Comparative study on the time trends of antimicrobial resistance at animal and human hospitals in a shared community
Abstract
Antimicrobial resistance (AMR) is a significant global health threat, with increasing morbidity, mortality, and economic consequences. Human and animal health are linked in the spread and evolution of AMR, particularly due to shared antimicrobial usage in healthcare and agriculture. This study investigates the temporal trends in AMR in both a human and an animal hospital within the same community, focusing on five common drug-bug combinations that overlap between these settings. We aim to explore whether AMR patterns in these two hospitals follow similar trajectories, potentially supporting the hypothesis of cross-species transmission of AMR. Data were retrospectively collected from 2010 to 2022 from East Alabama Medical Center (EAMC) and from 2010 to 2023 from Auburn University Veterinary Teaching Hospital (AUVTH). The analysis focused on Escherichia coli and Klebsiella pneumoniae resistance to cefazolin, ceftriaxone, levofloxacin, and gentamicin, as these were overlapping pairs that had shown statistically significant time trends in preanalysis screening. Bayesian logistic regression was applied to model trends in AMR over time. Generally, the AMR trends in the two hospitals did not align, with decreasing susceptibility in the human hospital and increasing susceptibility in the animal hospital. The trends over time for K. pneumoniae susceptibility to gentamicin were the exception, with both the human and animal hospital showing little change over time. Sensitivity analysis…
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