FARM HEALTH NEWSLETTER MEDFORD VETERINARY CLINIC April 2014 Medford office 715-748-2341 Dr. H.H. Hildebrandt Dr. J.M. Osen Dr. M. Ortengren Colby office 715-223-2858 Dr. C.A. Miller Dr. B.M. Grandaw Dr. H.J. Grandaw www.medfordvet.com Dr. M.R. Moodie Dr. A.L. Ahles Serving the dairy industry by providing prevention, treatment, and promoting efficiency – since 1958 Bovine Viral Diarrhea Breeding Soundness Evaluation Clinic Most dairy farmers are aware of BVD virus and vaccinate against it and many farmers in our area have had problems with it. What you may not know is that it’s probably the most complex cattle virus today; even the best vaccinated herd could have serious BVD problems. BVD infects cattle as well as other ruminants like llamas and deer. It has two main groups, Type 1 and Type 2, based on genetic differences and those are split into different groups as well. The disease causes diarrhea, abortion, general illness, immunosuppression, and oral ulcers. Severity of the disease depends on the type and strain of the virus. Persistently infected animals (or PI) are cattle that got infected as a fetus and weren’t aborted. These cattle shed BVD virus their entire life and are the primary cause of most BVD problems. Vaccination is still a key part of BVD control. There are many different vaccines available that have different types of coverage--so be sure to consult with your herd vet on which one is best for you, if you haven’t already done so. Some vaccines only prevent against Type 1, some prevent Type 1 and Type 2, and some include protection against creating PI calves. Biosecurity is another key aspect of preventing BVD problems. Keeping a closed herd with no cattle movement onto your farm is great if possible but for most who buy cattle, testing and quarantining incoming animals is the next best thing. A quarantine period is also helpful for many other diseases, as shipment can cause subclinical disease to breakout. Testing for BVD can become a long process when you already have a problem; however, screening for prevention is simpler. The main goal of BVD screening is to find PI animals. This can be done by ear notching individual animals or using a bulk tank milk sample to screen for PI lactating cows. If you’ve never done these tests, talk to your vet to find out if you should. The North Central Wisconsin Cattleman’s Association (NCWCA) and UW-Extension Taylor County is holding a Breeding Soundness Evaluation Clinic. Bull’s will be examined for reproductive soundness including a semen evaluation to ensure your bull can get the job done. Nearly 1/3 of all bulls have reproductive inadequacies, including both beef and dairy. If you are using bulls, you should take advantage of this great and inexpensive service. The cost will be $45 per bull for non-NCWCA members and $30 for NCWCA members. The clinic will be held May 6th at the Taylor County Fairgrounds starting at 8 a.m. For timely service, 20 minute appointments will need to be made in advance. Call 715-657-0233 for more information and to schedule an appointment by April 23rd. LongRange Dewormer by Merial LongRange is a new injectable dewormer for cattle which works for 120-150 days and can be used on beef animals and dairy heifers under 20 months of age. This product was released last year and had exceptional results at increasing weight gains on pasture. It also had consistent reports of boosting health, reducing pinkeye, and fly control, which are not on label claims. Using another type of dewormer, you can get a one-time deworming up to one month duration with a product like Eprinex. The problem with animals on pasture is that once this dewormer wears off, the animal will simply be re-infected by the worm load on the pasture. To get real parasite control, you would have to use the pour-on monthly for 5 months. Since LongRange lasts for 5 straight months, all of the parasites on the pasture only have 2 options, die in the larvae stage on the pasture, or get killed by the treatment in the cattle. Ask us about starting to use LongRange when you turn cattle to pasture this Spring, even if it is in July!