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• W2907121739 endingPage "e0208819" @default.
• W2907121739 startingPage "e0208819" @default.
• W2907121739 abstract "Blood cultures are considered the gold standard to distinguish bacteremia from non-bacteremic systemic inflammation. In current clinical practice, bacteraemia is considered unlikely if blood cultures have been negative for 48-72 hours. Modern BC systems have reduced this time-to-positivity (TTP), questioning whether the time frame of 48-72 hrs is still valid. This study investigates the distribution of TTP, the probability of blood culture positivity after 24 hours, and identifies clinical predictors of prolonged TTP.Adult patients with monomicrobial bacteremia in an academic hospital were included retrospectively over a three-year period. Clinical data were retrieved from the medical records. Predictors of TTP >24 hours were determined by uni- and multivariate analyses. The residual probability of bacteremia was estimated for the scenario of negative BCs at 24 hours after bedside collection.The cohort consisted of 801 patients, accounting for 897 episodes of bacteremia. Mean age was 65 years (IQR 54-73), 534 (59.5%) patients were male. Median TTP was 15.7 (IQR 13.5-19.3) hours. TTP was ≤24 hours in 85.3% of episodes. Antibiotic pre-treatment (adjusted OR 1.77; 95%CI 1.14-2.74, p<0.01) was independently associated with prolonged TTP. The probability of bacteremia, if BC had remained negative for 24 hours, was 1.8% (95% CI 1.46-2.14).With adequate hospital logistics, the probability of positive blood cultures after 24 hours of negative cultures was low. Combined with clinical reassessment, knowledge of this low probability may contribute to prioritization of the differential diagnosis and decisions on antimicrobial therapy. As a potential antibiotic stewardship tool, this strategy warrants further prospective investigation." @default.
• W2907121739 created "2019-01-11" @default.
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• W2907121739 date "2019-01-02" @default.
• W2907121739 modified "2023-10-16" @default.
• W2907121739 title "Time to positivity of blood cultures supports early re-evaluation of empiric broad-spectrum antimicrobial therapy" @default.
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• W2907121739 doi "https://doi.org/10.1371/journal.pone.0208819" @default.
• W2907121739 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6314566" @default.
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