Aseptic Meningitis Overview

Causes

With aseptic meningitis a person has signs and symptoms of meningitis, but bacteria do not grow in culture. Many different things can cause aseptic meningitis including viruses, fungi, tuberculosis, some medications, and infections near the brain or spinal cord, such as epidural abscesses.

Coxsackie virus and echovirus, two members of a family of viruses called enteroviruses, account for about half the cases of aseptic meningitis. Other enteroviruses, herpes viruses, and mumps are additional causes. The rate of these enteroviral infections increases in the summer and early fall.

West Nile virus is a cause of aseptic meningitis that has recently spread across the United States. Usually, West Nile virus causes a self-limited (gets better on its own, without treatment) meningitis. Infrequently, it causes a more severe illness, which may include encephalitis (inflammation in the actual brain tissue) or paralysis similar to that seen in polio. These severe forms ...