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Differential time to positivity is not predictive for central line-related Staphylococcus aureus bloodstream infection in routine clinical care.
- Source :
-
The Journal of infection [J Infect] 2014 Jan; Vol. 68 (1), pp. 58-61. Date of Electronic Publication: 2013 Aug 15. - Publication Year :
- 2014
-
Abstract
- Objectives: Many physicians rely on differential time to positivity (DTP) when diagnosing catheter-related bloodstream infection (CRBSI). We evaluated whether DTP from routine blood cultures can predict catheter-related Staphylococcus aureus bloodstream infection.<br />Methods and Patients: From 2006 to 2011 adult patients with monomicrobial S. aureus bloodstream infection and matched pairs of central and peripheral blood cultures were prospectively followed. CRBSI was defined by the absence of other infective foci and recovery of S. aureus from the catheter tip or catheter exit-site, or local signs of infection at the catheter exit site. A DTP of more than two hours (cut-off) was used to define test positivity.<br />Results: CRBSI was present in 30 (34%, prevalence) of 87 patients. In 24 (28%) patients a DTP of more than two hours was measured: eleven patients had CRBSI, ten deep-seated infections, and in three patients an infective focus was not identified. DTP showed a positive predictive value of 0.46 [95% confidence interval (CI) 0.28 to 0.65], and a negative predictive value of 0.70 [95% CI 0.58 to 0.80].<br />Conclusion: The low test performance suggests that DTP is not useful in diagnosing CRBSI in routinely obtained blood cultures. Therefore, physicians should not solely rely on DTP and rather promote catheter removal and culture.<br /> (Copyright © 2013 The British Infection Association. Published by Elsevier Ltd. All rights reserved.)
- Subjects :
- Adult
Bacteremia microbiology
Catheter-Related Infections microbiology
Cohort Studies
Humans
Prospective Studies
ROC Curve
Staphylococcal Infections microbiology
Staphylococcus aureus growth & development
Time Factors
Bacteremia diagnosis
Catheter-Related Infections diagnosis
Central Venous Catheters adverse effects
Staphylococcal Infections diagnosis
Staphylococcus aureus isolation & purification
Subjects
Details
- Language :
- English
- ISSN :
- 1532-2742
- Volume :
- 68
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- The Journal of infection
- Publication Type :
- Academic Journal
- Accession number :
- 23954613
- Full Text :
- https://doi.org/10.1016/j.jinf.2013.08.006