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.  Clostridium difficile -associated disease (CDAD) is treated using antibiotics, which often leads to the emergence of antibiotic-resistant bacteria such as vancomycin-resistant enterococci (VRE). This study estimated the impact of a non antibiotic treatment for CDAD on VRE prevalence.  Methods . A previously published model describing the impact of in-hospital antibiotic use on VRE prevalence was adapted to include CDAD treatment. Simulations compared the prevalence of VRE when nonantibiotic versus antibiotic therapy was used.  Results . Nonantibiotic treatment in 50% of CDAD patients resulted in an 18% relative reduction in the prevalence of VRE colonization compared with antibiotic use only. Sensitivity analysis found the model to be most sensitive to rates of antibiotic initiation and discontinuation, prevalence of VRE in admitted patients, length of stay of colonized patients, probability of CDAD acquisition, and hand-washing compliance.  Conclusion . Nonantibiotic treatment of patients hospitalized with CDAD may significantly reduce the incidence of VRE colonization.

computational and mathematical methods in medicine

Mathematical Model of the Impact of a Nonantibiotic Treatment for<i>Clostridium difficile</i>on the Endemic Prevalence of Vancomycin-Resistant Enterococci in a Hospital Setting

Mathematical Model of the Impact of a Nonantibiotic Treatment forClostridium difficileon the Endemic Prevalence of Vancomycin-Resistant Enterococci in a Hospital Setting