Table 2.

Evaluation of Xpert Clostridium difficile and VIDAS Clostridium difficile A & B assays for the detection of toxigenic Clostridium difficile isolates

^*One presumptive 027/NAP1/BI strain identified as ribotype 078 on PCR ribotyping as well as a 39-base pair deletion and a point mutation at position 184 in tcdC; ^†Four specimens showed positive results by enrichment culture; ^‡One "error" in the Xpert CD assay: no growth on anaerobic culture and negative on VIDAS-CDAB.

Abbreviations: Xpert CD, Cepheid Xpert Clostridium difficile assay; VIDAS-CDAB, VIDAS Clostridium difficile Toxin A&B assay; A, toxin A; B, toxin B; CDT, C. difficile binary toxin; 027, presumptive 027/NAP1/BI strain.