1238. A National Comparison of Antibiograms Between Veterans Affairs Long-Term Care Facilities and Affiliated Hospitals
Session: Poster Abstract Session: Healthcare Epidemiology: Non-acute Care Settings
Friday, October 5, 2018
Room: S Poster Hall
  • Poster_IDWEEK 2018 CLC-VAMC antibiogram comparisons_FINAL.pdf (4.0 MB)
  • Background: Long-term care facilities (LTCFs) face several barriers to creating antibiograms. Here, we evaluate if LTCFs can use antibiograms from affiliated hospitals as their own antibiogram.

    Methods: Facility-specific antibiograms were created for all Veterans Affairs (VA) LTCFs and VA Medical Centers (VAMCs) for 2017. LTCFs and affiliated VAMCs were paired and classified as being on the same campus or geographically distinct campuses based on self-report. For each pair, Escherichia coli susceptibility rates (%S) to cefazolin, ceftriaxone, cefepime, ciprofloxacin, nitrofurantoin, sulfamethoxazole/trimethoprim, ampicillin/sulbactam, piperacillin/tazobactam, and imipenem were compared. As guidelines discourage empiric use of antibiotics if susceptibility rates are <80%, we assessed clinical discordance between each LTCF and affiliated VAMC antibiogram at a threshold of 80% susceptible. The proportions of concordant susceptibilities between LTCFs and VAMCs on the same campus versus geographically distinct campuses were compared using Chi-square tests.

    Results: A total of 119 LTCFs and their affiliated VAMCs were included in this analysis, with 70.6% (n=84) of facilities located on the same campus and 29.4% (n=35) on geographically distinct campuses. The table below shows the overall clinical concordance (agreement) of LTCFs with their affiliated VAMC in regards to E. coli %S to the compared antibiotics. No significant differences were found when comparing LTCFs on the same campus versus geographically distinct campuses.

    Agreement Rates between LTCFs and Affiliated VAMCs















    Conclusion: Antibiograms between LTCFs and affiliated VAMCs had a high concordance, except for sulfamethoxazole/trimethoprim, cefazolin and ceftriaxone in regards to susceptibility rates of E. coli. Facilities on the same campus were found to have similar concordance rates to geographically distinct facilities. Future studies are needed to investigate how the various approaches to creating LTCF-specific antibiograms are associated with clinical outcomes.

    Maria-Stephanie Tolg, PharmD1,2, Aisling Caffrey, PhD, MS1,2, Haley Appaneal, PharmD1,3, Robin Jump, MD, PhD4,5, Vrishali Lopes, MS1, David Dosa, MD, MPH1,3 and Kerry LaPlante, Pharm.D., FCCP, FIDSA1,2,6, (1)Center of Innovation in Long-Term Support Services, Providence Veterans Affairs Medical Center, Providence, RI, (2)College of Pharmacy, University of Rhode Island, Kingston, RI, (3)Warren Alpert Medical School of Brown University, Providence, RI, (4)Geriatric Research Education and Clinical Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, (5)Department of Medicine and Department of Population & Quantitative Health Sciences, Cleveland, OH, (6)Division of Infectious Diseases, Warren Alpert Medical School of Brown University, Providence, RI


    M. S. Tolg, Veterans Affairs: Investigator , Research grant .

    A. Caffrey, Veterans Affairs: Investigator , Research grant .

    H. Appaneal, Veterans Affairs: Grant Investigator , Research grant .

    R. Jump, Veterans Affairs: Investigator , Research grant .

    V. Lopes, Veterans Affairs: Investigator , Research grant .

    D. Dosa, Veterans Affairs: Grant Investigator , Research grant .

    K. LaPlante, Veterans Affairs: Investigator , Research grant .

    Findings in the abstracts are embargoed until 12:01 a.m. PDT, Wednesday Oct. 3rd with the exception of research findings presented at the IDWeek press conferences.