BOVINE BRUCELLOSIS DIAGNOSIS IN MILK BY RING TEST AND ELISA IN DAIRY FARMS OF NUBLE (VIII-REGION, CHILE)

ELISA and Ring Test were compared as diagnostic tests for bovine bruce llosis in bulk tank refrigerated milk from 60 dairies in the Nuble Pro vince, VIII Region, Chile, from November to December. Samples were str atified according to the number of cows in the farm. Diagnosis obtaine d from both methods gave similar results: is positive and 42 negative. The difference was established in 5 samples (8.3%) that were classifi ed as weak positive to the Ring Test and confirmed as positives by ELI SA. Furthermore, it was determined that there was 30% prevalence of bo vine brucellosis in dairies with refrigerated tanks in the Nuble provi nce. The ELISA proved to be a reliable diagnostic test of bovine bruce llosis in bulk milk.