Connection with Livestock

Bacillus anthracis is typically a disease of plant-eating mammals, although it can affect other animals as well. Among domestic animals, cattle, sheep, and goats have been the most frequent victims. In most industrialized countries, livestock are routinely vaccinated, and cases of anthrax are rare. In developing countries, however, where animal vaccination is not regularly practiced, anthrax in animals is a problem. This is especially so in tropical and sub-tropical environments. In the USA, anthrax cases among animals have been generally limited to the western plains.

Source: http://www.csa.com/discoveryguides/anthrax/overview.php