Meningitis is referred to as the inflammation (swelling) of meninges or membranes that cover the brain and the spinal cord. People of any age can be affected by the meningitis disease. The most common cause of meningitis is bacteria or viruses. However, microorganisms other than bacteria or viruses and certain medications (for example, amoxicillin, azathioprine, or methotrexate) or certain illnesses may also lead to meningitis. Fever, irritability, skin rashes, headache, drowsiness, and fits (seizures) are some of the most common signs and symptoms of meningitis. Signs and symptoms of infant meningitis might differ. They include jaundice, weak suck, and stiffness of the body and neck. Some of the major complications of meningitis are brain damage, hearing loss, epilepsy, vision loss, bone and joint problems, and loss of limbs (amputation). Patients suffering from meningitis can be diagnosed by their medical history, physical examination, and certain diagnostic tests. Meningitis diagnostic tests include laboratory tests and imaging studies that are primarily used to detect meningitis infection.