occurrence of beta2 toxigenic clostridium perfringens isolates with different toxin types in iran

clostridium perfringens is an important cause of enteric diseases in both human and animals. the bacteria produce several toxins which play key roles in the pathogenesis of diseases and are classified into five toxin types, on the basis of the differential production of alpha, beta, epsilon and iota toxins. in this study a single pcr assay was developed and used for detection of cpb2 gene to identify the beta2 harboring isolates among different types of c. perfringens isolated from animal enteric diseases in iran. it was found that cpb2 presents among c. perfringens isolates types a, b, c and d with 54.5% (6/11), 62% (13/21), 42.8% (6/14), 69.25% (9/13), respectively. totally 34 of 59 (56.7%) isolates screened by pcr were cpb2-positive. this is the first report of cpb2 positive isolates of c. perfringens causing enteric diseases of animals in iran. further studies to demonstrate the exact role of beta2 toxin in pathogenesis of the bacterium is suggested.