Livestock Management RANCHING
Heed This Advice on Anaplasmosis Tips for controlling infectious outbreaks in cattle operations
I
T IS DIFFICULT TO QUANTIFY THE RISK OF ANAPLASMOSIS IN ANY given herd at any given time of year, but when an
outbreak occurs, it can result in devastating conse- quences for a cow-calf herd. Anaplasmosis is most commonly caused by Ana-
plasma marginale, a microorganism that invades red blood cells and causes severe anemia. Transmitted through the blood, the main culprits in spreading the disease include biting fl ies or ticks, or infected blood transferred on contaminated needles or other equip- ment. The disease can result in death, aborted calves, bull infertility, weight loss and diminished milk pro- duction, as well as additional treatment expenses. The risk for disease increases when non-infected cattle mingle with those that carry the disease or when environmental conditions favor increased activity of biting fl ies or ticks. “Anaplasmosis is sporadic; not all factors that cause outbreaks in a herd are known but when they occur,
consequences can be signifi cant,” said Daniel Scruggs, DVM, managing veterinarian with Zoetis. Anaplasmosis causes special concern for cow/calf
producers since mature animals have higher suscep- tibility to the disease than younger animals. Cows in the late stage of pregnancy and those nursing calves have particularly high death loss. Signs of anaplasmosis can include:
• Orange-yellow coloration of the mucous membranes • Thin, watery blood • Slow, reluctance to move, or shortness of breath • Aggressive behavior shortly before death • Sudden, unexplained death of adult cattle • Abortions One of the most commonly used and predictable
methods of controlling anaplasmosis includes incorpo- rating a feed-grade chlortetracycline, such as AUREO- MYCIN®, in the animal’s feed or mineral supplements. In endemic regions where ticks and fl ies remain active
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56 The Cattleman July 2016
thecattlemanmagazine.com
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