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* 1. The term used to describe a disturbed colonic microflora that leaves patients susceptible to C. difficile infection via a loss of colonization resistance is:

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* 2. Risk factors for CDI include all of the following except:

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* 3. Clinical trials demonstrate that, compared to vancomycin, the use of fidaxomicin in the treatment of CDI resulted in significantly:

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* 4. Clinical evidence supports the use of each of the following to decrease the risk of CDI recurrence rates except:

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* 5. According to the latest IDSA/SHEA guidelines, which of the following is not an appropriate treatment choice for a patient with a first recurrent episode of CDI?

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* 6. Clinical trials demonstrate that antibodies against which of the following toxins can reduce the rate of recurrence of CDI?

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