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“Background Clostridium perfringens is
commonly found in the gastrointestinal (GI) tract of humans, animals, soils, freshwater sediments and sewage. It can cause various diseases in humans, including food poisoning, antibiotic-associated diarrhea, sporadic diarrhea, internal abscesses, and gas gangrene and also various animal diseases [1–5]. C. perfringens strains all are prolific toxin producers and are classified based on their toxin formation. Various C. perfringens toxins denature cellular components of mammalian cells and are implicated in virulence and pathogenicity. Among these toxins are α-toxin (phospholipase C, PLC) and θ-toxin (perfringolysin O, PFO), which are essential for gas gangrene pathogenesis. Other toxins or hydrolytic enzymes may be involved in destruction of connective tissue or spread of bacteria in infected tissues [4, 6, 7]. C. perfringens, although a commensal, can cause life threatening infections and is implicated in inflammatory bowel diseases [8–10]. In a survey of Clostridium species bacteremia, in a Canadian hospital between 2000–2006, C. perfringens was shown to have caused 42% of the cases, which was more than any other Clostridium species [11]. It causes nearly a million cases of food borne illness each year in the United States [1]. Bacteria from the GI tract, including C.