1064. Antimicrobial Stewardship Program at a Large Academic Medical Center, Impact Over 12 Years

Abstract

BackgroundThe University of Minnesota Medical Center (UMMC) is a tertiary care facility, which has had a comprehensive antimicrobial stewardship program (ASP) for 12 years.MethodsThe antimicrobial stewardship team is comprised of a full-time PharmD and ID staff physicians. Recommendations are placed in the electronic medical record as a progress note. Verbal recommendations may also be made.ResultsThere was a downward trend in Hospital-acquired (HA) C. difficile diarrhea from 2007 to 2014 from 1.2 to 0.5/1000 patient-days (pt day). Rates appear stable from 2014 to 2019 with adjustment for change to NHSN lab-based CDI surveillance (Figure 1). From 2009 to 2019 a decrease was seen in VRE hospital-acquired infections (HAI) from 0.53 to 0.21/1,000 patient-days and in MRSA HAIs from 0.2 to 0.14/1,000 patient-days. Newly acquired ESBL HAIs have remained relatively stable from 2009 to 2019 at 0.09 to 0.05/1,000 patient-days. CRE HAIs are low but stable rates at 0.02/1,000 patient-days (Figure 2). We track antimicrobial utilization for internal and national reporting (starting in July 2017). A SAAR for all Antibacterial agents (ICUs, wards, and oncology units) of 1.33 in 2018. Our top four agents average DOT; piperacillin/tazobactam (66.81), cefepime (34.40), oral levofloxacin (23.56) and intravenous meropenem (21.49). We demonstrate lower average DOT for our restricted antimicrobials (206.21) as compared with our nonrestricted antimicrobials (236.74) (Figure 3). Cost savings continued from year to year. After adjusting for inflation annually, our expected costs ($84.08) compared with actual costs ($40.12 ytd 2019), demonstrates effective cost management of antimicrobial agents. (Figure 4)ConclusionWe observed a decrease in HAIs VRE and C. difficile infections after 3 years of operation, and MRSA after 5 years. This downward trend has continued. ESBL HAIs remain relatively stable and CRE are stable at low rates but remain emerging HAIs of concern. We are now focusing efforts on limiting unneeded fluoroquinolone and carbapenem use. We continue to analyze our SAAR data and internal DOT data to identify areas of opportunity to improve antimicrobial use. The ASP outcomes have continued to cost justify ongoing efforts. The effects of the program and the Infection Prevention Department appear to be synergistic. Disclosures All authors: No reported disclosures.