However, there is a rare form that is extremely dangerous and can be lethal without prompt treatment. Meningitis is an inflammation of the meninges, the membranes that surround the brain and spinal cord. It s usually caused by a viral or bacterial infection, although other types of infections can lead to meningitis. Sometimes, meningitis has other causes, such as a brain tumor. Viral meningitis, the most common kind, tends to be much less severe than bacterial.
Characteristic symptoms are a headache and stiff neck.
This disease is generally self-limiting, meaning it goes away on its own without treatment. Still, it is wise to see a doctor when you suspect any form of meningitis, especially in a young child. If it turned out to be bacterial, rather than viral meningitis, immediate treatment is essential. Previously, Hib was the leading cause of bacterial meningitis. Today, most cases are caused by Streptococcus pneumonia or Neisseria meningitidis bacteria.