Skip to content

Herpes Simplex Virus Type 1 Antibody Detection (Qualitative) – Serum/Plasma

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

This test checks for the presence of antibodies against herpes simplex virus type 1 (HSV-1), a common virus that can cause cold sores and other infections.

Quick summary

["This screening helps determine if your immune system has ever been exposed to HSV-1."]

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

Key facts at a glance

LOINC
109803-7
Short code
HSV1+2 Ab Msmt CSF
Synonyms
HSV1+2 Ab Msmt CSF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

Doctors may order this test if you have symptoms like cold sores, recurrent mouth ulcers, or if you’ve been exposed to someone with HSV-1. It can also be part of a general health evaluation or for monitoring 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 your arm. The sample is sent to a lab for testing.

What the Test Results Mean

A positive result means your body has produced antibodies against HSV-1, indicating past or current infection. A negative result suggests no detectable antibodies, meaning either you’ve never been infected or the test was taken too early after exposure.

Common Reasons for Testing

This test is often used to diagnose HSV-1 infection when symptoms are unclear, to confirm exposure history, or to assess immune function in certain medical conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HSV-1 Antibody Screen

Frequently asked questions

This test is primarily qualitative and used for screening rather than diagnosing active infection. It helps guide further evaluation if needed, such as viral load testing or clinical correlation with symptoms.
A positive antibody result does not indicate the severity or current activity of the infection. If you have symptoms, your doctor may recommend additional testing.
A negative result does not rule out HSV-1 infection if the test was taken too early after exposure. Retesting may be needed if symptoms persist.
This test does not differentiate between HSV-1 and HSV-2 antibodies. If HSV-2 is suspected, a separate HSV-2 antibody test may be needed.
How long do HSV-1 antibodies stay in the blood?
Herpes simplex virus antibodies can remain detectable in the blood for years after infection, sometimes indefinitely, as the immune system keeps some memory of the virus.
  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