Abstract

The purpose of this study was to evaluate the pharmacokinetics of cefquinome (CFQ) following single intravenous (IV) or intramuscular (IM) injections of 2mg/kg body weight in red-eared slider turtles. Plasma concentrations of CFQ were determined by high-performance liquid chromatography and analyzed using noncompartmental methods. The pharmacokinetic parameters following IV injection were as follows: elimination half-life (t1/2λz ) 21.73±4.95hr, volume of distribution at steady-state (Vdss ) 0.37±0.11L/kg, area under the plasma concentration-time curve (AUC0-∞ ) 163±32μghr-1 ml-1 , and total body clearance (ClT ) 12.66±2.51 mlhr-1 kg-1 . The pharmacokinetic parameters after IM injection were as follows: peak plasma concentration (Cmax ) 3.94±0.84μg/ml, time to peak concentration (Tmax ) 3hr, t1/2λz 26.90±4.33hr, and AUC0-∞ 145±48μghr-1 ml-1 . The bioavailability after IM injection was 88%. Data suggest that CFQ has a favorable pharmacokinetic profile with a long half-life and a high bioavailability in red-eared slider turtles. Further studies are needed to establish a multiple dosage regimen and evaluate clinical efficacy.

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