The brain is protected by thin membranes called the meninges, with cerebrospinal fluid flowing between them to cushion the brain and allow safe movement inside the skull. When bacteria enter this fluid filled space, they spread rapidly around the brain, triggering an immediate immune response as white blood cells rush in to fight the infection. As these immune cells attack the bacteria, they release powerful inflammatory chemicals. This inflammation causes the meninges to swell and the normally

Meningitis is a serious condition in which the protective membranes surrounding the brain and spinal cord, called the meninges, become inflamed. These membranes normally act as a barrier and support system for the central nervous system. When they swell, pressure builds around the brain and spinal cord, interfering with normal nerve function and blood flow. Meningitis can develop quickly and may become life threatening within hours if not treated. The most common cause of meningitis is infection