Anthrax: A Primer
Anthrax occurs sporadically in livestock in the United States and Canada; the disease is endemic in sheep, cows, and swine in Mexico.
This map shows recent outbreaks (red) of anthrax and 1990-1995 outbreaks (aqua) among livestock.
Note the October 2001 outbreak in cows in Santa Clara.
The discussion of human disease begins on the next page.