Herpes Simplex Virus (HSV) Test: Purpose, Normal Range and Price

The Herpes Simplex Virus test is a blood test that detects antibodies against Herpes Simplex Virus, a highly prevalent viral infection that exists in two distinct types. HSV-1 primarily causes oral herpes, manifesting as cold sores and fever blisters around the mouth and lips, while HSV-2 is predominantly associated with genital herpes, a sexually transmitted infection characterised by recurrent painful genital ulcers. Both types establish lifelong latency in sensory nerve ganglia after initial infection and can reactivate periodically throughout a person's life, often triggered by stress, illness, immunosuppression, or hormonal changes. The serological HSV test measures IgG and IgM class antibodies in the blood. IgM antibodies appear within the first one to two weeks of a primary infection and indicate recent or active exposure, while IgG antibodies develop within two to three weeks and persist lifelong as markers of past infection and immune memory. This distinction is clinically important as it helps differentiate between a new primary infection and a longstanding latent infection that has reactivated. In India, HSV infections are widespread across all socioeconomic groups, with HSV-1 seroprevalence estimated above 60 percent in the adult population and HSV-2 increasingly recognised as a significant cause of genital ulcer disease. HSV testing is particularly important in pregnant women, as neonatal herpes transmitted during delivery is a serious and potentially life-threatening condition. The test is performed on a small blood sample drawn from a vein and completed in under five minutes.

Doctors prescribe a Herpes Simplex Virus test in the following situations: Diagnosing primary HSV infection in patients presenting with painful oral or genital ulcers, vesicular lesions, burning dysuria, and associated fever and lymphadenopathy where serological confirmation distinguishes HSV from other causes of ulcerative disease and directs appropriate antiviral therapy. Investigating recurrent genital ulcers and unexplained genital symptoms in sexually active individuals where type-specific HSV IgG testing identifies the causative virus type, informs counselling regarding transmission risk, and guides decisions about suppressive antiviral therapy to reduce recurrence frequency. Screening pregnant women for HSV infection where maternal primary infection in the third trimester carries the highest risk of neonatal herpes transmission during vaginal delivery, and early identification enables obstetric planning including consideration of caesarean delivery and prophylactic antiviral treatment. Evaluating immunocompromised patients including those with HIV, organ transplant recipients, and patients on chemotherapy where HSV reactivation causes severe, atypical, and potentially disseminated disease requiring early diagnosis and prompt antiviral intervention. Investigating HSV encephalitis in patients with acute neurological symptoms, fever, and altered consciousness where HSV is the most common cause of fatal sporadic viral encephalitis and rapid diagnosis is critical for initiating life-saving intravenous acyclovir therapy. Assessing partners of individuals with known HSV infection where type-specific serology identifies susceptible individuals, facilitates informed counselling about transmission risk reduction, and guides decisions regarding suppressive antiviral therapy in discordant couples.

The HSV test measures IgG and IgM antibodies against Herpes Simplex Virus in the blood, reported as reactive or non-reactive, with index values varying by laboratory platform. Type-specific assays report results separately for HSV-1 and HSV-2. Non-Reactive A non-reactive result for both IgG and IgM indicates no detectable antibodies against HSV at the time of testing, suggesting the individual has not been previously exposed to the virus. However, testing within the first two weeks of a primary infection may yield a false negative as antibodies have not yet developed, and repeat testing after two to four weeks is recommended if recent exposure is clinically suspected. IgM Reactive A reactive IgM result indicates recent or active HSV infection, consistent with a primary episode or reactivation in some cases. This finding warrants prompt clinical evaluation, initiation of antiviral therapy, and in pregnant women, immediate obstetric review to assess the risk of neonatal transmission and plan delivery management accordingly. IgG Reactive A reactive IgG result indicates past HSV infection with established immune memory, confirming that the individual has been exposed to the virus at some point. Isolated IgG positivity without IgM suggests latent infection rather than active disease, though clinical correlation with current symptoms remains important to determine whether antiviral treatment or suppressive therapy is clinically indicated.

No fasting is required for the HSV antibody test, as food and fluid intake do not affect antibody concentrations in the blood. The test can be performed at any time of day without any specific dietary preparation, making it straightforward to schedule as part of a broader sexual health or infectious disease screening panel. Inform your doctor about any antiviral medications currently being taken, including acyclovir, valacyclovir, or famciclovir, as active antiviral therapy can suppress viral replication and may influence the clinical interpretation of results, though it does not typically affect serological antibody levels directly. A complete medication history ensures your physician can contextualise results accurately. If you suspect a very recent exposure to HSV within the past two weeks, inform your healthcare provider before testing, as the antibody window period means IgM may not yet be detectable and IgG will be absent in a truly primary infection. Your doctor may recommend repeat testing after two to four weeks to confirm or exclude recent infection with greater serological reliability. Staying well hydrated before the blood draw facilitates easier venous access and a smooth sample collection experience.

If you are booking through the SecondMedic platform the Herpes Simplex Virus test price starts at approximately Rs. 341. The exact price will be confirmed at the time of booking through SecondMedic. If your doctor has prescribed multiple tests alongside the Herpes Simplex Virus test, SecondMedic health packages include HSV as part of a broader sexual health screening panel at a significantly lower combined price.

SecondMedic offers convenient home sample collection for the Herpes Simplex Virus test, making it easy to get tested without visiting a diagnostic centre. Home collection is available free of charge for orders above Rs. 300. A trained phlebotomist will visit your preferred address between 7 AM and 10 PM, seven days a week, including Sundays and public holidays. Your blood sample is processed at NABL-accredited partner laboratories, and your report is delivered within 24 hours directly to your WhatsApp and email.