Aim: Outbreak of bovine brucellosis in 
                              buffaloes aborted in a village Mahuan of District 
                              Mainpuri, Uttar Pradesh is described. 
                              
                              Materials 
                              and Methods: A total of 15 serum samples were 
                              collected from a aborted buffaloes. All the sera 
                              samples were tested by serological tests, Rose 
                              Bengal Plate Test (RBPT) and Standard Tube 
                              Agglutination Test (STAT). 
                              
                              Results: 
                              Clinical history of the condition complimented 
                              with detailed examination of the affected animals 
                              revealed that 50% (15/30) buffaloes were aborted 
                              between 6-9.5 months of pregnancy. The main 
                              clinical signs presented were fever, discharge 
                              from vagina and retention of placenta. There was 
                              no response of treatment on buffaloes. The 
                              antibodies against B. abortus were detected in 
                              7(46.6%) sera samples by RBPT and in 5(33.3%) by 
                              STAT. 
                              
                              Conclusion: The buffaloes involved 
                              and the severity of abortions, that necessitated 
                              veterinary intervention, it would be necessary to 
                              asses the prevalence and economic importance of 
                              the disease in rural herds of Uttar Pradesh. 
                              
                              
                              Keywords: brucellosis, buffaloes, Mainpuri 
                              district, outbreak, RBPT, STAT