Mumps

Epidemiology

Incubation period: 16–18 days
Prodrome
- Duration: 3–4 days
- Symptoms: low-grade fever , malaise, headache
Classic course: inflammation of the salivary glands, particularly parotitis
- May initially present with local tenderness, pain, and earache
- Unilateral swelling of the salivary gland (lateral cheek and jaw area); During the course of disease, both salivary glands are usually swollen.
- Redness in the area of the parotid duct
- Possible protruding ears

Definition: inflammation of the testis
Epidemiology: most common complication of mumps in postpubertal male individuals (20–30% in unvaccinated postpubertal and 6–7% in vaccinated males)
Clinical features
- Sudden onset of fever, nausea, vomiting
- Swollen and tender affected testicle(s); primarily unilateral, although bilateral in ∼ 15% of cases
Complications: may lead to atrophy and, in rare cases, hypofertility

Aseptic meningitis (1–10% of cases): predominantly mild course and usually no permanent sequelae
Acute pancreatitis (< 1% of cases)
- ↑ Lipase in addition to ↑ amylase
Hearing loss (extremely rare)