In vitro antibacterial activity of danofloxacin against Escherichia coli isolated from pigeons and its pharmacokinetic in pigeons

Ming-Hui Duan; Ze-En Li; Yan-Ni Zhang; Yang-Guang Jin; Yue Liu; Xing-Ping Li; Fan Yang

Poultry Science (Oct 2024)

In vitro antibacterial activity of danofloxacin against Escherichia coli isolated from pigeons and its pharmacokinetic in pigeons

Ming-Hui Duan,
Ze-En Li,
Yan-Ni Zhang,
Yang-Guang Jin,
Yue Liu,
Xing-Ping Li,
Fan Yang

Affiliations

Ming-Hui Duan: Laboratory of Veterinary Drug Development and Evaluation, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China
Ze-En Li: Laboratory of Veterinary Drug Development and Evaluation, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China
Yan-Ni Zhang: Laboratory of Veterinary Drug Development and Evaluation, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China
Yang-Guang Jin: Laboratory of Veterinary Drug Development and Evaluation, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China
Yue Liu: Laboratory of Veterinary Drug Development and Evaluation, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China
Xing-Ping Li: Laboratory of Veterinary Drug Development and Evaluation, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China
Fan Yang: Corresponding author:; Laboratory of Veterinary Drug Development and Evaluation, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China

Journal volume & issue: Vol. 103, no. 10
p. 104168

Abstract

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ABSTRACT: This experiment aimed to investigate the in vitro antimicrobial activity of danofloxacin against Escherichia coli (E. coli) isolated from pigeons, as well as the pharmacokinetics of danofloxacin in pigeons following oral (PO), intramuscular (IM), and intravenous (IV) administration. The minimum inhibitory concentration (MIC) of danofloxacin was first determined for 38 clinical E. coli strains using the micro broth dilution method. Subsequently, 30 healthy pigeons were weighed and randomly divided into 3 groups: IM, IV, and PO, with 10 pigeons in each group. Danofloxacin was given at 5 mg/kg body weight (BW) through 3 different routes. Blood was collected, and plasma was separated at various time points from 0 to 48 h. Plasma samples were analyzed for danofloxacin concentrations using a validated HPLC method. Pharmacokinetic analysis was performed using Phoenix software and a noncompartmental analytical (NCA) method. The results indicated that danofloxacin had a strong antibacterial effect on E. coli, with a MIC50 of 0.5 μg/mL. The noncompartmental analysis showed that after PO and IM administration at 5 mg/kg in pigeons, peak plasma concentrations (Cmax) of 0.61 and 1.62 μg/mL were reached at 4.5 and 0.53 h, respectively. The oral and intramuscular bioavailability (F) were 68.08% ± 24.82% and 87.82% ± 25.36%, respectively. Following IV administration, danofloxacin was widely distributed in pigeons, with volume of distribution (VZ) and volume of distribution at steady state (VSS) values of 6.11 ± 2.01 and 4.65 ± 1.62 L/kg, respectively, and was eliminated slowly, with an elimination half-life (t1/2λz) of 6.41 ± 2.15 h. Based on the calculated ratio values of AUC/MIC, the current IV, IM, and PO doses of 5 mg/kg of danofloxacin would be expected to effectively treat pigeons infected with E. coli strains with MIC values equal to or less than 0.5 μg/mL.

Published in Poultry Science

ISSN: 0032-5791 (Print); 1525-3171 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Agriculture: Animal culture
Website: https://www.journals.elsevier.com/poultry-science

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