Meningitis is the inflamation of brain or spinal cord membranes, and is usually due to a viral infection, though bacterial and fungal infections can cause meningitis as well.
Meningococcal meningitis is caused by the bacteria Neisseria meningitidis (also known as meningococcus). Meningococcus is the most common cause of bacterial meningitis in children and teens. It is a leading cause of bacterial meningitis in adults. The infection occurs more often in winter or spring
