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Wu X, Lin Z, Toney E, Clapham MO, Wetzlich SE, Davis JL, Chen Q, Tell LA. Pharmacokinetics, tissue residue depletion, and withdrawal interval estimations of florfenicol in goats following repeated subcutaneous administrations. Food Chem Toxicol 2023; 181:114098. [PMID: 37838212 DOI: 10.1016/j.fct.2023.114098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/05/2023] [Accepted: 10/10/2023] [Indexed: 10/16/2023]
Abstract
Florfenicol is a broad-spectrum antibiotic commonly used in the U.S. to treat respiratory and enteric infections in goats in an extra-label manner, which requires scientifically based withdrawal intervals (WDIs) for edible tissues. This study aimed to determine the depletion profiles for florfenicol and florfenicol amine in plasma and tissues samples and to estimate WDIs for goats following subcutaneous injection of 40 mg/kg florfenicol, twice, 96 h apart. The samples were collected up to 50 days after the second dose. Pharmacokinetic parameters were calculated using non-compartmental analysis. Three different pharmacostatistical methods with different operational tolerances were used to calculate WDIs. The plasma half-life was 101.80 h for florfenicol and 207.69 h for florfenicol amine after the second dose. Using the FDA tolerance limit method, WDIs were 202 and 101 days, while the EMA maximum residue limit method estimated 179 and 96 days for the respective tissue concentrations to fall below limits of detection (0.12 μg/g for liver and 0.05 μg/g for kidney). This study characterizes plasma pharmacokinetics and tissue depletion profiles of florfenicol and florfenicol amine in goats following subcutaneous injections and reports estimated WDIs for food safety assessment of florfenicol in goats.
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Affiliation(s)
- Xue Wu
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, United States.
| | - Zhoumeng Lin
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, United States.
| | - Emily Toney
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA, United States.
| | - Maaike O Clapham
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA, United States.
| | - Scott E Wetzlich
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA, United States.
| | - Jennifer L Davis
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States.
| | - Qiran Chen
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, United States.
| | - Lisa A Tell
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA, United States.
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Shao HT, Gao L, Li HT, Zhang M, Chen JC, Duan MH, Li ZE, Dai Y, Li XP, Yang F. Egg residue and depletion of meloxicam in Jing Hong laying hens following multiple oral doses. Poult Sci 2023; 102:102761. [PMID: 37270891 PMCID: PMC10258491 DOI: 10.1016/j.psj.2023.102761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 06/06/2023] Open
Abstract
Meloxicam is a nonsteroidal anti-inflammatory drug (NSAID) commonly used in an extra-label manner in commercial laying hens for the treatment of foot lesions, which are a common issue in this species. The present study aimed to determine the depletion profiles of meloxicam in eggs with multiple oral administration under 2 different dosing regimens and to further recommend reasonable withdrawal intervals (WDIs). Meloxicam (1 mg/kg) was administered orally to laying hens under 2 dosing schedules: 10 doses at 24-h intervals and 15 doses at 12-h intervals. Eggs were collected daily after the first dosing, and meloxicam concentrations in both yolk and white were determined by a high-performance liquid chromatography (HPLC) method. The weight ratio of white to yolk in the whole egg was 1.54 (the mean of 20 eggs with repeated tests), and this value combined with the meloxicam concentrations in white and yolk were used to calculate the drug concentrations in whole eggs. Meloxicam was quickly eliminated from egg white, and its concentrations could only be quantified at 2 time points during the elimination phase. The elimination half-lives in yolk and whole egg were 3.07 ± 1.00 and 2.98 ± 0.88 d, respectively, after 10 repeated doses. And the corresponding elimination half-lives were 2.30 ± 0.83 and 2.18 ± 0.67 d, respectively, after repeated 15 doses. Considering the time when meloxicam was not detectable in eggs with the time of ovum development and maturation, a withdrawal interval (WDI) was suggested as 17 d for both dosing schedules. The current results enriched the study on the residue of meloxicam in domestic Jing Hong laying hens and provided WDIs to help ensure animal-derived food safety.
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Affiliation(s)
- Hao-Tian Shao
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Liang Gao
- College of Animal Science, Yili Vocational and Technical College, Yili 835000, Xinjiang, China
| | - Hao-Tian Li
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Mei Zhang
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Jun-Cheng Chen
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Ming-Hui Duan
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Ze-En Li
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Yan Dai
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Xing-Ping Li
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Fan Yang
- Department of Basic Veterinary Science, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China.
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A web-based interactive physiologically based pharmacokinetic (iPBPK) model for meloxicam in broiler chickens and laying hens. Food Chem Toxicol 2022; 168:113332. [DOI: 10.1016/j.fct.2022.113332] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/16/2022] [Accepted: 07/25/2022] [Indexed: 02/06/2023]
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