Last updated: July 26. 2014 10:41PM - 509 Views
Robert Bourne



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Summer time often brings a few infectious ailments to beef cows. Common problems include eye infections and foot rot. Treatment of affected cows will often involve the use of antibiotics. On very rare occasions violative residues of pharmaceutical products have been found in carcass tissues of cull beef cows. Violations of drug residue regulations can result in expensive fines (or even worse, jail time) for the rancher and a “black-eye” for the entire beef industry. It is vital that cow calf producers have a close working relationship with a large animal veterinarian in their area. If a cow has an infection or disease that must be treated, her owner should closely follow the veterinarian’s directions, and also read the label of the product used. Most of these medications will require that the producer keep the treated animal for the label-directed withdrawal time. The Oklahoma Beef Quality Assurance Manual contains the following discussion of medication withdrawal times.


A withdrawal time may be indicated on the label of certain medications. This is the period of time that must pass between the last treatment and the time the animal will be slaughtered or milk used for human consumption. For example, if a medication with a 14-day withdrawal period was last given on August 1, the withdrawal would be completed on August 15 and that would be the earliest the animal could be harvested for human consumption. All federally approved drugs will include the required withdrawal time for that drug on the product label or package insert. These withdrawal times can range from zero to as many as 60 days or more. It is the producer’s responsibility to be aware of withdrawal times of any drugs used in their operation. Unacceptable levels of drug residues detected in edible tissues collected at harvest may result in traceback, quarantine, and potential fines or jail time. Substantial economic losses may result for the individual producer as well as negative publicity for the entire beef industry…” Producers are responsible for residue problems and should follow these four rules: 1. If ever in doubt, rely on the veterinarian-client-patient relationship you have established with your veterinarian.


2. Use only medications approved for cattle and exactly as the label directs or as prescribed by your veterinarian.


3. Do not market animals for food until the withdrawal time listed on the label or as prescribed by the veterinarian has elapsed.


4. Keep well organized, detailed records of pharmaceutical products given to individually identified animals. Include in the record, the date of administration, route of administration, dosage given, lot or serial number of product given, person delivering the product, and label or prescription listing of withdrawal dates. Examples of Beef Quality Assurance records can be found in the Oklahoma Beef Quality Assurance Manual website at the menu item “Record Keeping Forms” . Records should be kept for 3 years after sale of the animal.


If you have any questions, or would like further information on this or other related management topics, visit us on the west end of the Clay Jones Community Building at 1901 S. 9th Avenue in Durant, or call (580) 924-5312.


The Oklahoma Cooperative Extension Service offers its programs to all eligible persons regardless of race, color, national origin, religion, sex, age, disability, or status as a veteran, and is an equal opportunity employer.


Upcoming events:


August 9 – Southern Plains Beef Symposium and Trade Show, Ardmore Convention Center. $30 advanced ticket and $40 at the door. For more information contact Carter County OSU Extension at 580-332-6570.


August 20 – Southeast District Extension Coffee Shop, 7 am to 8 am at the Bryan County Extension Office. Producers will be able to visit with District Extension staff via internet. If interested in attending please contact the Extension Office.


A Master Gardener Certification Classes will be held at the Bryan County Extension Office beginning in early October. Please call for more information.

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