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Herpes Simplex Virus Type 1 Antibody Titration (Serum)

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

This test measures the strength of your immune response to herpes simplex virus type 1 (HSV-1), a common virus that can cause cold sores or other infections. It helps determine if you have been exposed to HSV-1 and whether your body has developed antibodies to fight it.

Quick summary

["This test helps assess past exposure to HSV-1 and supports diagnosis or monitoring of related conditions."]

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

Key facts at a glance

LOINC
43031-4
Short code
HSV1 Ab Titr Ser
Synonyms
HSV1 Ab Titr Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider 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 may also be used to evaluate immune function or monitor conditions linked to viral infections.

What to Expect During the Test

A blood sample is drawn from a vein in your arm. You may feel a small pinch, but it usually takes only a few minutes. The sample is sent to a lab for analysis to measure your antibody levels against HSV-1.

How the Results Are Used

Results show the highest dilution of your serum that still reacts with HSV-1 antibodies. This helps determine if you’ve had past exposure and whether your immune system is active against the virus.

What the Results Mean

A positive result indicates antibodies are present, suggesting past exposure. The titer value (e.g., 1:16, 1:64) reflects the strength of your immune response, which can inform further evaluation if needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HSV-1 Antibody Titer

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 2–5 business days, depending on lab processing times. Your healthcare provider will contact you with the final report.
Can this test detect active HSV-1 infection?
No, this test measures antibodies, which indicate past exposure rather than an active infection. For diagnosing active HSV-1, other tests or symptoms would be evaluated.
What if my antibody levels are low?
Low antibody levels may suggest you’ve never been exposed to HSV-1 or your immune response has waned. Discuss this with your provider to explore further testing or prevention strategies.
  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