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Herpes Simplex Virus Type 1 Immunoglobulin G Antibody Measurement by Serological Test

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

This test checks for antibodies to the herpes simplex virus type 1 (HSV-1), which can indicate past infection with this virus.

Quick summary

["Past exposure to HSV-1 may be detected through antibody testing, not current infection."]

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

Key facts at a glance

LOINC
110920-6
Short code
HSV1 IgG Msmt CSF
Synonyms
HSV1 IgG Msmt CSF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What This Test Measures

Herpes simplex virus type 1 (HSV-1) is a common virus that can cause cold sores and other infections. This test detects antibodies (IgG) produced by your immune system in response to past exposure to HSV-1. Unlike active infection tests, this does not show whether you currently have the virus.

How the Test Works

Your blood sample is analyzed to identify specific antibodies against HSV-1. These antibodies are a sign your body has recognized and fought the virus in the past, often years ago.

Why It Might Be Ordered

A doctor may order this test if you have symptoms of HSV-1 infection, a history of cold sores, or if you’re being evaluated for conditions linked to past viral exposure.

What to Expect Before the Test

No special preparation is needed. You’ll have a small blood sample drawn, typically from your arm. This is a standard procedure and may cause a slight pinch.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Positive results indicate past exposure to HSV-1, which is common among adults. This does not confirm active infection but may help guide treatment or further evaluation for related health concerns.

Short name

HSV-1 IgG Antibody

Frequently asked questions

What does a positive result mean?
A positive result means your immune system has likely encountered HSV-1 before, though you may not currently have symptoms. It does not indicate whether you have active infection at this time.
Does this test show if I have active herpes?
No, this test only detects antibodies from past exposure. For active infection, a different test would be needed.
How long does it take to get results?
Results are usually available within 1–3 business days, depending on lab processing times.
  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