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Pharmacokinetics of florfenicol and its metabolite florfenicol amine in crucian carp (Carassius auratus) at three temperatures after single oral administration.
- Source :
-
Aquaculture . Mar2019, Vol. 503, p446-451. 6p. - Publication Year :
- 2019
-
Abstract
- Abstract The pharmacokinetic profiles of florfenicol (FF) and florfenicol amine (FFA) following a single oral dose of FF at 10 mg·kg−1 body weight were compared in crucian carp reared at three different temperatures of fresh water. The concentrations of FF and FFA were determined simultaneously by high-performance liquid chromatography coupled with fluorescence detection, followed by compartmental analysis using a one-compartment open model. At water temperatures of 10 ± 0.5, 20 ± 0.5, and 25 ± 0.5 °C, the maximum concentration (C max) of FF was 2.435, 2.795, and 3.555 μg·mL−1, respectively, while that of FFA was 0.810, 0.945, and 1.063 μg·mL−1, respectively. The absorption half-life (t 1/2ka) of FF was 0.72, 0.73, and 0.70 h, and the elimination half-life (t 1/2kel) was 22.86 12.29, and 9.56 h, respectively. The volume of distribution per fraction absorbed (V d /F) for FF at water temperatures of 10, 20, and 25 °C was 3.67, 2.99, and 2.29 L·kg−1, respectively. For FFA, the formation half-life (t 1/2kf) was 2.13, 3.47, and 5.11 h, respectively, whereas the t 1/2kel was 27.79, 20.33, and 15.44 h at water temperatures of 10, 20, and 25 °C, respectively. At higher water temperatures, FF was absorbed and eliminated more quickly and was more extensively distributed than at lower water temperatures; in addition, the formation and elimination of FFA were faster at higher water temperatures. From the values of time > minimum inhibitory concentration (T > MIC) calculated in the current study at 10 °C, an oral dose of FF at 10 mg·kg−1 body weight administered at 48-h intervals would be sufficient for the treatment of bacterial infection with an MIC of ≤0.5 μg·mL−1, whereas a 24-h interval would be necessary at 20 and 25 °C to treat bacterial infections with the same MIC. Highlights • The plasma concentrations of florfenicol amine were reported for the first time in crucian carp. • The pharmacokinetic profiles of florfenicol and florfenicol amine in crucian carp were compared at three water temperatures. • The dosing regimens were obtained for florfenicol in crucian carp reared at three different water temperatures. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHARMACOKINETICS
*METABOLITES
*AMINES
*GOLDFISH
*ABSORPTION
Subjects
Details
- Language :
- English
- ISSN :
- 00448486
- Volume :
- 503
- Database :
- Academic Search Index
- Journal :
- Aquaculture
- Publication Type :
- Academic Journal
- Accession number :
- 135053936
- Full Text :
- https://doi.org/10.1016/j.aquaculture.2019.01.037