Brucellosis is a bacterial zoonosis that can affect sheep, goats, cattle, deer, elk, pigs, dogs, and several other animals. Humans become infected by coming in contact with animals, animal tissues or animal products that are contaminated with the Brucella bacteria. Frequently human infections are associated with direct contact with livestock, unpasteurized milk products, or preparing/cleaning game (feral swine) after hunting. In humans, brucellosis can cause a range of symptoms that are similar to the flu and may include fever, sweats, headaches, back pains, and physical weakness. Brucellosis can also cause long-lasting or chronic symptoms that include recurrent fevers, joint pain, weight loss, and fatigue.