RESUMEN
A total of 11 patients with listeriosis wereadmited to the Hospital Emilio Ribas - Säo Paulo, Brasil. The etiology Listeria monocytogenes in 2 Aids and Listeria spp in underlying conditions was established in the other patients. The age ranged from 20 to 60 years old and white: black; male:famele ratio was 3:1 for all them. Acute meningoencephalitis in 11; renal failure in 2; acute respiratory failure, septicemia and AIDS with drug multiform exantema, respectively in 1 were observed. Leukocytosis > 500 cells/mm elevado ao cubo; glucose < 45 mg/dl; protein > 90 mg/dl and Gram-positive rod strains with positive culture to Listeria spp were revealed in the cerebrospinal fluid study. These strains were resistant to betalactamin; colistin; streptomycin and amikacin and sensitive to kanamicin; gentamicin; tetracicline; erytromicin and chloramphenicol. Monotherapy (ampicillin) or associate (ampicillin/chloramphenicol) had not influence on death or improvement during the follow-up of patients. Listeral meningoencephalitis is similar to tuberculosis or other bacterial meningitis include in cerebrospinal fluid chemistries data