Merck Manual

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Professional Version

Overview of Brucellosis in Large Animals

By

Paul Nicoletti

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

Medically Reviewed Jul 2013 | Modified Oct 2022

Brucellosis is caused by bacteria of the genus Brucella and is characterized by abortion, retained placenta, and to a lesser extent, orchitis and infection of the accessory sex glands in males. The disease is prevalent in most countries of the world. It primarily affects cattle, buffalo, bison, pigs, sheep, goats, dogs ( see Brucellosis in Dogs Brucellosis in Dogs ), elk, and occasionally horses. The disease in people, sometimes referred to as undulant fever, is a serious public health problem, especially when caused by B melitensis.

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