Herpes Simplex Virus I Igg

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The HSV-1 IgG test is a blood test that detects Immunoglobulin G (IgG) antibodies specific to Herpes Simplex Virus type 1 (HSV-1).
HSV-1 is most commonly associated with oral herpes, which typically causes cold sores or fever blisters around the mouth, but it can also cause genital infections.
• IgG antibodies usually appear a few weeks after initial infection and stay in the body for life, indicating past or long-term infection.
• The test does not detect recent or active infection—for that, IgM or PCR tests are preferred.

Description

Why It’s Done:

This test is commonly ordered to:
• Determine prior exposure to HSV-1, especially in asymptomatic individuals.
• Distinguish between HSV-1 and HSV-2 infections, which is important for diagnosis and management.
• Evaluate patients with a history of herpes-like symptoms, even if they are not currently experiencing an outbreak.
• Screen individuals during pregnancy, as herpes infections can pose a risk to newborns.
• Identify silent carriers of the virus to help prevent transmission.
A positive HSV-1 IgG result means a person has been infected at some point in the past, even if they never showed symptoms.

Preparation:

• No fasting or special preparation is required.
• A simple blood sample is drawn from a vein in your arm.
• Inform your doctor if you have:
o Any history of herpes symptoms (oral or genital).
o Recently had blisters, sores, or flu-like symptoms.
o Concerns about herpes transmission or sexual health.