Retention Data for Antibiotics Commonly Used for Bovine Infections

Abstract
The maximum time that various antibiotics used in different ways as treatment of bovine infections persisted in milk after final treatment was studied. Delvotest-P and Bacillus stearothermophilus disc assays 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.

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