Table 2. The sensitivity and specificity of various testing modalities available clinically to diagnose CDI.

Methods/Assay	Sensitivity (% range)	Specificity (% range)
Cell Culture Cytotoxicity Neutralization Assay	33-86	97-100
Toxin A/B EIA	41-86	91-99
GDH EIA antigen	88-95	94-98
NAAT	62-100	89-100