Updated March 2017


Mumps is a viral infection of the salivary glands. It is also referred to as infectious parotitis.

Signs and Symptoms

Mumps symptoms begin 12 to 25 days after exposure. Common symptoms include swelling and pain in one or more salivary glands (sides of the cheeks and jaw), fever, headache, muscle aches and pains, fatigue and loss of appetite. One out of three people who are infected with mumps have symptoms of a cold but no salivary gland swelling. Less common symptoms may include swollen and tender testicles in males. These symptoms can last up to 10 days.


Mumps is caused by a ribonucleic (RNA) virus of the genus Rubulavirus in the Paramyxoviridae family.


Mumps is diagnosed with a blood test, a urine test, and a swab from the throat or salivary gland.

Complications (That May Arise)

Complications of mumps infection include encephalitis (infection in the brain), meningitis (infection in the lining of the brain), painful swelling of the testicles (orchitis) or the ovaries (oophoritis), pancreatitis (inflammation of the pancreas) or deafness. Pregnant women who become infected with mumps during the first three months of pregnancy are at risk of miscarriage.

Risk Factors

Mumps infection is rare in Toronto, with an average of five cases reported per year from 1997 to 2009. When it does occur it usually infects infants, school-aged children and young adults. There have been a number of recent outbreaks of mumps in Canada primarily among young adults between 20 and 30 years of age. Most adults born before 1970 have been infected with mumps and are probably immune.


There is no treatment for mumps. A virus causes mumps; therefore antibiotics will not treat this infection. Some medications can be given to relieve some of the symptoms.


Two different vaccines can prevent mumps. They are measles, mumps and rubella (MMR) and measles, mumps, rubella and chickenpox – also known as varicella (MMRV) vaccines. MMR vaccine is routinely given to children at 12 months of age. MMRV is routinely given before school entry (four to six years of age). Two doses of vaccine normally provide life-long immunity.

Those born between 1970 and 1992 in Ontario may have only received one dose of mumps-containing vaccine. If you are in this age group, get a second mumps vaccination (given as MMR) if you have not had one, especially if you are a post-secondary student or healthcare worker. Those born before 1970 are assumed to be immune to mumps through natural infection.

If you are unsure of your vaccination status, contact your health care provider or if you attended school in Toronto, call the Toronto Public Health Immunization Information Line at 416-392-1250.


Call your doctor if you have symptoms of mumps infection, or if you have been in contact with someone who has mumps. Tell your doctor that you think you have mumps before going to the doctor’s office. This will allow the doctor to prepare for your visit and protect other patients.

Persons diagnosed with mumps or suspected of having mumps should not attend daycare, school or work, should not participate in group activities and should refrain from having visitors for five days following the start of salivary gland swelling or until a diagnosis of mumps is ruled out by laboratory testing. They should also avoid sharing food, drinks, cigarettes, water bottles, or kissing others.


The mumps virus is found most often in saliva and respiratory droplets. It is spread from person to person through coughing, sneezing or even talking or coming into contact with a person’s saliva by sharing drinks, food or water bottles or by kissing.

What to Do If You Have Been in Contact with Someone Who Has Mumps

Do not share saliva with others through activities such as kissing or sharing food, drinks, cigarettes, water bottles or musical instruments. Cover your mouth when you cough and sneeze into your sleeve. See your doctor if you start to develop symptoms of mumps.

Getting the mumps vaccine after being exposed to the virus will not prevent infection. However, if you don’t become infected, the vaccine will provide protection against future exposures.

More Information

Call Toronto Public Health at 416-338-7600 (TTY at 416-392-0658) or speak to your health care provider.