Diagnosis
- history of associated antibiotics
- demonstration of Clostridium difficile toxin in faeces using cell-culture assay or immunoassay. Note that a stool culture for C. difficile is a less efficient method for diagnosis since some strains of C. difficile are non-toxogenic and hence non-pathogenic.
- sigmoidoscopy or proctoscopy - punctate, adherent yellow-white plaques on an inflamed rectal mucosa.
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