Meningitis is inflammation of the thin tissue that surrounds the brain and spinal cord, called the meninges. There are several types of meningitis. The most common is viral meningitis. You get it when a virus enters the body through the nose or mouth and travels to the brain. Bacterial meningitis is rare, but can be deadly. It usually starts with bacteria that cause a cold-like infection.
Meningitis: Symptoms, Causes, Types, Treatment, Risks, & More
Subacute meningitis is inflammation of the layers of tissue that cover the brain and spinal cord meninges and of the fluid-filled space between the meninges subarachnoid space when it develops over days to a few weeks. Chronic meningitis is slowly developing meningitis that lasts 4 weeks or longer. Symptoms are usually similar to those of acute bacterial meningitis headache, fever, and stiff neck but may also include confusion, hearing loss, and double vision. To diagnose chronic meningitis, doctors usually do imaging of the head, such as magnetic resonance imaging MRI , followed by a spinal tap lumbar puncture with analysis of the cerebrospinal fluid. See also Introduction to Meningitis. The brain and spinal cord are covered by three layers of tissue called meninges.
Meningitis is an inflammation of the meninges. The meninges are the three membranes that cover the brain and spinal cord. Meningitis can occur when fluid surrounding the meninges becomes infected. The most common causes of meningitis are viral and bacterial infections. Other causes may include:.