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Antibody to Parvovirus B19, IgG (Serum/Plasma)

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

This test measures the level of IgG antibodies in your blood to help detect past exposure to parvovirus B19, a virus that can cause severe anemia in pregnant women and affect fetal development.

Quick summary

["This test helps identify if you’ve had parvovirus B19 in the past."]

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

Key facts at a glance

LOINC
23475-7
Short code
T parva Ab Ser Ql IF
Synonyms
T parva Ab Ser Ql IF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
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

Why This Test Is Done

Doctors may order this test if you have symptoms like fatigue, joint pain, or rash that could be linked to parvovirus B19. It’s also used during pregnancy to check for exposure, especially if you’re at higher risk for complications.

What to Expect Before the Test

No special preparation is needed. You’ll likely have a simple blood draw from a vein in your arm. The test is usually done in a lab setting and results may take a few days to a week.

What the Results Mean

A positive result means you have detectable IgG antibodies, suggesting past infection. A negative result indicates no detectable antibodies, meaning you likely haven’t been exposed recently or at all. Results alone don’t confirm active infection.

Possible Complications

Rarely, blood draws can cause mild bruising, pain, or swelling at the site. If you’re pregnant, this test is generally safe but should be discussed with your healthcare provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgG Antibody to Parvovirus B19

Frequently asked questions

What does a positive result mean?
A positive result means your immune system has recognized parvovirus B19 before, likely from past exposure. This doesn’t indicate whether you’re currently infected, but it confirms your body has built immunity.
Can this test be used to diagnose active parvovirus infection?
No, this test only detects IgG antibodies, which develop after the acute infection has passed. For active infection, your doctor may use additional tests like PCR or viral antigen testing.
Is this test safe during pregnancy?
Yes, this blood test is generally safe during pregnancy. It helps monitor potential risks to the fetus if the mother becomes infected later. Always discuss any test with your healthcare provider before proceeding.
  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