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Measles (Rubeola)
1990 Case Definition
Clinical case definition
An illness characterized by all of the following
clinical features:
- a generalized rash lasting greater than or
equal to 3 days
- a temperature greater than or equal to 38.3°C
(101°F)
- cough, or coryza, or conjunctivitis
Laboratory criteria for diagnosis
- Isolation of measles virus from a clinical
specimen, or
- Significant rise in measles antibody level
by any standard serologic assay, or
- Positive serologic test for measles IgM antibody
Case classification
Suspect: any rash
illness with fever
Probable: meets the clinical case definition,
has no or noncontributory serologic or virologic testing, and
is not epidemiologically linked to a probable or confirmed case
Confirmed: a case that is laboratory confirmed
or that meets the clinical case definition and is epidemiologically
linked to a confirmed or probable case. A laboratory-confirmed
case does not need to meet the clinical case definition.
Comment
Two probable cases that are epidemiologically linked
would be considered confirmed, even in the absence of laboratory
confirmation. Only confirmed cases should be reported to the
NNDSS.
See also:
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