Massive diarrhoea and sepsis due to an infection with Neisseria meningitidis serogroup W.

Invasive meningococcal disease is associated with significant mortality. Classic presentation consists of high fever, headache and neck stiffness. Neisseria meningitidis serogroup W may present with atypical symptoms, which complicates recognition. Furthermore, it is associated with a high case fatality rate.