Oxytetracycline Residues in Milk After Intrauterine Infusion of Dairy Cows With Retained Fetal Membranes

Authors

  • R. P. Dinsmore Department of Clinical Sciences, CVMBS, Colorado State University
  • R. D. Stevens Department of Clinical Sciences, CVMBS, Colorado State University
  • M. B. Cattell Department of Clinical Sciences, CVMBS, Colorado State University
  • M. D. Salman Department of Clinical Sciences, CVMBS, Colorado State University
  • S. F. Sundlof Department of Physiological Sciences, College of Veterinary Medicine, University of Florida

Keywords:

milk residue, retained fetal membranes, oxytetracycline, duration, liquid chromatography

Abstract

Our objectives were to establish the duration, by high performance liquid chromatography, of milk residues of oxytetracycline (OTC) after intrauterine infusion of 5 g OT of cows with retained fetal membranes. We also determined the predictive values positive (PVPT) and negative (PVNT) of the Delvo-P (Gist Brocades), Cite Probe (ldexx), Charm Farm, and Charm II (Charm Sciences) tests for OT residues above 30 ppb, and above the stated minimum detection level of each test. Cows with mastitis were not included. Milk samples were collected from 50 cows at 24 hour intervals during treatment, and at 12 hour intervals after the cessation of treatment. The results of this work plus important implications for dairy practitioners will be discussed in this presentation.

Cover image of the 26th Conference Proceedings: A photo of the Albuquerque skyline during midday. In the foreground are skyscrapers, the scene is dotted with trees and scrub land, and a mountain rises behind the city. Yellow background.

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Published

1993-09-16

Issue

1993

Section

Research Summaries 2

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