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Canine brucellosis or beagle fever is a zoonotic bacterial reproductive disease of dogs, caused by Brucella canis and occasionally by Brucella abortus, B. melitensis and B. suis. The actual seroprevalence of canine brucellosis in India is unknown and not yet studied in Kerala. A total of 131 animals presented to the outpatient unit of medicine, gynaecology and obstetrics of the two University Veterinary Hospitals at Mannuthy and Kokkala with clinical signs of epididymitis, orchitis, abortion, still birth, foetal resorption, foetal mummification, foetal maceration, neonatal death and infertility were randomly selected for the study. Paired sera samples were collected on the day of presentation and after three weeks of presentation for Rose Bengal Plate Test (RBPT). In this study, sera samples from forty-seven (35.88 per cent) infected dogs showed agglutination on RBPT using B. abortus S99 antigen. Out of forty-seven RBPT positive samples, 80.85 per cent (38/47) were female and 19.15 per cent (9/47) were male dogs. The high seroprevalence of canine brucellosis in this study is attributed to the endemicity of bovine brucellosis in the study area.