The commonest form of bacterial meningitis is caused by infection with Neisseria Meningitidis.

Meningococcal disease may present as meningitis (inflammation of the brain meninges) and/or septicaemia (blood poisoning) and is most common during the winter months.

Case definitions

Confirmed case: Clinical diagnosis of meningitis, septicaemia or other invasive disease AND at least one of: