Neisseria meningitidis subgroup Y, although commonly isolated from the nasopharynx, rarely has caused meningitis in nonmilitary individuals. Meningococcus (serogroup Y) caused pneumonitis, meningitis, and arthritis in a previously healthy woman. Findings from examination of spinal fluid were minimal, but the clinical aspects of the illness were similar to those seen with other meningococcal serotypes.
(JAMA 232:1354-1355, 1975)
Yee NM, Katz M, Neu HC. Meningitis, Pneumonitis, and Arthritis Caused by Neisseria meningitidis Group Y. JAMA. 1975;232(13):1354-1355. doi:10.1001/jama.1975.03250130038018