Treating Initial and Recurrent C. difficile: A Retrospective Analysis of 100 Referred Patients.

Area of Science:

• Infectious Diseases
• Gastroenterology
• Clinical Practice Research

Background:

• Treatment guidelines for Clostridioides difficile infection (CDI) exist but adherence, especially for recurrent CDI, is not well understood.
• Recurrent CDI poses significant challenges in clinical management and treatment adherence.

Purpose of the Study:

• To assess adherence to established treatment guidelines for CDI in a tertiary care setting.
• To evaluate diagnostic accuracy and treatment appropriateness for initial versus recurrent CDI episodes.
• To determine the impact of specialist referral on patient outcomes.

Main Methods:

• Retrospective chart review of 100 patients with 350 CDI episodes (115 initial, 235 recurrent) treated between 2018 and 2023.
• Comparison of prescribed treatments against IDSA/SHEA and ACG recommendations.
• Analysis of referring diagnoses versus final specialist diagnoses, including misclassified colonization.

Main Results:

• Guideline adherence was significantly lower for recurrent CDI (41.3%) compared to initial CDI (70.4%).
• Over half of non-adherent recurrent cases received inappropriate standard antibiotic regimens.
• Specialist review corrected diagnoses in 12.0% of episodes, with a notable increase in identified colonization (2.6% to 8.9%).
• Misdiagnosed colonization had a 6.2-fold higher treatment failure rate than confirmed CDI.

Conclusions:

• Guideline adherence for recurrent CDI is inadequate in pre-referral settings, highlighting a gap in care.
• Diagnostic misclassification, particularly of colonization, is a common issue in recurrent CDI cases.
• Early involvement of specialists in complicated CDI cases can enhance diagnostic accuracy and optimize treatment strategies.