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How serious is mumps?
In children, mumps is usually a mild disease.
Adults may have more serious disease and more
complications.
What are possible complications from mumps?
Before a vaccine was available, mumps accounted for
about 10% of viral meningitis reported in the United
States. This complication is now rare. Up to10%
of postpubertal males experience orchitis (testicular
inflammation) as a complication of mumps. This
may involve pain, swelling, nausea, vomiting, and
fever, with tenderness of the area possibly lasting for
weeks. Approximately half of patients with orchitis
have some degree of testicular atrophy, but sterility
is rare.
Inflammation of the ovaries (oophoritis) and/or
breasts (mastitis) can occur in females who have
reached puberty. An increase in spontaneous abortion
(miscarriage) has been found among women who
developed mumps during the first trimester of preg-
nancy in some studies but not in others; however,
there is no evidence that mumps causes birth defects.
Deafness, in one or both ears, can occur in approxi-
mately one per 20,000 reported cases of mumps.
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