Serum herpes simplex antibodies is a blood test that looks for antibodies to the herpes simplex virus (HSV), including HSV-1 and HSV-2. HSV-1 usually causes cold sores (oral herpes). HSV-2 causes genital herpes.
Herpes serology; HSV blood test
How the test is performed
A blood sample is needed. For information on how this is done, see: Venipuncture
The sample is taken to the laboratory and tested for the presence and amount of antibodies.
How to prepare for the test
No special preparation is needed for this test.
How the test will feel
When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.
Why the test is performed
The test is done to find out whether a person has ever been infected with oral or genital herpes. It looks for antibodies to herpes simplex virus 1 (HSV-1) and herpes simplex virus 2 (HSV-2). This test does not detect the virus itself.
A negative (normal) test usually means you have not been infected with HSV-1 or HSV-2.
If the infection occurred very recently (within a few weeks to 3 months), the test may be negative, but you may still be infected. This is called a false negative.
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your doctor about the meaning of your specific test results.
What abnormal results mean
A positive test means you have been infected with HSV recently or at some point in the past.
Tests can be done to help determine if you have a recent infection.
Approximately 70% of adults have been infected by HSV-1 and have antibodies against the virus. About 20% of adults will have antibodies against the HSV-2 virus, which causes genital herpes.
HSV stays in your system once you have been infected. It may be "asleep" (dormant), and cause no symptoms, or may flare up and cause symptoms. This test cannot tell whether you are having a flare-up.
What the risks are
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight but may include:
Fainting or feeling light-headed
Hematoma (blood accumulating under the skin)
Infection (a slight risk any time the skin is broken)
While HSV-1 and HSV-2 are usually only active from time to time, once they are in your system, the virus stays in your body for the rest of your life.
Ask your health care provider what steps you need to take if you develop symptoms. Ask how to decrease your risk of spreading the virus to other people.
For sexually transmitted herpes, abstaining from sexualactivity is the only absolute way to prevent a sexually transmitted infection. Safer sex behaviors may reduce the risk.
The proper use of condoms, either the male or female type, greatly decreases the risk of catching a sexually transmitted infection. You need to wear the condom from the beginning to the end of each sexual activity.
Workowski KA, Berman S; Centers for Disease Control and Prevention (CDC). Sexually transmitted diseases treatment guidelines, 2010. MMWR Recomm Rep. 2010 Dec 17;59(RR-12):1-110.
Schiffer JT, Corey L. Herpes simplex virus. In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2009:chap 136.
Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington. Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.