Brucellosis is a bacterial disease caused by various Brucella species, which mainly infect cattle, swine, goats, sheep and dogs. Humans generally acquire the disease through direct contact with infected animals, by eating or drinking contaminated animal products, or by inhaling airborne agents. The majority of cases are caused by ingesting unpasteurized milk or cheese from infected cattle or goats or sheep.
Mongolia is one of the highest brucellosis prevalence countries in the world. Human brucellosis surveillance initiated in Mongolia in 1958 and there has been generally decreasing trend of the diseases in the country. Most cases of disease occur in the spring and summer. Generally, the incidence is much higher in Eastern region.
