Measles and mumps tests

Measles and mumps, two highly contagious viral infections, require accurate diagnosis to prevent their spread. This article explores the various tests available to detect these diseases, their usefulness in screening and immunity, and the procedures for getting tested, thus ensuring better public health.

What are the tests for measles and mumps?

Measles and mumps are infections caused by similar viruses. There are various types of tests for measles and mumps. These tests can:

  • Diagnosing an infection that you (or your child) have now or recently had
  • Show if you are immune (protected from infection) against measles and mumps because you have had a past vaccination or infection.

Both measles and mumps are highly contagious, which means they spread easily from person to person:

  • Measles causes symptoms similar to a bad cold or the flu. It also causes a flat, red rash. The rash usually starts on your face and spreads all over your body.
  • The mumps cause flu-like symptoms with painful swelling of the salivary glands, causing your cheeks and jaw to become swollen. In general, mumps is a less serious illness than measles.

Most healthy people with measles or mumps infections recover in about two weeks or less. But sometimes these infections cause serious complications, such as encephalitis (brain swelling). Measles can also cause pneumonia and serious problems during pregnancy.

In the United States, most people have been vaccinated against measles and mumps. As a result, measles has become a rare disease in this country. Most cases of measles come from unvaccinated people who have traveled to countries where measles is common and have returned home with the disease.

Epidemics of mumps are still happening in the United States, mostly in group living situations, such as in universities. Some people who have been vaccinated may still get mumps during an epidemic, but they will generally have mild symptoms.

Other names: measles immunity test, mumps immunity test, measles blood test, measles blood test, mumps virus culture, mumps virus culture, measles virus by RT-PCR, mumps virus by RT-PCR, mumps virus by RT-PCR, measles virus by RT-PCR, measles antibody IgM, IgG

What are tests for?

Measles and mumps tests can be used to:

  • Diagnosing an active measles or mumps infection. An active infection means that you have a virus that is developing in your body right now. Two types of tests are used to diagnose measles and mumps:
    • IgM antibody test. IgM antibodies are proteins that your immune system produces when the measles or mumps virus is in your body. The test looks for IgM antibodies in a sample of your blood.
    • Molecular tests. These tests look for the measles or mumps virus in a sample of your blood, fluid from your nose or throat, or urine. A PCR (polymerase chain reaction) test is a common type of molecular test.
  • Determine if you are immune to measles or mumps. If you have been vaccinated against measles and mumps or if you have been ill with either virus in the past, your body produces IgG antibodies to protect you against future infection, usually for the rest of your life. One IgG antibody test Check your blood for these antibodies.
  • Help find and control measles and mumps epidemics in the community. The tests help identify new, recent cases of measles and mumps so that public health officials can take action to help stop the spread of the disease.

An MMR antibody test is a unique blood test used to help diagnose both measles and mumps or to see if you are immune. MMR stands for measles, mumps, and rubella. Rubella, also known as German measles, is caused by a different type of virus.

Why do I need a measles or mumps test?

You may need a test to check your immunity against measles and mumps if you:

  • Are you pregnant or planning to become pregnant
  • Go to school or start a job that requires proof that you are immune
  • Are a health professional who may be exposed to people with measles or mumps

Your health care provider may order a measles or mumps test if you or your child have symptoms of measles or mumps.

Symptoms of measles include:

  • Rash that starts on the face and spreads to the torso and legs
  • High fever
  • Cough
  • Runny nose
  • Sore throat
  • Conjunctivitis (also called pink eye)
  • Small white spots in the mouth

Symptoms of mumps include:

  • Swollen and sore jaw and swollen cheeks
  • Headache
  • Ear pain
  • Fever
  • Muscle pain
  • Appetite loss
  • Pain when swallowing

What happens during measles and mumps tests?

There are various ways to test for measles and mumps. Antibody tests require a blood sample. Molecular tests often use a blood or fluid sample from your mouth, throat, or nose:

  • Blood test. During a blood test, a health professional will take a blood sample from a vein in your arm using a small needle. After the needle is inserted, a small amount of blood will be collected in a test tube or vial. You may feel a slight prick when the needle goes in or out. This usually takes less than five minutes.
  • Swab test. A health professional will use a special swab to take a sample from your nose, throat, or cheek.
  • Nasal aspiration or wash. A health professional will insert a saline solution (salt water) into your nose and remove the sample using gentle suction.

If your provider thinks you have measles or mumps, you may have more than one test. Additionally, if your provider thinks measles or mumps caused encephalitis or meningitis, you may need a lumbar puncture. For a lumbar puncture, your healthcare professional will insert a thin, hollow needle into your spine and remove a small amount of fluid for testing.

Do I need to do anything to prepare for these tests?

You do not need special preparations for measles tests or mumps tests.

Are there risks associated with these tests?

There is very little risk associated with measles or mumps tests.

  • A blood test may cause mild pain or bruising where the needle was inserted, but most symptoms go away quickly.
  • A swab test can cause a feeling of disgust or even a tickle when your throat or nose is swabbed.
  • A nasal aspirate or a wash can be uncomfortable. These effects are temporary.

What do the results mean?

Negative test results mean that no signs of measles or mumps were found in your sample. This usually means you don't have measles or mumps right now. If you have had a negative result on an antibody test, it also means that you are not immune to measles or mumps.

Positive test results mean different things depending on what test you took:

  • A positive result on a molecular test (PCR) means that the measles or mumps virus has been found in your blood, and that you currently have an infection.
  • A positive IgM antibody test result means that you currently have a measles or mumps infection or that you have had a recent infection.
  • A positive result on an IgG antibody test means that you are immune to measles or mumps because you have had a past vaccination or infection.

Talk to your provider if you have questions about test scores.

If you (or your child) have a measles or mumps infection, you should stay home for several days to recover and to make sure you don't spread the disease. Your supplier will let you know when it is acceptable to resume your regular activities.

Learn more about lab tests, reference ranges, and understanding results.

Is there anything else I need to know about measles and mumps tests?

Vaccination is the best protection against measles and mumps and their complications. The Centers for Disease Control and Prevention (CDC) recommends:

  • For children: Two doses of the MMR vaccine (measles, mumps and rubella) given:
    • Between 12 and 15 months.
    • Between 4 and 6 years old.
  • For adults who are not immunized against measles and mumps and who are not pregnant: At least one dose of the MMR vaccine. Some people may need two doses.

If you are not sure if you are immunized against measles and mumps, or if you have questions about vaccine safety, talk to your healthcare provider.

References

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