What is the difference between the toxins produced by Clostridium perfringens that cause food poisoning versus gas gangrene?

• A. Gas gangrene is due to enterotoxin; food poisoning due to neurotoxin
• B. Food poisoning is due to preformed heat-stable enterotoxin causing watery diarrhea; gas gangrene is due to tissue-destructive toxins (alpha-toxin) produced in wounds
• C. Both due to the same toxin but different patient ages
• D. Food poisoning due to toxin A; gas gangrene due to toxin B

Answer: (B)

Clostridium perfringens causes two very different toxin-related problems: a preformed toxin in food that leads to food poisoning, and toxins produced in tissue in wounds that cause gas gangrene. The best choice says that food poisoning results from a preformed heat-stable enterotoxin in contaminated food, which triggers watery diarrhea and cramps after ingestion. In contrast, gas gangrene comes from tissue-destructive toxins produced in the injured, low-oxygen environment of a wound, with alpha-toxin (a phospholipase, or lecithinase) driving the severe muscle damage and gas formation.

The enterotoxin is made during sporulation in the intestine and is heat-stable, so reheating the food may not eliminate it, and symptoms are typically watery diarrhea with abdominal cramps within about a day. For gas gangrene, the toxins are generated in the necrotic tissue of a wound, leading to rapid local destruction of tissue, severe pain, swelling, and often gas under the tissues, requiring urgent surgical and antibiotic treatment.

This differs from the incorrect options that misattribute the toxins (neurotoxin or a single shared toxin), or apply toxin labels that belong to other organisms (like toxin A vs toxin B in C. difficile).