Which tests should be recommended for rapid diagnosis of C. difficle
Tests should not be performed for asymptomatic patients & do not perform repeat testing (within 7 days) during the same episode of diarrhoea .
Sensitivity and specificity of the diagnostic methods for CDI
Sensitivity |
Specificity |
|
|---|---|---|
| Glutamate dehydrogenase [GDH] plus C. difficile toxic A & B assays | 60-90% | 76-98% |
| Xpert C. difficile assay (Xpert CD assay; Cepheid ) | 90-100% | 94.6-100% |