The potentially lethal intoxication type of food poisoning often associated with improperly canned food is caused by which organism?

The potentially lethal intoxication type of food poisoning often associated with improperly canned food is caused by which organism?

• A. Bacteroides fragilis
• B. Clostridium botulinum
• C. Clostridium perfringens
• D. Clostridium septicum

Answer: (B)

Botulism from improperly canned foods comes from Clostridium botulinum, which can grow in anaerobic, low-acid environments found in home-canned goods and release botulinum toxin. This toxin is an extremely potent neurotoxin that blocks acetylcholine release at neuromuscular junctions, causing a descending, symmetric paralysis that can progress to respiratory failure if not treated with antitoxin and supportive care. That combination—preformed toxin in canned foods leading to a life-threatening neurotoxic illness—is what makes this organism the classic cause of this type of food poisoning. The other organisms listed are associated with different clinical scenarios: Bacteroides fragilis is a gut anaerobe linked to intra-abdominal infections; Clostridium perfringens more often causes food poisoning from reheated meats or gas gangrene; Clostridium septicum is associated with gas gangrene and malignancy rather than canned-food poisoning.

Botulism from improperly canned foods comes from Clostridium botulinum, which can grow in anaerobic, low-acid environments found in home-canned goods and release botulinum toxin. This toxin is an extremely potent neurotoxin that blocks acetylcholine release at neuromuscular junctions, causing a descending, symmetric paralysis that can progress to respiratory failure if not treated with antitoxin and supportive care. That combination—preformed toxin in canned foods leading to a life-threatening neurotoxic illness—is what makes this organism the classic cause of this type of food poisoning. The other organisms listed are associated with different clinical scenarios: Bacteroides fragilis is a gut anaerobe linked to intra-abdominal infections; Clostridium perfringens more often causes food poisoning from reheated meats or gas gangrene; Clostridium septicum is associated with gas gangrene and malignancy rather than canned-food poisoning.