What is a case definition for mumps?
The following case definition for mumps was approved by the Council of State and Territorial Epidemiologists (CSTE) in 1999. Clinical case definition An illness with acute onset of unilateral or bilateral tender, self-limited swelling of the parotid or other salivary gland, lasting 2 or more days, and without other apparent cause. Laboratory criteria for diagnosis • Positive serologic test for mumps immunoglobulin M (IgM) antibody, or • A four-fold rise between acute- and convalescent -phase titers in serum mumps immunoglobulin G (IgG) antibody level by any standard serologic assay, or • Isolation of mumps virus from clinical specimen, or • Detection of mumps viral RNA by reverse transcription polymerase chain reaction (RTPCR) Case classification 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 or probable case. Confirmed: A case that is laboratory confirmed or that me
