ECHO virus type 9 meningitis simulating tuberculous meningitis.

An infant with mononuclear pleocytosis, hypoglycorrhachia, and elevated protein in cerebrospinal fluid emphasizes the occasional difficulty in distinguishing viral and tuberculous meningitis at the time of presentation. Although the cerebrospinal fluid values were compatible with tuberculous meningitis, ECHO virus type 9 was grown from the spinal fluid.