"Swine and wild pigs (biovars 1, 2, 3), European hares (biovar 2), reindeer and caribou (biovar 4); B suis also in some other mammals"
Biovars 1 and 3 worldwide in swineraising regions except eradicated or nearly eradicated from domestic pigs in some countries; biovar 2 in wild boar in Europe; biovar 4 in Arctic
Probably Means of Spreading
Ingestion, direct contact with mucous membranes and broken skin
Clinical Manifestations in People
See Brucellosis in Large Animals and Brucellosis in Goats, Sheep & Camels