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Mumps Antibody, IgG (Serum/Plasma) - Immunoassay

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of Immunoglobulin G (IgG) antibodies against the mumps virus in your blood. IgG antibodies develop after you’ve been exposed to the virus or vaccinated.

Quick summary

["IgG antibodies help your immune system recognize and fight mumps infection if you’re exposed later."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
41178-5
Short code
Wheal 2D p Mumps Diam
Synonyms
Wheal 2D p Mumps Diam
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Does This Test Measure?

The test detects IgG antibodies specific to the mumps virus. These antibodies are part of your immune response and can indicate past infection or vaccination. IgG antibodies typically appear several weeks after exposure or vaccination and remain in your system for long-term protection.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms of mumps (e.g., swollen salivary glands, fever, fatigue) or if you’ve been exposed to someone with mumps. It can also help determine if you’ve had prior exposure or vaccination to prevent future infection.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein to draw a blood sample. The process usually takes a few minutes, and you may feel slight discomfort.

What to Expect After the Test

After the blood is drawn, you may experience mild bruising, soreness, or swelling at the site. Apply gentle pressure to the area to help stop any bleeding. Avoid vigorous activity for a short time. Most people return to normal activities immediately.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Mumps IgG

Frequently asked questions

What does a positive IgG result mean?
A positive IgG result means your body has produced antibodies against mumps, which could mean you’ve had the virus or been vaccinated. This does not indicate whether you’re currently infected.
Can this test detect active mumps infection?
No, this test only measures IgG antibodies, which appear after infection or vaccination. For active infection, your healthcare provider may also check for IgM antibodies or other symptoms.
How long do IgG antibodies last after mumps?
IgG antibodies can remain in your system for years, providing long-term immunity. However, their levels may gradually decrease over time, so occasional testing may be needed to confirm immunity in certain situations.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy