brucellin

bru·cel·lin

(brū-sel'in),
A preparation of antigenic material from several species of Brucella; used in the diagnosis of brucellosis as a skin test similar to that used for tuberculosis.

brucellin

(broo-sĕl′ĭn)
A protein extract of any species of Brucella. It formerly was used in human skin tests to diagnose brucellosis and is still used for that purpose by veterinarians. Agglutination tests and cultures are now preferred for human testing.