特異性:This item is specific for Clostridium difficile toxin A. No reaction is observed with the following organisms:Clostridium difficile toxin B, tetanus toxoid, Pseudomonas aeruginosa and Yersinia enterocolitica Clostridium difficile is a gram-positive motile bacterium which is the leading cause of diarrhoea in developed countries. The incidence of disease in humans varies greatly with age, spore density and the administration of antibiotics. Toxin A (TcdA) is a large exotoxin which is an essential virulence factor for C. difficile infection. TcdA has a molecular weight of 308kD and is a glucosyltransferase, which irreversibly inactivates the Ras family of small GTPases to disrupt many important signalling pathways.