Meningitis is an inflammation (swelling) of the meninges in the human brain. Meninges are the three membranes that cover the brain and spinal cord. Meningitis can occur when fluid surrounding the meninges becomes infected with virus or bacteria.
The most common causes of meningitis are viral and bacterial infections. Other causes may include:
- cancer
- chemical irritation
- fungi
- drug allergies
Both, viral and bacterial meningitis are contagious. Meningitis can be transmitted to other people by coughing, sneezing, or close (physical) contact.
Meningitis can be fatal if not treated quickly. It can cause life-threatening blood poisoning (septicaemia) and lead to a permanent damage to the brain or nerves. Between 5 to 40 percent of children and 20 to 50 percent of adults with this condition die.
Some available Meningitis vaccination services can offer some protection against meningitis.