<prompt> Regarding Clostridium perfringens gas gangrene, false is -Common cause of gas gangreneNagler reaction positiveMost common toxin is hyaluronidaseFood poisoning strain of Cl. perfringens produces heat resistant spores  <response>: 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. 