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Stastny K, Hodkovicova N, Jerabek M, Petren M, Viskova M, Papouskova A, Bartejsova I, Putecova-Tosnerova K, Charvatova M, Zouharova M, Matiaskova K, Nedbalcova K. Dosage Optimisation of Trimethoprim and Sulfamethoxazole for the Treatment of an Avian Pathogenic Strain of Escherichia coli in Broiler Chickens. Antibiotics (Basel) 2023; 13:11. [PMID: 38275321 PMCID: PMC10812532 DOI: 10.3390/antibiotics13010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/08/2023] [Accepted: 12/19/2023] [Indexed: 01/27/2024] Open
Abstract
Based on pharmacokinetic studies carried out according to the methodologies defined by the European Medicines Agency (EMA) using mass spectrometry analysis, a new formulation of a veterinary drug for the treatment of broiler chickens is proposed. Currently, the traditional trimethoprim-sulfamethoxazole drug used for broilers is applied in a 1:5 ratio, and the recommended dose is 45 mg kg-1 of live weight administered at 24 h intervals for 3 to 5 days. In this study, we propose a novel combination containing similar active substances in a newly established ratio of 1:4, with a recommended dosage of 20 mg kg-1 of live weight administered at 24 h intervals for 3 to 5 days. With this method, the currently recommended dose of the traditional trimethoprim-sulfamethoxazole drug used for broilers can be reduced by more than half. The efficacy of the newly designed formulation and dosage of the drug was verified in a bioassay for the treatment of broilers experimentally infected with an avian pathogenic strain of Escherichia coli. In the experiment, we compared the newly designed dosage with the traditional dosage in terms of efficacy and dosage. There were no statistically significant differences between the two drugs in efficacy regarding the survival of chickens after experimental infection or changes in their health status. The experimental results suggest that a significant reduction in the recommended daily dose of drugs containing trimethoprim and sulfamethoxazole for the treatment of bacterial infections in broilers is possible and can support the prudent use of antimicrobials, including the limitation of their overuse.
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Affiliation(s)
- Kamil Stastny
- Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (K.S.); (N.H.); (I.B.); (K.P.-T.); (M.C.); (M.Z.); (K.M.)
| | - Nikola Hodkovicova
- Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (K.S.); (N.H.); (I.B.); (K.P.-T.); (M.C.); (M.Z.); (K.M.)
| | - Martin Jerabek
- Tekro, Ltd., Visnova 484/2, 140 00 Prague, Czech Republic; (M.J.); (M.P.); (M.V.)
| | - Michal Petren
- Tekro, Ltd., Visnova 484/2, 140 00 Prague, Czech Republic; (M.J.); (M.P.); (M.V.)
| | - Michaela Viskova
- Tekro, Ltd., Visnova 484/2, 140 00 Prague, Czech Republic; (M.J.); (M.P.); (M.V.)
| | - Aneta Papouskova
- Institute of Infection Diseases and Microbiology, Faculty of Veterinary Medicine, University of Veterinary Sciences, Palackeho 1-3, 612 42 Brno, Czech Republic;
| | - Iva Bartejsova
- Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (K.S.); (N.H.); (I.B.); (K.P.-T.); (M.C.); (M.Z.); (K.M.)
| | - Kristina Putecova-Tosnerova
- Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (K.S.); (N.H.); (I.B.); (K.P.-T.); (M.C.); (M.Z.); (K.M.)
| | - Michaela Charvatova
- Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (K.S.); (N.H.); (I.B.); (K.P.-T.); (M.C.); (M.Z.); (K.M.)
| | - Monika Zouharova
- Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (K.S.); (N.H.); (I.B.); (K.P.-T.); (M.C.); (M.Z.); (K.M.)
| | - Katarina Matiaskova
- Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (K.S.); (N.H.); (I.B.); (K.P.-T.); (M.C.); (M.Z.); (K.M.)
| | - Katerina Nedbalcova
- Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (K.S.); (N.H.); (I.B.); (K.P.-T.); (M.C.); (M.Z.); (K.M.)
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