Paeds · infectious-diseases
Mumps
Also known as Mumps virus infection · Infectious parotitis · Epidemic parotitis · Mumps orchitis · Mumps meningitis
Fellowship topic on mumps in children: the mumps virus (a paramyxovirus) and its tropism for glandular and neural tissue that produces the hallmark parotitis and the complications — orchitis, meningitis, encephalitis, pancreatitis and deafness; the 12–25-day incubation and infectious window; the differential of parotid swelling and of acute scrotum; buccal-swab RT-PCR and IgM serology interpreted by timing and vaccination status; supportive management, isolation and notification; the 5-day exclusion rule; the two-dose MMR schedule and the waning-immunity resurgence problem; the third-dose outbreak-control strategy; special populations (postpubertal adolescents, pregnant women, immunocompromised, under-vaccinated communities, Indigenous and migrant families); and ANZ/UK/US/Canada guidance.
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Target exams
Red flags
- Meningism, severe headache, photophobia or altered consciousness with mumps — aseptic meningitis is common; encephalitis is rare but life-threatening and mandates urgent assessment
- Severe scrotal pain and swelling in a postpubertal male with mumps — orchitis in up to a third of postpubertal males; differentiate urgently from testicular torsion
- Severe abdominal or back pain with vomiting — suggests pancreatitis; check amylase/lipase and exclude surgical causes
- Sudden unilateral hearing loss during mumps — sensorineural deafness, usually permanent; needs urgent audiology and ENT
- A partially or unvaccinated child with parotitis — confirm with PCR and notify; isolate for five days to protect susceptible contacts
Life stages
Care settings
Clinical exam formats
Board mappings
- General Paediatrics and Infectious Diseases: mumps — clinical course, parotitis, complications and diagnosis
- Immunisation: the two-dose MMR schedule and outbreak-control third dose
- Renewed curriculum — Infectious diseases (LG): mumps recognition, complications, laboratory diagnosis and public-health management
- Community and population child health: MMR coverage, waning-immunity resurgence and outbreak response
- General Paediatrics: mumps — diagnosis and management of parotitis and of mumps meningitis or orchitis
- Public health: notification, isolation, the five-day exclusion rule and contact tracing
- Long Case / Structured discussion: the child with parotitis — differential, diagnosis, complications and prevention
- Communication station: explaining mumps, isolation and the MMR strategy to a family
- Level 2 / 3 — Infection: mumps as a vaccine-preventable paramyxovirus infection; diagnosis, complications and public-health responsibilities
- Public health and immunisation: the MMR programme, outbreak control and notification
- Foundation of Practice (FOP): mumps clinical course, parotitis and complications
- Applied Knowledge in Practice (AKP): diagnosis, supportive management, isolation and immunisation strategy
- History-taking and management: the child with parotid swelling or acute scrotal pain in mumps
- Communication: explaining mumps, isolation and vaccination to a family
- General Pediatrics Content Outline — mumps: diagnosis, complications and prevention
- Infectious Diseases: mumps virus, RT-PCR/serology diagnosis and outbreak control
- Bright Futures / immunisation: MMR two-dose schedule and third-dose outbreak strategy
- Patient Care: diagnosis and supportive, stepwise management of mumps and its complications
- Systems-Based Practice and Population Health: notification, isolation, contact tracing and the immunisation programme
- Medical Knowledge: mumps pathophysiology, complications and vaccine strategy
- Medical Expert: mumps diagnosis, complications and management
- Health Advocate and Collaborator: immunisation, notification and public-health coordination
- Communicator: explaining mumps, isolation and prevention to families
Two presentations of the same virus
Typical childhood case
Postpubertal / outbreak case
Parotitis is the sign, PCR is the test, supportive is the treatment, five days is the exclusion, MMR is the prevention. The trap: up to a third of mumps infections have no parotitis at all — a vaccinated young adult with meningitis or orchitis and a mumps outbreak contact is still mumps until proven otherwise. [5] [6]
Overview & Definition
Picture a sixteen-year-old boy brought to the emergency department with three days of fever and tender swelling at the angle of his jaw, now complaining of severe pain and swelling in his right testicle. He had two MMR doses as a child, but he has just started university where a mumps outbreak is circulating. The parotitis is unmistakable, but it is the orchitis — a complication that disproportionately affects postpubertal males — that brings him in, and that will frame the conversation about complications, transmission and prevention. Recognising that parotitis is only the visible tip of a multisystem virus is what turns a simple "swollen gland" encounter into a complete fellowship answer. [1] [6]
Mumps is an acute, contagious viral infection caused by the mumps virus, a single-stranded RNA paramyxovirus of the genus Rubulavirus, transmitted by respiratory droplets, direct contact with saliva, and contaminated fomites. In its classic form it produces acute non-suppurative enlargement of one or both parotid glands — infectious parotitis — but the virus is tropic for glandular epithelium and the central nervous system, so orchitis, oophoritis, pancreatitis, aseptic meningitis, encephalitis and sensorineural deafness are all part of the disease. There is a single serotype, and infection confers lifelong immunity in most cases. [5] [7]
The clinician's job has two halves. The acute half is to recognise parotitis and its complications, confirm the diagnosis where needed, provide supportive care, and prevent spread through isolation and notification. The preventive half is to deliver and reinforce the MMR programme — two doses in childhood, a catch-up for the under-immunised, and a third dose in outbreak settings — because the child who never develops mumps is child programme has protected. [1] [5]
References11ShowHide
- [1]Cardemil CV; Dahl RM; James L; Wannemuehler K; et al Effectiveness of a Third Dose of MMR Vaccine for Mumps Outbreak Control. N Engl J Med, 2017.PMID 28877026
- [2]Barskey AE; Schulte C; Rosen JB; Handschur EF; et al Mumps outbreak in Orthodox Jewish communities in the United States. N Engl J Med, 2012.PMID 23113481
- [3]Cortese MM; Barskey AE; Tegtmeier GE; Zhang C; et al Mumps antibody levels among students before a mumps outbreak: in search of a correlate of immunity. J Infect Dis, 2011.PMID 21933874
- [4]Kutty PK; Kyaw MH; Dayan GH; Brady MT; et al Guidance for isolation precautions for mumps in the United States: a review of the scientific basis for policy change. Clin Infect Dis, 2010.PMID 20455692
- [5]Di Pietrantonj C; Rivetti A; Marchione P; Debalini MG; et al Vaccines for measles, mumps, rubella, and varicella in children. Cochrane Database Syst Rev, 2021.PMID 34806766
- [6]Peltola H; Kulkarni PS; Kapre SV; Paunio M; et al Mumps outbreaks in Canada and the United States: time for new thinking on mumps vaccines. Clin Infect Dis, 2007.PMID 17638194
- [7]Rubin SA; Qi L; Audet SA; Sullivan B; et al Antibody induced by immunization with the Jeryl Lynn mumps vaccine strain effectively neutralizes a heterologous wild-type mumps virus associated with a large outbreak. J Infect Dis, 2008.PMID 18558869
- [8]Nunn A; Masud S; Krajden M; Naus M; et al Diagnostic Yield of Laboratory Methods and Value of Viral Genotyping during an Outbreak of Mumps in a Partially Vaccinated Population in British Columbia, Canada. J Clin Microbiol, 2018.PMID 29491021
- [9]Kutty PK; Kruszon-Moran DM; Dayan GH; Alexander JP; et al Seroprevalence of antibody to mumps virus in the US population, 1999-2004. J Infect Dis, 2010.PMID 20662720
- [10]Vygen S; Fischer A; Meurice L; Mounchetrou Njoya I; et al Waning immunity against mumps in vaccinated young adults, France 2013. Euro Surveill, 2016.PMID 26987576
- [11]Hatchette T; Davidson R; Clay S; Pettipas J; et al Laboratory diagnosis of mumps in a partially immunized population: The Nova Scotia experience. Can J Infect Dis Med Microbiol, 2009.PMID 21119794