Meningitis is an inflammation of the meninges that surrounds the brain and spinal cord. It can be caused by bacterial, viral, or fungal infections. Bacterial meningitis is the most severe form and can be life threatening if not treated quickly with antibiotics. Common symptoms include fever, headache, stiff neck, nausea, confusion, and seizures. A lumbar puncture of cerebrospinal fluid can determine if the meningitis is bacterial or viral by examining the fluid for signs of infection. Early diagnosis and treatment are critical for recovery from bacterial meningitis.