The impact of a rapid molecular identification test on positive blood cultures from critically ill with bacteremia: A pre-post intervention study
Autoři:
Alexia Verroken aff001; Noémie Despas aff001; Hector Rodriguez-Villalobos aff001; Pierre-François Laterre aff002
Působiště autorů:
Department of Microbiology, Cliniques Universitaires Saint-Luc – Université Catholique de Louvain, Brussels, Belgium
aff001; Intensive Care Department, Cliniques Universitaires Saint-Luc – Université Catholique de Louvain, Brussels, Belgium
aff002
Vyšlo v časopise:
PLoS ONE 14(9)
Kategorie:
Research Article
doi:
https://doi.org/10.1371/journal.pone.0223122
Souhrn
Objectives
Bloodstream infections in critically ill require a speeded-up microbiological diagnosis to improve clinical outcomes. In this pre-post intervention study, we evaluated how a molecular identification test directly performed on positive blood cultures of critically ill improves patient’s therapeutic management.
Methods
All adult patients staying at the intensive care unit (ICU) at the time of positive blood culture detection were study-eligible. In the 8-month pre-intervention period (P0), standard positive blood culture management was performed. In the 10-month intervention period (P1), a BioFire® FilmArray® blood culture identification (FA-BCID) test (bioMérieux) was additionally performed 24/7 at detection. The evaluated clinical outcome was time to optimal antimicrobial treatment of the bloodstream infection. FA-BCID microbiological test performances were also analysed.
Results
163 positive blood culture episodes were allocated to P0 and 166 to P1. After the withdrawal of episodes in accordance with defined exclusion criteria, outcome analysis was performed on 110 bloodstream infections both in P0 and P1. Time to optimal antimicrobial treatment in P0 was 14h41 compared to 4h39 in P1. FA-BCID test results led to a treatment adjustment in 35/110 (31.8%) P1 episodes including 26 where the adjustment was the optimal antimicrobial treatment. FA-BCID testing identified 96.2% of the on-panel microorganisms thereby covering 85.2% of our ICU-strain epidemiology. Time to identification with FA-BCID testing was calculated at 1h35. Resistance detection was in complete concordance with routine results. Considering 150 FA-BCID tests were initially performed in P1, 4,3 tests were required to have 1 test leading to an improved therapeutic outcome.
Conclusions
FA-BCID testing drastically reduced time to optimal antimicrobial treatment in critically ill with bloodstream infections.
Klíčová slova:
Antibiotics – Antimicrobials – Blood – Enterococcus faecalis – Intensive care units – Matrix-assisted laser desorption ionization time-of-flight mass spectrometry – Staphylococcus aureus – Bloodstream infections
Zdroje
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