Shigellosis (Shigella spp.)
1997 Case Definition
The 1997 case definition appearing on this page was previously published in the 1990 MMWR Recommendations
and Reports titled Case Definitions for Public Health Surveillance [MMWR 1990;39(RR13)]
(available at http://www.cdc.gov/mmwr/preview/mmwrhtml/00025629.htm).
Thus, the 1990 and 1997 versions of the case definition are identical.
Clinical description
An illness of variable severity characterized by
diarrhea, fever, nausea, cramps, and tenesmus. Asymptomatic infections
may occur.
Laboratory criteria for diagnosis
Case classification
Probable: a clinically
compatible case that is epidemiologically linked to a confirmed
case
Confirmed: a case that is laboratory confirmed
Comment
Laboratory-confirmed isolates are reported to CDC
via the Public Health Laboratory Information System (PHLIS),
which is managed by the Foodborne and Diarrheal Diseases Branch,
Division of Bacterial and Mycotic Diseases, National Center for
Infectious Diseases, CDC. Both probable and confirmed cases are
reported to the National Notifiable Diseases Surveillance System,
but only confirmed cases are reported to PHLIS. Confirmation
is based on laboratory findings, and clinical illness is not
required.
See also:
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