The aim of this study was to evaluate the clinical, laboratory findings, and therapeutic features of patients with brucellosis. The diagnosis was made by clinical findings, positive agglutination titer. and/or the isolation of Brucella species. Three hundred and twenty-two cases were acute, 121 sub-acute, 24 chronic, and 13 asymptomatic. Symptoms of patients were malaise in 432 (90%) patients, sweating in 405 (184.4%), arthralgia in 393 (81.9%), fever in 383 (79.8%), and back pain in 281 (58.5%). The most frequent findings were fever in 187 (39%) patients, hepatomegaly in 102 (21.3%). osteoarticular involvement in 91 (19%), splenomegaly in 68 (14.2%), nervous system involvement in 31 (6.5%) patients. Lymphocytosis was determined in 328 patients, anemia in 262 patients, thrombocytopenia in 35 patients, leukopenia in 37 patients, leukocytosis in 31 patients. and elevated erythrocyte sedimentation rate in 282 patients. Cultures were positive in 194 (45%) patients and all strains were identified as Brucella melitensis. Various treatment regimens were given to patients, No therapeutic failure was observed. The time to defervescence ranged from 2 to 15 days. Relapse occurred in 26 of the 480 patients (5.4%). There was no correlation between relapse and positive culture or complications. Brucellosis can present various clinical forms in endemic areas and mimics several diseases. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.