gas gangrene
Serologic tests are not useful
The food poisoning spores of Clostridium perfringens are heat resistant
The major enzyme secreted is hyaluronidase