CENTRAL-NERVOUS-SYSTEM MANIFESTATIONS OF HUMAN EHRLICHIOSIS

Since 1989, we have confirmed the diagnosis of human ehrlichiosis in 5 7 patients, Although routine radiological studies of the central nervo us system (CNS) or analyses of cerebrospinal fluid (CSF) samples were not done for these patients, primary care physicians detected symptoms or signs that prompted them to perform such studies, CSF samples were examined for 15 of the 57 patients. Findings in eight of the 15 CSF s amples were abnormal, and the most common abnormalities were lymphocyt ic pleocytosis and elevated protein levels, A search of the English-la nguage literature revealed 21 additional cases in which CSF examinatio ns were performed; in 13 of these cases, CSF findings were abnormal, T he most common clinical finding that predicted CSF abnormalities was a change in mental status. A total of 14 patients underwent computerize d tomographic studies, and none of these studies showed abnormalities, Four (19%) of the 21 patients with CNS manifestations of ehrlichiosis and abnormal CSF findings died.