Meningitis is inflammation of the meninges, the membranes covering the brain and spinal cord. Meningitis can be caused by various infectious agents, including viruses, fungi, and protozoans, but bacteria produce the most life-threatening forms. Meningitis is an inflammation of the fluid and membranes around the brain and spinal cord. It can be caused by viral, bacterial, or fungal infections and requires emergency medical treatment. Learn about the symptoms, types, causes, treatments, and prevention of meningitis . Meningitis is a disease in which you experience inflammation of the protective membranes (meninges) surrounding the brain and spinal cord. Read on to learn the major causes, symptoms and treatment. Meningitis is the inflammation of the tissues surrounding the brain and spinal cord, which can be infectious or non-infectious and life-threatening. Learn about the different types of meningitis , how they are transmitted, what are the signs and complications, and how to prevent them with vaccines.