Herpes Simplex Virus Type 1 Antibody (IgG) Titration by Serologic Assay
This test measures the level of antibodies against herpes simplex virus type 1 (HSV-1) in your blood. Antibodies are proteins your immune system produces to help fight infections.
["This test helps determine if you’ve been exposed to HSV-1 and whether your immune response is active."]
Key facts at a glance
- LOINC
- 25837-6
- Short code
- HSV1 Ab Titr Ser IF
- Synonyms
- HSV1 Ab Titr Ser IF
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- if
- 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 recommend this test if you have symptoms or a history of cold sores (fever blisters), recurrent oral or genital sores, or if you’re investigating a possible HSV-1 infection. It may also be used to monitor immune response in certain conditions or after vaccination.
What to Expect Before the Test
No special preparation is needed. You’ll typically have a blood sample drawn from a vein in your arm. The process usually takes a few minutes. If you’re on blood-thinning medication, let your provider know before the test.
What the Test Results Mean
A positive result indicates the presence of HSV-1 antibodies, suggesting past exposure to the virus. The **titer** (the exact antibody level) can help determine the strength of your immune response. A high titer may indicate a recent or active infection, while a lower titer might suggest past exposure without current activity.
Common Uses and Limitations
This test is primarily used to diagnose or confirm HSV-1 infection based on antibody presence. It does not distinguish between active infection and past exposure. It’s also not used to diagnose acute HSV-1 infections, as antibodies may take weeks to develop after initial infection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
HSV-1 antibodies are useful for diagnosing past infections, assessing immune status, or evaluating the effectiveness of treatments in certain clinical scenarios. However, they cannot replace other diagnostic tests like viral culture or PCR for confirming active infection. High titers may correlate with a stronger immune response, but they don’t indicate immunity or protection from future infections.
Short name
HSV-1 Antibody Titer
Frequently asked questions
What does a positive result mean?
Can this test detect active herpes infection?
How long does it take to get results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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