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Human Herpesvirus 7 Immunoglobulin G (IgG) Antibody Test

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

This test measures your body’s immune response to Human Herpesvirus 7 (HHV-7), a virus related to other herpesviruses. It detects antibodies produced by your immune system in response to past or current infection.

Quick summary

["This test helps assess whether you’ve been exposed to HHV-7, though it’s not commonly used for routine diagnosis."]

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

Key facts at a glance

LOINC
41842-6
Short code
HHV7 IgG+IgM Pnl Titr Ser IF
Synonyms
HHV7 IgG+IgM Pnl Titr Ser 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
CPT
82784
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 looks for IgG antibodies, which are part of your immune system’s long-term defense. These antibodies develop after your body has encountered HHV-7, either through infection or vaccination (if applicable). The presence of these antibodies suggests you’ve had exposure to the virus at some point.

Why Might You Need This Test?

This test may be ordered if you have symptoms or conditions associated with HHV-7, such as certain immune-related illnesses, or if you’re being evaluated for a suspected herpesvirus infection. It’s less commonly used than tests for other herpesviruses like HHV-6 or CMV.

How Is This Test Performed?

A blood sample is collected from a vein in your arm. The sample is then sent to a lab for analysis using an immunoassay method, which detects the presence of IgG antibodies specific to HHV-7.

What Do the Results Mean?

A positive result indicates the presence of IgG antibodies, meaning you’ve likely been exposed to HHV-7. A negative result suggests no detectable antibodies at the time of testing. Interpretation depends on clinical context and may require correlation with symptoms or other tests.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

IgG Antibody to HHV-7

Frequently asked questions

What Are the Possible Causes of Positive or Negative Results?
Positive results for IgG antibodies to HHV-7 can occur after past infection, but they don’t always indicate an active infection. HHV-7 is often latent (inactive) in the body and may reactivate under certain conditions, such as immune suppression. This test alone cannot confirm an active infection and should be used alongside clinical judgment and other diagnostic criteria.
How Long Does It Take to Get Results?
Results from this test are typically available within 1 to 3 business days, depending on lab processing times. Your healthcare provider will discuss the results with you during your follow-up visit.
Are There Any Risks or Side Effects?
There are generally no significant risks associated with a blood draw. Some people may experience mild discomfort or bruising at the injection site, but these are usually temporary.
  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