Code of Federal Regulations Title 21. Food and Drugs § 21.526.1698 Penicillin G procaine and novobiocin

(1)Penicillin G procaine equivalent to 100,000 units penicillin G and 150 milligrams (mg) novobiocin as novobiocin sodium;  or

(2)Penicillin G procaine equivalent to 200,000 units penicillin G and 400 mg novobiocin as novobiocin sodium.

(1) Amount. Infuse the contents of one syringe (equivalent to 100,000 units penicillin G and 150 mg novobiocin) into each infected quarter after milking. Repeat once after 24 hours.

(2) Indications for use. For the treatment of mastitis caused by susceptible strains of Staphylococcus aureus, Streptococcus agalactiae, Streptococcus dysgalactiae, and Streptococcus uberis in lactating cows.

(3) Limitations. For udder instillation in lactating cows only. Do not milk for at least 6 hours after treatment;  thereafter, milk at regular intervals. Milk taken from treated animals within 72 hours (6 milkings) after the latest treatment must not be used for food. Treated animals must not be slaughtered for food for 15 days following the latest treatment. If redness, swelling, or abnormal milk persists, discontinue use and consult a veterinarian.

(1) Amount. Infuse the contents of one syringe (equivalent to 200,000 units penicillin G and 400 mg novobiocin) into each quarter at dry off.

(2) Indications for use. For the treatment of subclinical mastitis caused by susceptible strains of Staphylococcus aureus and Streptococcus agalactiae in dry cows.

(3) Limitations. For udder instillation in dry cows only. Do not use less than 30 days prior to calving. Milk from treated cows must not be used for food during the first 72 hours after calving. Treated animals must not be slaughtered for food for 30 days following udder infusion.