Background: Reduction in the use of fluoroquinolone antibiotics has been associated with reductions in Clostridioides difficile infections (CDIs) due to fluoroquinolone-resistant strains.
Objective: To determine whether facility-level fluoroquinolone use predicts healthcare facility-associated (HCFA) CDI due to fluoroquinolone-resistant 027 strains.
Methods: Using a nationwide cohort of hospitalized patients in the Veterans' Affairs Healthcare System, we identified hospitals that categorized >80% of CDI cases as positive or negative for the 027 strain for at least one-quarter of fiscal years 2011-2018. Within these facilities, we used visual summaries and multilevel logistic regression models to assess the association between facility-level fluoroquinolone use and rates of HCFA-CDI due to 027 strains, controlling for time and facility complexity level, and adjusting for correlated outcomes within facilities.
Results: Between 2011 and 2018, 55 hospitals met criteria for reporting 027 results, including a total of 5,091 HCFA-CDI cases, with 1,017 infections (20.0%) due to 027 strains. Across these facilities, the use of fluoroquinolones decreased by 52% from 2011 to 2018, with concurrent reductions in the overall HCFA-CDI rate and the proportion of HCFA-CDI cases due to the 027 strain of 13% and 55%, respectively. A multilevel logistic model demonstrated a significant effect of facility-level fluoroquinolone use on the proportion of infections in the facility due to the 027 strain, most noticeably in low-complexity facilities.
Conclusions: Our findings provide support for interventions to reduce use of fluroquinolones as a control measure for CDI, particularly in settings where fluoroquinolone use is high and fluoroquinolone-resistant strains are common causes of infection.
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