Objectives: FUO is one of the unresolved challenges in medicine despite the presence of modern diagnostic facilities and therapeutic advancement. The
prevalence of FUO in hospitalized patient is reported approximately 3% and has a higher impact on health care system. Among the infective causes of
FUO, more than 3% cases are due to Brucellosis. Brucellosis is a zoonotic disease and occurred mainly in occupationally exposed individuals such as
farmers, veterinarians, slaughter house workers, cattle handlers, and meat inspectors (risk group). As Bangladesh is a developing country many livestock
based industries are developed within the last 10 years. As a result the chance of human Brucellosis also increased. The true incidence of Human
Brucellosis in our country is not known. The purpose of this study is to find out the prevalence of Brucellosis among the occupationally exposed FUO
patients.