What is the HSV-1 IgG Test?

The Herpes Simplex Virus-1 (HSV-1) IgG Test detects antibodies produced by the body in response to HSV-1 infection. HSV-1 causes  oral herpes (commonly known as cold sores) but can also cause genital herpes, especially through oral-genital contact.

The test indicates present or past exposure to the Herpes Simplex virus.

Reasons for doing HSV-1 IgG Test

This test is recommended for individuals who:

• Present with cold sores, mouth ulcers, or blisters on the lips or face.
• Experience genital sores, especially following oral sex.
• Have a partner diagnosed with HSV-1 or who displays symptoms.
• Are pregnant or planning pregnancy, due to the risk of neonatal herpes.
• Experience unexplained genital symptoms or recurrent ulcers.

How to prepare for HSV-1 IgG Test

• No fasting is required for the antibody (blood) test.
• For swab-based testing, do not apply antiviral creams or ointments for at least 24 hours before specimen collection.
• Inform the healthcare provider if you are on antiviral medication, as it may impact test results.

Reference Values

• Negative: No HSV-1 antibodies detected; however, early testing post-exposure may result in false negatives.
• IgG Positive: Indicates past exposure to HSV-1; the virus may be dormant but present in the body.

Interpretation of Results

• Negative: No detectable antibodies or viral material. May require retesting if done too early after exposure.
• IgG Positive: Confirms previous infection; person is likely a carrier even without symptoms.
• Antibody testing cannot determine the exact timing of infection and should be interpreted alongside clinical presentation.

Waiting time for HSV-1 IgG Results

• The HSV-1 IgG antibody test results are available in 24 hours.  The result will be shared to you confidentially via email.

How to get the  Herpes Simplex Virus-1(HSV-1) IgG Test in Kenya

Please click the ‘Order Test’ button and put the Herpes Simplex Virus-1 (HSV-1) Test in your cart. You can then schedule a blood draw at our lab in Hurlingam or any of our partner locations if outside of Nairobi.
After the  analysis is complete, results will be shared with you on your email address provided during registration.