摘要:Problem statement: Bacterial meningitis is one of the most important causes of mortality and morbidity. Rapid diagnosis of bacterial cause is very important and critical, because early antibiotic therapy prevents complications; different tests have been developed for rapid diagnosis of bacterial meningitis. One of them is CSF ferritin, which is evaluated in this study. Approach: During cross sectional study from 2008-2009 for 2 years, CSF was collects from 61 adults suspected to have meningitis. These patients admitted to Emam Reza and Sina hospitals of Tabriz. CSF was analyzed for ferritin, glucose, protein, cell count, culture and gram stains. Clinical data's were collected for all patients. Collected data