Three cases of probable neurobrucellosis are reported. The diagnosis was made on the basis of imunological tests. Two patients with a clinical picture of meningomyelitis showed a definitive clinical improvement under tetraciclin and streptomòcin therapy. The imunological reactions found in the record case were even more positive in the spinal fluid than in the blood. In the case 3 with a clinical presentation of cerebral hemorrage the hitopathological studies demonstrated non specific chronic leptomeningitis and local hemorrages in the caudate nucleus bilaterally. The diagnose and treatment of neurobrucellosis are discussed, stressing the importance of an early therapy.