A Rare Case of Pyrexia of Unknown Origin (PUO) Secondary to Brucellosis Associated with Kikuchi's Lymphadenitis

Pyrexia of unknown origin (PUO) is a challenging medical problem, which acts as a burden to the patient and the family especially in resource-limited countries like India. Brucellosis is a highly contagious zoonotic infection which spreads through the consumption of unpasteurized milk and undercooked meat. Lymphadenopathy can be the presenting feature for brucellosis but it can also be secondary to other systemic diseases. Here we report a rare case of a young female with PUO secondary to brucellosis that had persistent fever and lymphadenopathy even after adequate treatment and on subsequent investigations was found to have Kikuchi's lymphadenitis.