A fast-growing anaerobe behind one of the commonest causes of food poisoning, and behind gas gangrene in damaged tissue. Explore its illustrative 3D model, human context, and sources.
PHAC describes C. perfringens as non-motile, anaerobic, Gram-positive spore-forming bacteria whose vegetative cells are rod shaped and pleomorphic and occur in pairs or short chains, forming highly resistant spores. Seven toxigenic types A to G are recognised, of which A, C and F strains are pathogenic for humans; alpha toxin is produced by all strains. PHAC estimates 1 million cases of foodborne illness every year in the United States and 5 million cases in the European Union, and 1,000 to 3,000 gas gangrene cases reported yearly in the United States. The same species therefore produces an illness that usually resolves within 24 hours and a rapidly destructive wound infection, depending on toxin type and where it grows.
Most C. perfringens illness is short-lived food poisoning that PHAC describes as usually mild and self-limiting in healthy individuals, with symptoms resolving within 24 hours. Clostridial myonecrosis is a different disease with mortality PHAC puts at 5 to 30% with prompt treatment and almost 100% without it. The two must not be conflated: the gas-gangrene figures do not describe the risk of a meal.
Clostridium perfringens · A representative short pair of vegetative rods. Spores are omitted because they are rarely visible in the usual vegetative view. This is a species-informed teaching diagram; colours, proportions, envelope spacing and internal detail are illustrative. The model uses muted illustrative colours; stains, colony pigments and microscopy colourization are not natural cell colours. Anatomy is enlarged for phone viewing. Morphology reference: Clostridium perfringens · pathogen safety data sheet.
Source check: 2026-09-20. Educational content; independent scientific review remains pending.