The 1990 case definition appearing on this page was re-published in the 1997 MMWR Recommendations and Reports titled Case Definitions for Infectious Conditions Under Public Health Surveillance [MMWR 1997;46(RR10)] (available at http://www.cdc.gov/mmwr/preview/mmwrhtml/00047449.htm). Thus, the 1990 and 1997 versions of the case definition are identical.
A syndrome characterized by acute onset of meningeal symptoms, fever, and cerebrospinal fluid pleocytosis, with bacteriologically sterile cultures. (See Encephalitis, Arboviral.)
Laboratory criteria for diagnosis
- No evidence of bacterial or fungal meningitis
Confirmed: a clinically compatible illness diagnosed by a physician as aseptic meningitis, with no laboratory evidence of bacterial or fungal meningitis
Aseptic meningitis is a syndrome of multiple etiologies, but many cases are caused by a viral agent.