Efficacy of different dosing schedules of tobramycin for treating a murine Klebsiella pneumoniae bronchopneumonia

Abstract
The efficacy of different dosing schedules of tobramycin for treating a murine Klebsiella bronchopneumonia was compared. Therapeutic efficacy depended upon dosing intervals. In mice treated for four days with a daily dose of 48 mg/kg, dosing intervals of 4 and 8 h allowed cure of 10/10 animals, whereas dosing intervals of 12 and 24h yielded survival rates of only 6/10 (PPin vitro, a post-antibiotic effect of tobramycin against K. pneumoniae was unlikely in vivo since residual concentrations of tobramycin were found in the lung tissue 12 h after dosing, when efficacy starts to decrease. Efficacy also depended to some extent upon the duration of therapy.

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