DefinePK

Abstract

Clostridial infection is associated with significant health problems in poultry today, as its enteritis affects intestinal integrity in poultry flocks and may cause considerable losses, which caused by Clostridium perfringens that found all over the world, so fighting this infection is a continuing challenge for the poultry sector. Preventive actions using dedicated products are a valuable solution to maintain healthy gut flora. In this study the prevalence of Clostridium perfringens was detected in different chicken flocks at a rate of 32%. Also, toxin-typing showed presence of cpa, cpb, etx, iap and cpe toxins among the isolates which mainly associated with necrotic enteritis cases. Net-B toxin is a novel toxin that had been recently identi?ed in virulent avian C. perfringens isolates and it presence potentiate the necrotic lesions and destroy the enterocytes. Antimicrobial patterns showed high resistance against most common antibacterial drugs as ?-lactams, aminoglycosides, macrolides and tetracyclines. NetB toxin harboring isolates, originating from diseased broiler, layer and breeder chickens showed the lowest minimum inhibitory concentration MICs values for the penicillin from ?-lactams and tylvalosin from macrolides.