Abstract
In llama crias (tekes), Escherichia coli and Staphylococcus aureus are major pathogens, and marbofloxacin could be a suitable choice. The objectives of this study were (a) to evaluate the serum pharmacokinetics of marbofloxacin (5 mg/kg) after intravenous administration in tekes and simulate a multidose regimen; (b) to emulate pharmacokinetic profiles after single dose and steady-state conditions by Monte Carlo simulation (c) to determine the MIC of regional strains of Escherichia coli and Staphylococcus aureus; (d) to perform a PK/PD analysis by Monte Carlo simulation. Pharmacokinetics of marbofloxacin was evaluated in six animals at 3, 10, 24, 50, and 80 days after birth. Marbofloxacin were determined by HPLC. A steady-state multi-dose simulation was carried out, and concentration-time profiles were generated by Monte Carlo simulation. MIC of marbofloxacin against regional E. coli and S. aureus strains were also determined. Finally, a PK/PD analysis was conducted by Monte Carlo simulation. After pharmacokinetic analysis, clearance showed a trend to increase (0.14 and 0.18 L kg-1 hr-1 ), and AUC (36.74 and 15.21 μg hr-1 ml-1 ) and Vss (3.06 and 3.37 L/kg) trended to decrease at 3 and 80 days-old, respectively, showing accumu...Continue Reading
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