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Meropenem dosing requirements against Enterobacteriaceae in critically ill patients: influence of renal function, geographical area and presence of extended-spectrum β-lactamases

  • A. Isla
  • A. Canut
  • J. Arribas
  • E. Asín-Prieto
  • A. Rodríguez-GascónEmail author
Original Article

Abstract

The aim of this study was the evaluation of the influence of the susceptibility patterns of Escherichia coli and Klebsiella pneumoniae isolates, specifically the presence of extended-spectrum β-lactamases and the geographical area (Europe and USA), on the meropenem dosing requirements in critically ill patients with different degrees of renal function by estimation of the probability of pharmacokinetic/pharmacodynamic (PK/PD) target attainment. Additionally, estimation of the PK/PD breakpoints according to the European Committee on Antimicrobial Susceptibility Testing (EUCAST) approach was also an objective. Six dosing regimens were evaluated: 0.5 g, 1 g and 2 g every 8 h given as 0.5-h or 3-h infusions. Pharmacokinetic data were obtained from the literature, and susceptibility data to meropenem for E. coli and K. pneumoniae were collected from the Tigecycline Evaluation and Surveillance Trial (T.E.S.T.) surveillance study. For the same dose level, the 3-h infusion provided a probability of target attainment (PTA) ≥90 % for minimum inhibitory concentration (MIC) values up to two-fold dilution higher than those obtained with the 0.5-h infusion. For E. coli, the cumulative fraction of response (CFR) was 100 % in most cases, and neither the dose nor the infusion length nor the geographical area significantly affected the probability to reach the target. With regards to K. pneumoniae, the CFR increased when increasing the dose and decreasing the creatinine clearance (CLCR). The CFR for Spanish and USA strains was higher than that calculated for European strains. Meropenem PK/PD breakpoints are dependent on the dose, infusion length and CLCR, ranging from 2 to 32 mg/L. Based on our results, meropenem administered as a extended infusion is the best option to treat infections due to E. coli and K. pneumoniae.

Keywords

Minimum Inhibitory Concentration Meropenem Susceptibility Pattern Virtual Patient EUCAST 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was supported by the Department of Education, Universities and Research (IT341-10), Basque Government, Spain. We thank the University of the Basque Country UPV/EHU for the grant awarded to E. Asín-Prieto.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • A. Isla
    • 1
    • 2
  • A. Canut
    • 3
    • 4
  • J. Arribas
    • 5
  • E. Asín-Prieto
    • 1
    • 2
  • A. Rodríguez-Gascón
    • 1
    • 2
    Email author
  1. 1.Pharmacokinetics, Nanotechnology and Gene Therapy Group (PharmaNanoGene), Faculty of PharmacyUniversity of the Basque Country UPV/EHUVitoria-GasteizSpain
  2. 2.Centro de Investigación Lascaray IkerguneaUniversity of the Basque Country UPV/EHUVitoria-GasteizSpain
  3. 3.Microbiology Service, Hospital Universitario de Álava (HUA)Servicio Vasco de Salud OsakidetzaVitoria-GasteizSpain
  4. 4.Instituto de Investigación Sanitaria de Álava (BIOARABA)Servicio Vasco de Salud OsakidetzaVitoria-GasteizSpain
  5. 5.Microbiology ServiceHospital Clínico UniversitarioZaragozaSpain

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