A serological survey for brucellosis in Canadian swine

The results of a survey which included the testing of 21,275 blood samples collected at various slaughter houses are described.Sixty-three herds had a single reactor with a titre of 1:100 or higher to a tube or plate agglutination test. Investigations in forty-five of these herds failed to detect the presence of brucellosis in the remaining mature swine.The prompt slaughter of the reactors may have eliminated possible sources of infection.