Via press release from the NYC Health Department:
The Health Department is currently investigating a cluster of invasive meningococcal disease, commonly known as meningitis, among gay men and men who have sex with men. Invasive meningococcal disease is a severe bacterial infection that has a high fatality rate. Within the past four weeks, there have been four cases; one died and one person is in critical care. The cases are spread across several boroughs and among men ages 31 to 42 years old. The most recent four cases have all been among HIV infected men. People living with HIV are at a greater risk than the general population of acquiring invasive meningococcal disease and if infected, dying from infection. This disease is spread by prolonged close contact with nose or throat discharges from an infected person. Examples of prolonged contact include living in the same household or intimate activities, including kissing and sexual contact.
A list of symptoms is at the link. (Tipped by JMG reader Eric)