Certified Professional Food Safety (CP-FS) Practice Exam

What type of bacteria is Clostridium perfringens classified as?

1. Aerobic bacteria

2. Facultative anaerobic bacteria

3. Spore-forming anaerobic bacteria

4. Obligate anaerobic bacteria

The correct answer is: Spore-forming anaerobic bacteria

Clostridium perfringens is classified as spore-forming anaerobic bacteria because it has the ability to form spores, which are a dormant and resilient form that can survive in harsh conditions. This characteristic is crucial for its survival in environments where oxygen is scarce. Being anaerobic means that Clostridium perfringens thrives in environments devoid of oxygen, making it capable of growing in the intestines of humans and animals, as well as in improperly stored food. The ability to form spores allows it to remain dormant until conditions become favorable for growth, such as in food that is kept warm for extended periods. This bacterium is well-known for its role in food poisoning, especially in situations where cooked foods are kept warm for too long, allowing spores to germinate and produce toxins. Understanding the classification helps in food safety management, particularly in preventing outbreaks associated with this pathogen.