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The AmpliVue Clostridium difficile assay and a glutamate dehydrogenase (GDH)-illumigene algorithm were evaluated using 308 diarrheal stool specimens of patients suspected of having C. difficile infection. Compared to the enriched toxigenic culture method, the sensitivities, specificities, and positive and negative predictive values of the AmpliVue C. difficile assay and the GDH-illumigene-based algorithm were 91.7% (95% confidence interval [CI], 76.4 to 97.8), 100% (95% CI, 98.3 to 100), 100% (95% CI, 87 to 100), and 98.9% (95% CI, 96.6 to 99.7), respectively.
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Eckert et al. (2014) studied this question.
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