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Retention Data for Antibiotics Commonly Used for Bovine Infections¹

Department Dairy Science, Clemson University, Clemson, SC 29631

ABSTRACT

This study was designed to observe the maximum time that various antibiotics used in different ways as treatment of bovine infections persisted in milk after final treatment. Both Delvotest-P and Bacillus stearothermophilus (Difco) disc assay procedures were utilized for detection of antibiotic preparations used for treatment of mastitis. None persisted in milk longer than specified on their respective labels. Because antibiotic residues were detected in milk consequent to treatment for intrauterine infections, guidelines for withholding times following intrauterine treatment should be established.

¹ Technical Contribution No. 2156 of the South Carolina Agricultural Experiment Station, Clemson University.

² Department Dairy Science, Louisiana State University, Baton Rouge.