Plasma pharmacokinetics and milk levels of ceftriaxone following single intravenous administration in healthy and endometritic cows

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This study investigated ceftriaxone pharmacokinetics and milk levels in healthy and endometritic cows, finding detectable plasma levels for 8 hours and milk levels for 36 hours, supporting a 9 mg/kg dose every 6 hours for endometritis.

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This study investigated the plasma pharmacokinetics and milk concentrations of ceftriaxone after a single intravenous dose in healthy versus endometritic cows, using a three-compartment open model to characterize disposition. Ceftriaxone was detectable in plasma up to 8 hours, with reported parameter differences between groups, and it persisted in milk for 36 hours post-administration. The authors used an MIC90 of 0.5 μg/mL to propose a ceftriaxone dosing regimen for endometritis (9.0 mg/kg repeated every 6 hours), with the main caveat implied by the single-dose, limited observation window and reliance on MIC90 for regimen selection. This paper is centrally about endometriosis and/or adenomyosis—relevance to endometriosis is not explicit, but the paper directly studies bovine endometritis (uterine inflammation) as a closely related reproductive tract condition included in the endometriosis/adenomyosis research corpus.

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Abstract

Pharmacokinetics and milk levels of ceftriaxone were studied in healthy and endometritic cows following single intravenous administration. The drug was detected up to 8 h of dosing in plasma of healthy and endometritic cows and the drug disposition followed three-compartment open model. The values of Vd(area), AUC, t(1/2beta), Cl(B), MRT and P/C ratio were 0.50 +/- 0.19 L.kg(-1), 62.2 +/- 23.3 microg.ml(-1).h, 1.02 +/- 0.07 h, 0.30 +/- 0.09 L.kg(-1).h(-1), 1.55 +/- 0.25 h and 0.52 +/- 0.27, respectively, in healthy and 1.55 +/- 0.52 L.kg(-1), 37.0 +/- 17.1 microg.ml(-1).h, 1.56 +/- 0.25 h, 0.56 +/- 0.14 L.kg(-1).h(-1), 2.14 +/- 0.34 h and 1.44 +/- 0.60, respectively, in endometritic cows. The drug was detected in milk for 36 h after administration. For MIC(90) of 0.5 microg.ml(-1) the most appropriate dosage for ceftriaxone, would be 9.0 mg.kg(-1) repeated at 6 h intervals for the treatment of endometritis in cows.
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Abstract

Pharmacokinetics and milk levels of ceftriaxone were studied in healthy and endometritic cows following single intravenous administration. The drug was detected up to 8 h of dosing in plasma of healthy and endometritic cows and the drug disposition followed three-compartment open model. The values of Vdarea, AUC, t1/2β, ClB, MRT and P/C ratio were 0.50 ± 0.19 L.kg−1, 62.2 ± 23.3 μg.ml−1.h, 1.02 ± 0.07 h, 0.30 ± 0.09 L.kg−1.h−1, 1.55 ± 0.25 h and 0.52 ± 0.27, respectively, in healthy and 1.55 ± 0.52 L.kg−1, 37.0 ± 17.1 μg.ml−1.h, 1.56 ± 0.25 h, 0.56 ± 0.14 L.kg−1.h−1, 2.14 ± 0.34 h and 1.44 ± 0.60, respectively, in endometritic cows. The drug was detected in milk for 36 h after administration. For MIC90 of 0.5 μg.ml−1 the most appropriate dosage for ceftriaxone, would be 9.0 mg.kg−1 repeated at 6 h intervals for the treatment of endometritis in cows. Similar content being viewed by others

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Author information Authors and Affiliations Corresponding author Rights and permissions About this article Cite this article Kumar, S., Srivastava, A.K., Dumka, V.K. et al. Plasma pharmacokinetics and milk levels of ceftriaxone following single intravenous administration in healthy and endometritic cows. Vet Res Commun 34, 503–510 (2010). https://doi.org/10.1007/s11259-010-9421-2 Accepted: Published: Issue date: DOI: https://doi.org/10.1007/s11259-010-9421-2

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endometriosisdisambig:endometritis

MeSH descriptors

Cattle Diseases Ceftriaxone Ceftriaxone Endometriosis Milk Animals Anti-Bacterial Agents Anti-Bacterial Agents Anti-Bacterial Agents Anti-Bacterial Agents Anti-Bacterial Agents Area Under Curve Cattle Cattle Diseases Ceftriaxone Ceftriaxone Ceftriaxone Endometriosis Endometriosis Female

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