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Comparative pharmacokinetics of florfenicol in healthy and Pasteurella multocida ‐infected Gaoyou ducks
Author(s) -
Lan Weixuan,
Xiao Xia,
Jiang Yongjia,
Jiang Lijie,
Zhao Xu,
Yu Zhaoyang,
Zhu Biwen,
Li Congcong,
Bian Lin,
Wang Zhiqiang
Publication year - 2019
Publication title -
journal of veterinary pharmacology and therapeutics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.527
H-Index - 60
eISSN - 1365-2885
pISSN - 0140-7783
DOI - 10.1111/jvp.12761
Subject(s) - pasteurella multocida , fowl cholera , florfenicol , pharmacokinetics , lung , pasteurella , veterinary medicine , medicine , biology , zoology , microbiology and biotechnology , antibiotics , pharmacology , bacteria , genetics
Pasteurella multocida is the causative agent of fowl cholera, and florfenicol ( FF ) has potent antibacterial activity against P. multocida and is widely used in the poultry industry. In this study, we established a P. multocida infection model in ducks and studied the pharmacokinetics of FF in serum and lung tissues after oral administration of 30 mg/kg bodyweight. The maximum concentrations reached ( C max) were lower in infected ducks (13.88 ± 2.70 μg/ml) vs. healthy control animals (17.86 ± 1.57 μg/ml). In contrast, the mean residence time (MRT: 2.35 ± 0.13 vs. 2.27 ± 0.18 hr) and elimination half‐life ( T ½β : 1.63 ± 0.08 vs. 1.57 ± 0.12 hr) were similar for healthy and diseased animals, respectively. As a result, the area under the concentration curve for 0–12 hr (AUC 0–12 hr ) for FF in healthy ducks was significantly greater than that in infected ducks (49.47 ± 5.31 vs. 34.52 ± 8.29 μg hr/ml). The pharmacokinetic differences of FF in lung tissues between the two groups correlated with the serum pharmacokinetic differences. The C max and AUC 0–12 hr values of lung tissue in healthy ducks were higher than those in diseased ducks. The concentration of FF in lung tissues was approximately 1.2‐fold higher than that in serum both in infected and healthy ducks indicating that FF is effective in treating respiratory tract infections in ducks.