Neisseria meningitidis, Serogroup Y

**Definition:** Strains of Neisseria meningitidis which, in the United States, causes disease in mostly adults and the elderly. Serogroup Y strains are associated with PNEUMONIA.

**Tree numbers:** - B03.440.400.425.550.550.641.820 - B03.660.075.525.520.500.820

**Synonyms:** - Meningococcus, Serogroup Y - Meningococci, Serogroup Y