[Occurrence of leptospiral antibodies in dogs in Brno and the surrounding area].

A serological examination by the microagglutination reaction of lysis (RMAL) was performed with 12 leptospira strains to investigate 1272 blood serums of dogs coming for various kinds of treatment to the outpatient ward of the veterinary hospital. The higher infestation rate was recorded in the dogs from outside the city (14.08%) than in the city dogs (7.96%). A considerably high infestation was found in the dogs of the service breeds (13.47%). The males were infested more frequently (10.99%) than the bitches (7.22%). As for age, young dogs until the age of one year were found to be infested more frequently. Separate significant titres were demonstrated with the leptospira of the Grippotyphosa, Icterohaemorrhagiae, Sejroe, and Australis (L. bratislava) serological groups. Reactions with the leptospira of other groups were recorded only at low titres: they were as coagglutinations with parallel high-titre reactions with the leptospira of the Grippotyphosa and Icterohaemorrhagiae groups.