Clinical DescriptionA syndrome characterized by acute onset of meningeal symptoms, fever, and cerebrospinal fluid pleocytosis, with bacteriologically sterile cultures. (See Encephalitis, arboviral.)
Laboratory Criteria For DiagnosisNo evidence of bacterial or fungal meningitis
ConfirmedA 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.
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.1 Thus, the 1990 and 1997 versions of the case definition are identical.
1. CDC. (1997). Case Definitions for Infectious Conditions Under Public Health Surveillance. MMWR, 46(RR-10), 1-55. https://www.cdc.gov/mmwr/preview/mmwrhtml/00047449.htm