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Oxytetracycline Persistence in Uterine Secretion after Intrauterine Administration in Cows with Metritis

SIMPLE SUMMARY: Puerperal metritis in cows involves the acute inflammation of the uterus, which is often treated with antibacterial drugs. Restrictions on the use of antibiotics in veterinary medicine require the very precise selection of an antibiotic based on its pharmacokinetics and on sensitivit...

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Autores principales: Mileva, Rositsa, Karadaev, Manol, Fasulkov, Ivan, Rusenova, Nikolina, Vasilev, Nasko, Milanova, Aneliya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9367300/
https://www.ncbi.nlm.nih.gov/pubmed/35953910
http://dx.doi.org/10.3390/ani12151922
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author Mileva, Rositsa
Karadaev, Manol
Fasulkov, Ivan
Rusenova, Nikolina
Vasilev, Nasko
Milanova, Aneliya
author_facet Mileva, Rositsa
Karadaev, Manol
Fasulkov, Ivan
Rusenova, Nikolina
Vasilev, Nasko
Milanova, Aneliya
author_sort Mileva, Rositsa
collection PubMed
description SIMPLE SUMMARY: Puerperal metritis in cows involves the acute inflammation of the uterus, which is often treated with antibacterial drugs. Restrictions on the use of antibiotics in veterinary medicine require the very precise selection of an antibiotic based on its pharmacokinetics and on sensitivity tests of pathogenic bacteria. This study aimed to evaluate the changes in oxytetracycline levels in uterine secretion over time after intrauterine administration in cows with metritis in relation to the sensitivity of pathogenic bacterial isolates. The concentrations of oxytetracycline in the uterine secretions were higher than the minimum inhibitory concentrations against pathogenic bacteria, provoking the infection of the uterus. Higher concentrations were measured in milk rather than in plasma. The intrauterine infusion of oxytetracycline for three consecutive days led to the alleviation of the inflammation and the restoration of the estrus cycle in cows. The local intrauterine administration of oxytetracycline requires the monitoring of the withdrawal time of milk to ensure consumer safety. ABSTRACT: Puerperal metritis in cows is often treated with antibacterial drugs. The prudent use of antibiotics in farm animals requires state-of-the-art knowledge of their pharmacokinetics and data from sensitivity tests of pathogenic bacteria. Changes in oxytetracycline levels in the uterine secretion over time after intrauterine administration in cows with metritis were evaluated in relation to the sensitivity of pathogenic bacterial isolates. Oxytetracycline levels in plasma, milk and uterine secretion were determined via LC–MS/MS analysis. Pathogenic bacteria were isolated and their sensitivity to oxytetracycline was determined. The concentrations of oxytetracycline in the uterine secretion were 433.79 (39.17–1668.76) µg·mL(−1) six hours after the third application at a dose of 8 mg/kg and 84.33 (1.58–467.55) µg·mL(−1) 96 h after the last treatment. These levels were higher than the minimum inhibitory concentrations—namely, between 4 and 64 µg·mL(−1)—against pathogenic isolates Trueperella pyogenes, Streptococcus intermedius, Escherichia coli and Bacillus pumilis. Higher concentrations over time were measured in milk rather than in plasma, indicating the need to monitor the withdrawal time for milk. The intrauterine infusion of oxytetracycline for three consecutive days resulted in the successful treatment of metritis in terms alleviating inflammation and restoring the estrus cycle in cows.
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spelling pubmed-93673002022-08-12 Oxytetracycline Persistence in Uterine Secretion after Intrauterine Administration in Cows with Metritis Mileva, Rositsa Karadaev, Manol Fasulkov, Ivan Rusenova, Nikolina Vasilev, Nasko Milanova, Aneliya Animals (Basel) Article SIMPLE SUMMARY: Puerperal metritis in cows involves the acute inflammation of the uterus, which is often treated with antibacterial drugs. Restrictions on the use of antibiotics in veterinary medicine require the very precise selection of an antibiotic based on its pharmacokinetics and on sensitivity tests of pathogenic bacteria. This study aimed to evaluate the changes in oxytetracycline levels in uterine secretion over time after intrauterine administration in cows with metritis in relation to the sensitivity of pathogenic bacterial isolates. The concentrations of oxytetracycline in the uterine secretions were higher than the minimum inhibitory concentrations against pathogenic bacteria, provoking the infection of the uterus. Higher concentrations were measured in milk rather than in plasma. The intrauterine infusion of oxytetracycline for three consecutive days led to the alleviation of the inflammation and the restoration of the estrus cycle in cows. The local intrauterine administration of oxytetracycline requires the monitoring of the withdrawal time of milk to ensure consumer safety. ABSTRACT: Puerperal metritis in cows is often treated with antibacterial drugs. The prudent use of antibiotics in farm animals requires state-of-the-art knowledge of their pharmacokinetics and data from sensitivity tests of pathogenic bacteria. Changes in oxytetracycline levels in the uterine secretion over time after intrauterine administration in cows with metritis were evaluated in relation to the sensitivity of pathogenic bacterial isolates. Oxytetracycline levels in plasma, milk and uterine secretion were determined via LC–MS/MS analysis. Pathogenic bacteria were isolated and their sensitivity to oxytetracycline was determined. The concentrations of oxytetracycline in the uterine secretion were 433.79 (39.17–1668.76) µg·mL(−1) six hours after the third application at a dose of 8 mg/kg and 84.33 (1.58–467.55) µg·mL(−1) 96 h after the last treatment. These levels were higher than the minimum inhibitory concentrations—namely, between 4 and 64 µg·mL(−1)—against pathogenic isolates Trueperella pyogenes, Streptococcus intermedius, Escherichia coli and Bacillus pumilis. Higher concentrations over time were measured in milk rather than in plasma, indicating the need to monitor the withdrawal time for milk. The intrauterine infusion of oxytetracycline for three consecutive days resulted in the successful treatment of metritis in terms alleviating inflammation and restoring the estrus cycle in cows. MDPI 2022-07-28 /pmc/articles/PMC9367300/ /pubmed/35953910 http://dx.doi.org/10.3390/ani12151922 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mileva, Rositsa
Karadaev, Manol
Fasulkov, Ivan
Rusenova, Nikolina
Vasilev, Nasko
Milanova, Aneliya
Oxytetracycline Persistence in Uterine Secretion after Intrauterine Administration in Cows with Metritis
title Oxytetracycline Persistence in Uterine Secretion after Intrauterine Administration in Cows with Metritis
title_full Oxytetracycline Persistence in Uterine Secretion after Intrauterine Administration in Cows with Metritis
title_fullStr Oxytetracycline Persistence in Uterine Secretion after Intrauterine Administration in Cows with Metritis
title_full_unstemmed Oxytetracycline Persistence in Uterine Secretion after Intrauterine Administration in Cows with Metritis
title_short Oxytetracycline Persistence in Uterine Secretion after Intrauterine Administration in Cows with Metritis
title_sort oxytetracycline persistence in uterine secretion after intrauterine administration in cows with metritis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9367300/
https://www.ncbi.nlm.nih.gov/pubmed/35953910
http://dx.doi.org/10.3390/ani12151922
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