Clinical and Microbiological Characteristics of Hospitalized Adults Aged ≤ 45 Years With <i>Clostridioides</i> (Formerly <i>Clostridium</i>) <i>difficile</i> Infection: A Prospective Observational Cohort Study From Hungary

Studies focusing on young adults with Clostridiodes (formerly Clostridium) difficile infection (CDI) are scarce. Our objective was to assess characteristics and outcomes of CDI among hospitalized young adults between the ages of 18-45 years at diagnosis, compared to a subcohort of randomly selected older patients aged > 45 years. We performed a prospective, observational cohort study by enrolling and stratifying 234 consecutive cases of first/recurrent CDI at our tertiary referral center between 2015 and 2019. At 30 days post-treatment initiation, young adults had a higher clinical cure (99.1% vs. 81.2%; p < 0.01) and lower all-cause mortality (0.9% vs. 16.4%; p < 0.01). Metronidazole was a common first-line choice (77.8% vs. 46.2%; p < 0.01) with similar relapse rates (6.0% vs. 5.1%, p = 0.56). We conclude that CDI in patients aged between 18 and 45 years was associated with fewer complications and higher clinical cure with metronidazole, compared to older patients.