Spore 형성하는 Gram (+) 혐기균- Worldwide distribution- Infections range : localized wound infection~ overwhelming ... EIA for C. difficile toxin A & B; Rapid but less sensitive than cell cytotoxin assayGood specificity ... (99-100%) Diagnostic sensitivity (89-90%)4시간 이내에 결과 알 수 있음, 기술적으로 간단함.5. 2-step method : lack of datastep