Emergence of Neisseria meningitidis serogroup X in the 2017/2018 Cerebrospinal Meningitis outbreak, Nigeria.

Neisseria meningitidis is the commonest cause of meningitis outbreaks; Streptococcus pneumoniae and Haemophilus influenzae causes. B Background: b Outbreaks of meningitis occur periodically in Nigeria, with the northern parts mostly affected. The increasing incidence of Neisseria meningitidis X is worrisome, because the reactive and preventive vaccination for meningitis does not cover this serogroup, countries in the African meningitis belt must prepare to face this potential new challenge. [Extracted from the article]