Depletion of gentamicin and its major components from various tissues of turkeys.
OBJECTIVE
To determine tissue depletion profiles for gentamicin and its 3 major components (C1, C1a, and C2) in turkeys.


METHODS
Twenty 10-week-old male turkeys.


METHODS
birds were maintained as untreated controls. The remaining birds were treated with gentamicin sulfate at a dosage of 2 mg/kg, IM, once daily for 5 days. Treated birds were euthanatized 45, 60, 75, and 90 days (4 birds at each sample time) after the last dose of gentamicin was administered, and samples of muscle, liver, kidney, and skin and fat were collected. Control birds were euthanatized on day 45. Concentrations of the 3 major components of gentamicin were measured by means of reversed-phase high-performance liquid chromatography.


RESULTS
Total gentamicin concentration (ie, sum of the concentrations of the 3 major components) was < 100 microg/kg for all muscle and skin and fat samples by day 45 and all liver samples by day 75. At all sample times, concentration of the gentamicin C1 component was higher than concentrations of the C1a and C2 components in all tissues.


CONCLUSIONS
Results suggest that tissue depletion profiles of the 3 major components of gentamicin differ from each other. Withdrawal time, therefore, may depend on the ratio of the components in the pharmaceutical preparation used.
Vetgenerics Research G. Ziv Ltd, PO Box 2473, Rehovot, 76124 Israel.
Motti
M
Shem-Tov
Nagy
N
Gabor
Miklós
M
Suth
Peter
P
Kormoczy
D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D000900:Anti-Bacterial Agents / Q000493:pharmacokinetics; D005839:Gentamicins / Q000493:pharmacokinetics*; D007668:Kidney / Q000378:metabolism*; D007700:Kinetics; D008099:Liver / Q000378:metabolism*; D008297:Male; D008657:Metabolic Clearance Rate; D018482:Muscle, Skeletal / Q000378:metabolism*; D012867:Skin / Q000378:metabolism; D014018:Tissue Distribution; D014422:Turkeys
D000900:Anti-Bacterial Agents; D005839:Gentamicins