[Brain abscess caused by Nocardia sp in immunosuppressed patient].

Patient with autoimmune haemolytic anaemia and thrombocytopenic purpura (Evans Syndrome), treated with immunosuppressive therapy (prednisone and azathioprine) developed brain abscess unresponsive to antimicrobial therapy, in spite of its 23 days duration. Diagnosis could be possible after recover secretion of peribulbar abscess and maintenance of this material over seven days in incubation.