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Effect of Intrauterine Infusion of Penicillin-Streptomycin and Furacin¹ and Vaginal Deposition of Furacin on Chemical Residue Levels in Milk^,2

Department of Dairy Science, Clemson College, Clemson, South Carolina

ABSTRACT

The milk from 25 dairy cows was examined for chemical residues, using the disc assay technique, following intrauterine infusion of penicillin-streptomycin and Furacin and vaginal deposition of Furacin. Milk samples were collected during the 12- to 96-hr period after the single treatment with antibiotics. They were collected over a 3-wk period during the extended Furacin treatment with suppositories. No chemical residues were found in any of the milk samples from animals subjected to the three types of treatment. There was no evidence of Furacin build-up during the 3-wk treatments.

¹ Trade name for 5-nitro, 2-furaldehyde semicarbazone, and a product of Eaton Laboratories, Norwich, N. Y.

² Technical contribution No. 414, South Carolina Agricultural Experiment Station, Clemson Agricultural College, Clemson, South Carolina, and published with the approval of the Director.