1799. Impact of real time electronic notifications to pharmacists of rapid diagnostic blood culture results
Session: Poster Abstract Session: Antimicrobial Stewardship: Impact of New Diagnostics
Saturday, October 6, 2018
Room: S Poster Hall
  • Caulder ID Week Poster 9.20.18.jpg (1.1 MB)
  • Background: Rapid diagnostic tests that utilize multiplex PCR technology provide faster time to pathogen identification, but maximizing the impact on outcomes is dependent upon who is available to respond to test results. In June 2017, pharmacists began receiving in-basket notifications of positive results from the institution’s FilmArray BCID assay. The objective of this study was to determine the impact on antibiotic utilization associated with this method of communicating results.

    Methods: This was a retrospective, observational, before-and-after study at an academic medical center with an established stewardship program. Inclusion criteria: Adult patients age ≥18 admitted to an ICU or oncology unit with ≥1 positive blood culture containing a gram-positive organism identified by FilmArray BCID. Patients with polymicrobial infection, concomitant infection caused by a different organism, antibiotics started before admission, or death prior to organism identification were excluded. Data were collected during a 4-month period before (PRE) and a 4-month period after (POST) implementation of in-basket notifications. Stewardship metrics and other outcome measures were compared between the two groups. Pharmacists received no targeted stewardship training on how to respond to results.

    Results: 92 patients met study criteria (49 PRE and 43 POST). Patients were age 62±16, male (55%), and 77 (84%) were located in an ICU. Median Charlson Comorbidity Index was 4 and Pitt Bacteremia Score was 1. 67 patients were considered to have non-contaminant bloodstream infection. Median results for these patients are listed in the table. Patients with contaminants (n=25) had 3.5 and 7 antibiotic free days in the PRE and POST groups, respectively (P = 0.34).

    Conclusion: In-basket notifications did not significantly improve antibiotic utilization or clinical outcomes. Active interventions and antimicrobial stewardship initiatives are needed in combination with rapid diagnostic tests.

    PRE (n=35)

    POST (n=32)


    Time to active therapy (hrs)




    Time to optimal abx (hrs)




    Time to de-escalation (hrs)




    Defined daily doses




    Days of therapy




    In-hospital mortality, n(%)

    9 (26)

    8 (25)


    Length of stay from positive culture (days)




    Liz Caulder, PharmD1, James Beardsley, PharmD2, Elizabeth Palavecino, MD3, Erica Van Dyke, MT(ASCP)4, James Johnson, PharmD2, Christopher Ohl, MD, FIDSA5, Vera Luther, MD5 and John Williamson, PharmD2, (1)Pharmacy, Wake Forest Baptist Medical Center, Winston Salem, NC, (2)Department of Pharmacy, Wake Forest Baptist Health, Winston-Salem, NC, (3)Department of Pathology, Wake Forest Baptist Health, Winston-Salem, NC, (4)Wake Forest Baptist Medical Center, Winston Salem, NC, (5)Department of Internal Medicine, Section on Infectious Diseases, Wake Forest School of Medicine, Winston-Salem, NC


    L. Caulder, None

    J. Beardsley, None

    E. Palavecino, None

    E. Van Dyke, None

    J. Johnson, None

    C. Ohl, None

    V. Luther, None

    J. Williamson, None

    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.