Brucellosis is an infectious disease transmitted from various animal h
osts to man. In children the most common route of infection is unpaste
urized milk or milk products. Brucellosis affects the urinary tract un
commonly, most frequently causing orchioepididymitis. We report the ca
se of a 4-year-old boy with brucellosis who developed acute focal bact
erial nephritis (AFBN), documented by sonography, gallium scan, and co
mputed tomography. After appropriate treatment his symptoms and his so
nographic abnormality resolved completely. To the best of our knowledg
e, this is the first report of the association of AFBN and brucellosis
.