[Seroepidemiological investigations on the incidence of Brucella canis antibodies in man (author's transl)].

1915 serum samples of humans were examined in the serum tube agglutination test for antibodies to Brucella canis. 1400 random samples were from blood-donors, 480 samples from clinical patients and 35 samples from persons, exposed to dogs and material infected with Br. canis. Agglutinating antibodies to Br. canis antigen were detected in 6 sera (titers 1 X 1:400, 2 X 1:200, 3 X 1:100). In 3 cases positive results were confirmed by complement fixation and indirect immunofluorescence tests. All serum samples with agglutinating antibodies were from healthy blood-donors. Serum samples from patients, and from 7 veterinary surgeons, 9 laboratory assistants and 19 animal care-takers had no agglutinating antibodies to Br. canis in a serum dilution of 1:50.