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Herpes Simplex Virus Type 1 Antibody, Total (Serum/Plasma)

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

This test measures the presence of antibodies against Herpes Simplex Virus Type 1 (HSV-1) in your blood. Antibodies are proteins your immune system makes in response to infection.

Quick summary

["This test helps determine if your body has ever been exposed to HSV-1, even if you don’t currently have symptoms."]

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

Key facts at a glance

LOINC
41033-2
Short code
HSV1 Ab CSF IF-aCnc
Synonyms
HSV1 Ab CSF IF-aCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What Does This Test Measure?

The test detects total antibodies (both IgG and IgM) to HSV-1. These antibodies indicate past exposure to the virus, which can cause cold sores or genital herpes. It does not distinguish between active infection and past infection.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like cold sores, recurrent mouth sores, or if you’ve been exposed to someone with HSV-1. It can also be used in research or for monitoring immune response.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re on blood-thinning medication, let your provider know before the test.

What to Expect After the Test

You may experience mild discomfort or bruising at the injection site. Avoid heavy lifting or strenuous activity for a few hours afterward. Results are typically available within a few days.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Positive results confirm past exposure to HSV-1, meaning your immune system has likely cleared the virus. However, the virus can remain dormant in nerve cells and may reactivate later. This test does not indicate current infection status or severity.

Short name

Total HSV-1 Antibody

Frequently asked questions

Will this test show if I have an active HSV-1 infection?
No, this test measures antibodies from past exposure. For an active infection, your provider may recommend a different test or viral culture.
Can I get this test if I’ve never had cold sores?
Yes, if you’ve been exposed to HSV-1 (even without symptoms), you may develop antibodies. This test helps determine immunity status.
What does it mean if my test is negative?
A negative result suggests you’ve likely never been exposed to HSV-1, but it’s possible the test was taken too early after exposure. Follow-up testing may be needed if you suspect exposure.
  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