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Anti-Hepatitis E Virus IgG Immunoassay (Serum/Plasma)

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

This test measures the presence of antibodies to Hepatitis E Virus (HEV) in your blood. Antibodies indicate your immune system has recognized and fought off the virus, often after an infection.

Quick summary

["HEV IgG helps determine past exposure to Hepatitis E, which can occur through contaminated food/water or rare blood transmission."]

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

Key facts at a glance

LOINC
22300-8
Short code
EHV1 Ab Titr Ser
Synonyms
EHV1 Ab Titr Ser
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 Hepatitis E Virus. These antibodies develop after your body has encountered the virus, usually within weeks to months after infection. Unlike IgM (which appears earlier), IgG persists longer and confirms past infection rather than an active one.

Why Might You Need This Test?

Doctors may order this test if you’ve had symptoms of hepatitis (e.g., jaundice, fatigue, abdominal pain) or if you’ve traveled to regions with high HEV prevalence. It’s also used in research or for monitoring immune response in certain conditions.

What Does a Positive Result Mean?

A positive result means your immune system has likely encountered HEV before, but it does not prove you have an active infection. This test alone cannot diagnose current hepatitis; other tests (like viral RNA detection) may be needed for that.

What Does a Negative Result Mean?

A negative result suggests you either haven’t been exposed to HEV or your body hasn’t yet produced detectable antibodies. It doesn’t guarantee you’re immune, as some people may not develop antibodies after infection.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

While primarily used to assess past HEV exposure, this test can support epidemiological studies, evaluate immune responses in HEV vaccine research, or help identify indirect exposure risks in high-risk populations (e.g., travelers, healthcare workers). It’s not a screening tool for active liver disease.

Short name

HEV IgG Antibody (Serum/Plasma)

Frequently asked questions

How is this test different from an IgM test?
IgG tests detect long-term immunity (weeks to years after infection), while IgM tests identify recent infection (days to months). HEV IgG alone cannot distinguish between natural infection and vaccination—both can produce IgG antibodies.
What if I have symptoms of hepatitis?
If you experience jaundice, dark urine, fatigue, or abdominal pain, seek medical attention immediately. A positive HEV IgG result alone won’t diagnose current hepatitis; your doctor may order additional tests (e.g., liver enzymes, viral RNA) to evaluate active infection.
Can this test be used for travel planning?
No. This test confirms past exposure but doesn’t indicate immunity. HEV risk is assessed through vaccination, hygiene practices, or avoiding contaminated water/food in high-risk areas. Always consult your doctor or travel clinic for personalized advice.
  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