[Passive hemagglutination, lymphoblastic transformation, and leukocyte migration applied to the diagnosis of brucellosis].

Passive hemagglutination test (HP) after binding of ABS antigen to SRBC by chromium chloride, lymphocyte transformation (TTL) and inhibition of leukocyte migration (TML) tests were compared to tube agglutination and complement fixation tests, and to clinical symptoms for diagnosis of brucellosis. Both TTL and TML persist for years after contact with brucella. HP is the most reliable serologic test.