A total 13 800 cattle were examined serologically and 399 bacteriologically for leptospirosis. The samples of sera were tested by the microscopic agglutination test using 17 antigens from 16 serogroups of Leptospira spp. Specific antibodies were found in 29 per cent of animals. Most often there were recorded the titers against the antigens of serovars of the Sejroe serogroup (21%). The pathogens were isolated from 5 cows. The isolates were identified as belonging to the hardjo serovar.