Objective: To estimate the benefits of iterative prevalence surveys in detecting trends of hospital-acquired infections (HAIs).
Methods: On the basis of the French protocol for national prevalence studies, HAI data of 15 consecutive annual surveys performed at the same period by the same group of investigators was gathered in a single database to describe the trend of HAIs in a University Hospital over a 15-year period.
Results: A total of 20,401 patients were included. Overall, the prevalence of patients presenting with at least one HAI acquired in our University Hospital was 5.1% [95% CI, 4.8-5.4%]. The prevalence of HAIs and antimicrobial drug use significantly decreased over time (P<0.01).
Conclusion: Despite limitations, repeated prevalence surveys can be a useful tool for promoting control measures to better prevent HAIs.
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