Comparison of the pharmacokinetics of tilmicosin in plasma and lung tissue in healthy chickens and chickens experimentally infected with Mycoplasma gallisepticum.

Journal of Veterinary Pharmacology and Therapeutics
Nan ZhangHuanzhong Ding

Abstract

The objectives of this study were to compare the plasma and lung tissue pharmacokinetics of tilmicosin in healthy and Mycoplasma gallisepticum-infected chickens. Tilmicosin was orally administered at 4, 7.5 and 10 mg/kg body weight (b.w) for the infected and 7.5 mg/kg b.w for the uninfected control group. We found no significant differences in plasma tilmicosin pharmacokinetics between diseased and healthy control chickens. In contrast, the lung tissues in M. gallisepticum-infected chickens displayed a t1/2 (elimination half-life) 1.76 times longer than for healthy chickens. The Cmax (the maximum concentration of drug in samples) of tilmicosin in M. gallisepticum-infected chickens was lower than for controls at 7.5 mg/kg b.w (p < .05), and the AUCinf (the area under the concentration-time curve from time 0 extrapolated to infinity) in infected chickens was higher than for the healthy chickens (p < .05). The mean residence time of tilmicosin in infected chickens was also higher than the healthy chickens. These results indicated that the lungs of healthy chickens had greater absorption of tilmicosin than the infected chickens, and the rate of elimination of tilmicosin from infected lungs was slower.

References

May 17, 2008·Avian Pathology : Journal of the W.V.P.A·B CharlestonL Reeve-Johnson
Feb 18, 2011·Journal of Veterinary Pharmacology and Therapeutics·K R LombardiR P Hunter
Jan 19, 2016·Frontiers in Veterinary Science·KaNa SangZongHui Yuan
Feb 26, 2019·Journal of Veterinary Pharmacology and Therapeutics·Jincheng XiongYinsheng Qiu

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Citations

Dec 4, 2020·Journal of Veterinary Pharmacology and Therapeutics·Nan ZhangHong Yang

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