Fil: Lucero, Nidia E. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Servicio Brucelosis; Argentina.Fil: Maldonado, Patricia L. Hospital Juan A. Fernandez. Servicios de Infectología y Microbiología; Argentina.Fil: Kaufman, Sara. Hospital Juan A. Fernandez. Servicios de Infectología y Microbiología; Argentina.Fil: Escobar, Gabriela I. Institutos de Zoonosis Luis Pasteur; Argentina.Fil: Boeri, Eduardo. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Servicio Brucelosis; Argentina.Fil: Jacob, Néstor R. Hospital Cosme Argerich. Infectología; Argentina.From the blood culture of an HIV-positive patient with a febrile syndrome (CD4 count 385 cells/microL and viral load nondetectable), Brucella canis was isolated. The patient was presumptively infected from his dogs, which tested positive, and showed good outcome after the therapy with doxycycline-ciprofloxacin, and the HIV infection would seem not to have been influenced by brucellosis. To our knowledge, no other case of B. canis in the setting of HIV infection has been reported in the literature, and the emerging zoonotic potential of the disease in urban areas should be considered.