Herpes Simplex Virus Type 1 IgG Antibody, Serology (Quantitative)

Why This Test Might Be Ordered

Your healthcare provider may order this test if you have symptoms like cold sores, genital sores, or neurological issues (such as meningitis) that could be caused by HSV-1. It may also be used for screening in certain populations or to monitor immune response in individuals with weakened immunity.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. It usually takes a few minutes, and you may feel a slight pinch. If you’re pregnant, breastfeeding, or have a bleeding disorder, let your provider know before the test.

What the Test Results Mean

A positive result means your body has produced antibodies against HSV-1, indicating past exposure. A negative result suggests you either haven’t been exposed or your immune system hasn’t yet produced detectable antibodies. Results don’t confirm active infection but can help guide treatment or further testing.

Common Causes of Abnormal Results

A positive result is normal if you’ve had HSV-1 in the past, as the virus can remain dormant. However, if you have symptoms or a recent exposure, additional testing may be needed to check for active infection. False negatives can occur if testing is done too early after exposure.