Test library
Herpes 1 Blood Test
The HSV-1 test uses a blood sample to detect type-specific IgG antibodies against herpes simplex virus type 1, the virus most often linked to oral herpes. It can show prior exposure even without symptoms.
Order Herpes 1 (HSV-1) Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Herpes 1 (HSV-1) Test- Typical turnaround
- 1-3 business days
- Starting price
- From $45
- Results
- Confidential, online
Quick answer
The Herpes 1 test looks for IgG antibodies against herpes simplex virus type 1 in a blood sample. HSV-1 most often causes oral cold sores but can also cause genital infection. Because many people carry the virus without symptoms, a blood test can reveal exposure that a visual exam would miss.
What this test measures
HSV-1 is one of two herpes simplex viruses. It spreads mainly through oral contact and commonly produces cold sores around the mouth, though it can infect the genital area as well. Once a person is infected, the virus stays in the body and antibodies remain detectable, which is what the test measures.
The assay detects type-specific IgG antibodies against HSV-1, distinguishing it from HSV-2. A blood sample is collected from a vein. Antibodies take several weeks to develop after exposure, so timing affects the result. The test does not require an active sore and is useful when someone wants to know their exposure status.
A positive result means the person has been exposed to HSV-1. It does not indicate when infection occurred or how frequently symptoms will appear. Many carriers never have noticeable outbreaks. A healthcare provider interprets the result with the person's history and can answer questions about transmission.
- HSV-1 type-specific IgG antibodies
- HSV-1 index value (HerpeSelect)
- HSV-1 antibody level
- HSV-2 type-specific IgG when ordered together
- HSV-1 and HSV-2 differentiation ratio
- Total HSV IgG when included
Why people order this test
- Check whether a person has been exposed to HSV-1
- Evaluate oral sores when the cause is unclear
- Test for herpes when no active lesion is available
- Distinguish HSV-1 from HSV-2 exposure
- Screen as part of a sexual health workup
- Follow up after a possible exposure
How to prepare
No fasting is needed. A blood sample is collected from a vein, usually at the arm. Ask the laboratory about the best timing after a possible exposure, since antibodies take time to develop.
Understanding your results
Results are typically reported within one to three business days. The report gives an index value and a positive or negative interpretation for HSV-1. A healthcare provider can explain what a low-positive or borderline result means.
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Frequently Asked Questions
What does the HSV-1 test detect?
It detects type-specific IgG antibodies against herpes simplex virus type 1, which indicates prior exposure to that virus.
Does HSV-1 only cause oral herpes?
No. HSV-1 most often causes oral cold sores, but it can also cause genital infection through oral contact.
Can I have HSV-1 without symptoms?
Yes. Many people carry HSV-1 and never develop noticeable cold sores or other symptoms.
Is fasting required?
No. This test uses a blood sample, and fasting is not required unless it is bundled with another test that calls for it.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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