a generalized rash lasting greater than or equal to 3 days
a temperature greater than or equal to 101.0°F (greater
than or equal to 38.3°C)
cough, coryza, or conjunctivitis
Laboratory criteria for diagnosis
Positive serologic test for measles immunoglobulin M antibody,
or
Significant rise in measles antibody level by any standard
serologic assay, or
Isolation of measles virus from a clinical specimen
Case classification
Suspected: any febrile illness
accompanied by rash
Probable: a case that meets the clinical case definition,
has noncontributory or no serologic or virologic testing, and is not epidemiologically
linked to a confirmed case
Confirmed: a case that is laboratory confirmed or that
meets the clinical case definition and is epidemiologically linked to a confirmed
case. A laboratory-confirmed case does not need to meet the clinical case definition.
Comment
Confirmed cases should be reported to NNDSS. An imported
case has its source outside the country or state. Rash onset occurs within 18
days after entering the jurisdiction, and illness cannot be linked to local
transmission. Imported cases should be classified as:
International. A case that is imported from another
country
Out-of-State. A case that is imported from another
state in the United States. The possibility that a patient was exposed within
his or her state of residence should be excluded; therefore, the patient either
must have been out of state continuously for the entire period of possible
exposure (at least 7-18 days before onset of rash) or have had one of the
following types of exposure while out of state: a) face-to-face contact with
a person who had either a probable or confirmed case or b) attendance in the
same institution as a person who had a case of measles (e.g., in a school,
classroom, or day care center).
An indigenous case is defined as a case of measles that
is not imported. Cases that are linked to imported cases should be classified
as indigenous if the exposure to the imported case occurred in the reporting
state. Any case that cannot be proved to be imported should be classified as
indigenous.