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

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

This test measures the level of antibodies against herpes simplex virus type 1 (HSV-1) in your blood. These antibodies help your immune system recognize and fight the virus if it enters your body again.

Quick summary

["This test helps assess your immune response to HSV-1, which can indicate past infection or immunity."]

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

Key facts at a glance

LOINC
33294-0
Short code
HSV1+2 IgM CSF Ql IF
Synonyms
HSV1+2 IgM CSF Ql IF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms of herpes (e.g., sores, pain, or flu-like symptoms), a history of HSV-1 exposure, or if you’re being evaluated for immune function. It can also be used to confirm past infection or monitor immune response in certain conditions.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The process is quick and typically painless.

What the Test Results Mean

Positive results indicate the presence of HSV-1 antibodies, suggesting you’ve likely had the virus at some point. The exact meaning depends on your medical history and symptoms. Your provider will interpret results in context.

Common Causes of Abnormal Results

High antibody levels are expected if you’ve had HSV-1 infection before. Low or absent levels may indicate no prior exposure or an immune system that doesn’t produce detectable antibodies.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgG Antibody to HSV-1

Frequently asked questions

What does a positive result mean for my health?
A positive result means your body has developed antibodies to HSV-1, indicating past exposure. This does not mean you’re currently infected; it simply shows your immune system has recognized the virus. Active infection would require different testing.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will contact you with the final report.
Can I get HSV-1 from this test?
No, the test only measures antibodies and does not involve the live virus. Blood samples are handled safely to prevent 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