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Brucellosis in Horses

By

Paul Nicoletti

, DVM, MS, DACVPM (Deceased), College of Veterinary Medicine, University of Florida

Last full review/revision Sep 2019 | Content last modified Oct 2019

Brucellosis in horses is caused by Brucella abortus or Brucella suis bacteria. The infection is rare, especially in the USA and other countries that have control programs for the infection in food animals. It can cause abortion, infection of the sexual organs in stallions, and infertility. The disease is present in most countries of the world. The most common abnormality associated with brucellosis in horses is suppurative bursitis, a pus-filled inflammation of connective tissue over the shoulders or poll. It is commonly called fistulous withers or poll evil Fistulous Withers and Poll Evil Depending on the condition, joint disorders can affect the joint membranes, surrounding tendons, underlying bone, cartilage, bursae, and/or fluid within the joint (synovial fluid). Arthritis... read more . Infection is diagnosed through laboratory tests that isolate the bacteria in the blood, semen, or milk of the infected horse or blood tests that detect antibodies to the bacteria. Antibiotics are the usual treatment, although elimination of the infection is difficult to accomplish. It is unlikely that infected horses are a source of the disease for other horses, other animals, or people.

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Calcium, in its ionic form, plays a key role in the function of many body systems. Precise control of calcium ion concentrations in extracellular fluids is regulated by several hormones. Which of the following is NOT involved in calcium homeostasis?
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