2435. Clinical outcomes with ceftolozane-tazobactam in patients with multi drug resistant (MDR) Pseudomonas aeruginosa bloodstream infections: a multi-center study
Session: Poster Abstract Session: Treatment of AMR Infections
Saturday, October 6, 2018
Room: S Poster Hall
Posters
  • TOLTAZ bsi pseudo for ID week 2018.pdf (847.6 kB)
  • Background:

    Ceftolozane-tazobactam (TOL-TAZ) is a novel cephalosporin combination that is beneficial for the treatment of multidrug resistant (MDR) Pseudomonas infections. However, little data is available on the utility of TOL-TAZ for patients with bloodstream infections (BSIs) caused by this organism.

    Methods:

    A retrospective, multicenter chart review was conducted at 11 hospitals to evaluate the utility of TOL-TAZ for MDR Pseudomonas BSIs from June 2016 to February 2018. Patients were included if they were over 18 years old with positive blood cultures for Pseudomonas aeruginosa and received TOL-TAZ for at least 24 hours. Patients were evaluated for in-hospital and 30-day mortality, as well as microbiologic and clinical cure.

    Results:

    Characteristic

    Results (N=25)

    Male gender, n (%)

    15 (60)

    Age, median (range)

    60 (52-66)

    Charlson comorbidity index, median (IQR)

    5 (4-7)

    APACHE II score, median (IQR)

    19 (16.25-25.5)

    ICU, n (%)

    15 (60)

    Organ transplant, n (%)

    8 (32)

    Concomitant antibiotics used, n (%)

    Aminoglycoside, n/N (%)

    Fluoroquinolone, n/N (%)

    Polymyxin, n/N (%)

    Beta-lactam, n/N (%)

    14 (56)

    8/14 (57)

    5/14 (35)

    2/14 (14)

    1/14 (7)

    Duration of TOL-TAZ, days (median, IQR)

    13 (8-14)

    Susceptibility to TOL-TAZ, n/N tested (%)

    19/20 (95)

    High dose (3g every 8 hrs), n (%)

    6 (24)

    Renal dose adjustment, n (%)

    8 (32)

    Adverse events, n (%)

    1 (4)

    Primary infection

    30 day mortality, n/N (%)

    In-hospital mortality, n/N (%)

    Microbiologic success, n/N (%)

    Clinical Success, n/N (%)

    Primary bacteremia

    Pneumonia

    UTI

    Intra-abdominal

    1/7 (14.3)

    5/8 (62.5)

    1/6 (16.7)

    0/4 (0)

    0/7 (0)

    5/8 (62.5)

    1/6 (16.7)

    0/4 (0)

    7/7 (100)

    3/8 (37.5)

    6/6 (100)

    4/4 (100)

    6/7 (85.7)

    3/8 (37.5)

    6/6 (100)

    4/4 (100)

    30 day mortality, n (%)

    7 (28)

    In hospital mortality, n (%)

    6 (24)

    Microbiologic cure, n (%)

    20 (80)

    Clinical success, n (%)

    19 (76)

    Conclusion:

    In this multi-center evaluation of 25 patients from 11 health centers, mortality was seen at 30 days and at the end of stay in 28% and 24% of patients, respectively. Clinical and microbiologic success occurred in over 70% of patients. One patient developed C. difficile infection. The 7 patients with primary bacteremia had microbiologic success and survived their hospital stay. Two of 3 patients with pneumonia who survived received high dose TOL-TAZ. TOL-TAZ is an option for patients with MDR Pseudomonas bloodstream infections.

    Madeline King, PharmD, Philadelphia College of Pharmacy, University of the Sciences, Philadelphia, PA, Abdulrahman Elabor, MD, Infectious Diseases, Temple University Hospital, Philadelphia, PA, Esther Molnar, MD, Infectious Disease, Temple University Hospital, Philadelphia, PA, Jason Gallagher, PharmD, FCCP, FIDSA, BCPS, Temple University School of Pharmacy, Philadelphia, PA and TOL-TAZ for Resistant Pseudomonas Study Group

    Disclosures:

    M. King, None

    A. Elabor, None

    E. Molnar, None

    J. Gallagher, Achaogen: Consultant , Consulting fee . Merck: Consultant , Grant Investigator and Speaker's Bureau , Consulting fee and Research grant . Allergan: Consultant and Speaker's Bureau , Consulting fee . Astellas: Consultant and Speaker's Bureau , Consulting fee . Cempra: Consultant , Consulting fee . Cidara: Consultant , Consulting fee . CutisPharma: Consultant , Consulting fee . Paratek: Consultant , Consulting fee . Shionogi: Consultant , Consulting fee . Tetraphase: Consultant , Consulting fee . Theravance: Consultant , Consulting fee . The Medicines Company: Consultant , Consulting fee . Melinta: Speaker's Bureau , Consulting fee .

    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.