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🦠 Clostridioides difficile Infection (CDI) Treatment

This tool gives the Clostridioides difficile infection regimen by episode and severity, covering initial, recurrent, and fulminant disease.

Clostridioides difficile Infection (CDI) Treatment

Episode
Severity

When to use

Use to choose fidaxomicin or vancomycin for initial/recurrent CDI, taper-pulse or FMT for multiple recurrences, and high-dose vancomycin + IV metronidazole for fulminant disease.

How it works

Initial (non-severe/severe) → fidaxomicin or oral vancomycin × 10 days. First recurrence → fidaxomicin or vancomycin taper-pulse. Multiple recurrences → taper-pulse/rifaximin/FMT. Fulminant → high-dose vancomycin + IV metronidazole + surgery.

Key points

  • Metronidazole is no longer a first-line agent and is reserved for non-severe disease only when a preferred drug is unavailable. (original synthesis · not guideline verbatim)
  • A test of cure is not performed, since asymptomatic carriage can persist.
  • Bezlotoxumab may be added to reduce recurrence in high-risk patients.

References

Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.

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