This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Regarding Clostridium perfringens gas gangrene, false is - \nSelect and explain. \nA. Common cause of gas gangrene, B. Nagler reaction positive, C. Most common toxin is hyaluronidase, D. Food poisoning strain of Cl. perfringens produces heat resistant spores', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is. 'c' i.e., Most common toxin is hyalronidase . The most common and most impoant toxin produced by CL perfringensis a- toxin (lecithinase). Clostridium perfringens food poisoning . Some strains of type A Cl. perfringens produce poisoning. They are characterised by the marked heat resistance of their spores and the feeble production of alpha and theta toxins. . Food poisoning is due to production of heat labile enterotoxin. . The food sources primarily involved are meat, meat products and poultry. . Incubation period is 8-24 hours. . Nausea, diarrhea and epigastric pain are the usual symptoms. Fever and vomiting are uncommon.", 'role': 'assistant'}]