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Herpes Simplex Virus 1 (HSV-1) Nucleic Acid Detection by Probe-Based Assay

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

This test checks for the presence of genetic material from the herpes simplex virus type 1 (HSV-1) in your body fluids, often used to diagnose infections or confirm exposure.

Quick summary

["This test helps determine if you have an active or past HSV-1 infection, which can guide treatment and management decisions."]

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

Key facts at a glance

LOINC
32141-4
Short code
HSV1+2 DNA CSF Ql NAA+probe
Synonyms
HSV1+2 DNA CSF Ql NAA+probe
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
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 sores, fever blisters, or recurrent cold sores, especially if they appear in unusual places. It can also be used to diagnose infections in newborns, confirm recurrent outbreaks, or assess exposure in certain high-risk situations.

What to Expect Before the Test

No special preparation is needed. Blood is typically drawn from a vein in your arm, or a sample may be collected from a lesion if available. If testing cerebrospinal fluid (CSF) is required, a spinal tap may be performed under sterile conditions.

What the Test Results Mean

A positive result indicates the presence of HSV-1 genetic material, suggesting an active infection or past exposure. A negative result means the virus was not detected in the sample tested at that time.

Common Uses and Limitations

This test is primarily used for diagnosing HSV-1 infections but may not detect latent (dormant) infections without symptoms. Results can vary based on the stage of infection and the type of sample collected.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HSV-1 DNA Test

Frequently asked questions

What does a positive result mean?
A positive result means the test detected genetic material from HSV-1, indicating an active infection or past exposure. This does not necessarily mean you are currently experiencing symptoms, but it confirms the virus is present in your body.
How can I reduce the risk of spreading HSV-1 if my test is positive?
If you test positive, practice good hygiene—such as avoiding sharing personal items—and avoid touching sores. If you have cold sores, avoid kissing or sexual contact until the sores heal. Follow your healthcare provider’s advice for managing outbreaks and treatment.
Can this test detect HSV-1 in asymptomatic individuals?
While this test can detect HSV-1 genetic material, it may not always identify latent infections without symptoms. If you are concerned about exposure or recurrent outbreaks, discuss further testing with your healthcare provider.
  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