Epidemiology of bovine brucellosis in the Mexicali Valley, Mexico: data gathering and survey results.

Data for path analysis on the epidemiology of bovine brucellosis were gathered from 184 premises in Mexicali Valley, Mexico, that had dairy cattle, swine, and/or goats. Each farmer manager or owner was interviewed, using a pretested set of questions, and the livestock on the premises were serotested for Brucella antibodies. The focus in gathering these data was to identify the characteristics of premises with seropositive cattle in comparison with characteristics of premises with no seropositive cattle.