Herpes Simplex Virus Antibody, IgG and IgA (Serum/Plasma)

What This Test Measures

The test detects two types of antibodies—IgG and IgA—that your immune system produces in response to HSV infection. IgG antibodies typically appear after initial infection and persist long-term, while IgA antibodies may appear earlier or in active infection phases. These antibodies help your body fight the virus but don’t directly indicate active disease.

Why It Matters for Your Health

Having HSV antibodies can confirm past infection, even if you don’t currently have symptoms. This is important for understanding your risk of transmission, managing chronic conditions like herpes, or assessing exposure in medical or occupational settings.

How the Test Works

Blood is drawn and tested using immunoassay methods to detect specific antibodies against HSV proteins. The test doesn’t measure the virus itself but relies on your immune system’s response to identify exposure.

When You Might Need This Test

Your healthcare provider may recommend this test if you have symptoms of herpes (e.g., sores, pain, or flu-like illness), if you’re at risk for HSV infection (e.g., sexually active without protection, immunocompromised), or if you’re being evaluated for recurrent outbreaks.