Was researching 'brucellosis' and ironically this article showed up as a recent update in my Google search. What I have read up to the point of noticing this article is that brucellosis is rare in humans in the U.S. primarily because there are vaccines that are administered to the animals. The most likely human candidates to acquire this bacterial infection aside from animals are lab workers, veterinarians and ranchers; and THEN the people they have come into 'personal' contact with via fluid transmissions. Furthermore, brucellosis can be acquired via inhalation which is why it is considered a bio-terrorism agent.