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Microbial pharmacodynamics of piperacillin in neutropenic mice of systematic infection due toPseudomonas aeruginosa

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Abstract

Mathematical solutions for two possible pharmacodynamic interactions (linear nonsaturable and nonlinear saturable) between antibiotics and microorganisms derived from the incorporation of clinically relevant antibiotic dosage regimens such as single bolus dosing, multiple doses, and constant infusion at steady state have been obtained. It is concluded that the saturable nonlinear interaction model between the tested antibiotic and microorganism appears appropriate. The model and its derived equations are capable of describing in vivobacterial growth of P. aeruginosaafter single bolus dosing and multiple doses of piperacillin as described by a linear one-compartment pharmacokinetic model. The activity of piperacillin against P. aeruginosain the neutropenic mouse systemic infection model can be described by an equation with three dynamic parameters: the bacterial growth rate constant k app ,0.02345min −1, the bacterial killing rate constant k′ kill ,0.02623 min −1, and the Michaelis-Menten type saturation constant Km, 0.05467 μg/ml. The concept and derived equations for the optimal dosing interval and minimum critical concentration are of clinical importance for the proper selection of antibiotic dosage regimens.

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Authors and Affiliations

  1. School of Pharmacy, University of Connecticut, 06268, Storrs, Connecticut

    Jianguo Zhi & Charles H. Nightingale

  2. Pharmacy Research Laboratory, Hartford Hospital, 06115, Hartford, Connecticut

    Jianguo Zhi

  3. Department of Pharmacy, Hartford Hospital, 06115, Hartford, Connecticut

    Charles H. Nightingale

  4. Division Infectious Diseases, Hartford Hospital, 06115, Hartford, Connecticut

    Richard Quintiliani

  5. School of Medicine, University of Connecticut, 06032, Farmington, Connecticut

    Richard Quintiliani

Authors
  1. Jianguo Zhi
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  2. Charles H. Nightingale
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  3. Richard Quintiliani
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Zhi, J., Nightingale, C.H. & Quintiliani, R. Microbial pharmacodynamics of piperacillin in neutropenic mice of systematic infection due toPseudomonas aeruginosa . Journal of Pharmacokinetics and Biopharmaceutics 16, 355–375 (1988). https://doi.org/10.1007/BF01062551

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  • DOI: https://doi.org/10.1007/BF01062551

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