One hundred and thirteen samples of CSP from eight patients with chronic meningitis were studied in a 12 years period (September, 1980 - August, 1992). None of them had AIDS. In all, CNS histoplasmosis diagnosis was made by CSF examination. All eases, tested positive for antibodies to Histoplasma capsulatum in CSF; in one case the yeast gro-wed in Sabouraud culture in three different occasions. The main findings in CSF by the time of the diagnosis were: moderate hypercytosis marked by lymphocytes and monocytes, neutrophils-being present and in some cases eosinophil cells; moderate increase of total proteins content; decrease in the glucose content; and moderate increase of gamma globulins sometimes with oligoclonal reaction. Patients were followed-up from 7 to 102 months, and periodically submitted to CSF examinations according to clinics. Cell number and total protein content of CSF showed marked episodes of exarcebation in the follow-up, with a dissociated profile favoring total protein content which got higher with the chronification of the disease. Changes in the CSF pattern with treatment were: rapid decrease of hypercytosis; disappearence of neutrophil and eosinophil cells; increase in glucose content; and slow reduction of the increased contents of total proteins and gamma globulins.
histoplasmosis; central nervous system; cerebrospinal fluid; chronic meningitis