The brain and spinal cord are surrounded by layered membranes, known as meninges, and cerebrospinal fluid. In certain instances, this lining becomes inflamed and the cerebrospinal fluid (CSF) is also affected. This condition is known as meningitis and may increase pressure on the brain and spinal cord, causing a range of generalized and localized symptoms. Meningitis is a serious condition and is potentially fatal.
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