The HSV-2 IgG Test detects IgG antibodies against the Herpes Simplex Virus Type 2 (HSV-2), the virus primarily responsible for genital herpes infections. This test helps determine if a person has been exposed to HSV-2 in the past and has developed a long-term immune response.
✅ Confirm Past or Chronic Infection – IgG antibodies indicate a previous HSV-2 infection, which remains lifelong.
✅ Differentiate Between HSV-1 and HSV-2 – Unlike IgM tests, which can cross-react, IgG is more specific for HSV-2.
✅ Screening for Asymptomatic Carriers – Many people with HSV-2 have no visible symptoms but can still transmit the virus.
✅ Pre-Conception & Pregnancy Screening – Important for pregnant women to assess the risk of neonatal herpes transmission.
🩸 Blood Sample Collection – A blood sample is drawn and analyzed using ELISA (enzyme-linked immunosorbent assay) or immunoassay techniques.
| Result | Interpretation |
|---|---|
| Positive | Prior exposure to HSV-2; individual has a lifelong infection and may experience outbreaks. |
| Negative | No evidence of past HSV-2 infection; if recent exposure is suspected, repeat testing in 6–12 weeks. |
📌 A positive IgG test does not indicate when the infection occurred—only that the person has been infected at some point.
| Test | Indicates | Time of Appearance | Usefulness |
|---|---|---|---|
| HSV-2 IgM | Recent or reactivated infection | 1–2 weeks after exposure | Can cross-react with HSV-1; less reliable for diagnosis |
| HSV-2 IgG | Past or chronic infection | 2–12 weeks after exposure; remains for life | Confirms long-term HSV-2 infection; more specific than IgM |
📌 IgG is the preferred test for diagnosing HSV-2 because it is more specific and reliable than IgM.
⚠ Primary Infection Symptoms:
🔹 Painful genital blisters or sores
🔹 Itching, burning sensation
🔹 Painful urination
🔹 Flu-like symptoms (fever, swollen lymph nodes, body aches)
⚠ Recurrent Infection Symptoms:
🔹 Milder and shorter outbreaks
🔹 Warning signs like tingling or burning before an outbreak
🔹 Asymptomatic shedding (virus spreads even without visible sores)
🔬 HSV-2 PCR Test – Detects HSV-2 DNA in a lesion sample or blood (most accurate for active infections).
🔬 Viral Culture – Identifies HSV-2 from an active sore (less sensitive than PCR).
🔬 Western Blot HSV Test – Highly specific for HSV-2, used when standard tests give unclear results.
✔ HSV-2 IgG confirms past exposure and is more reliable than IgM.
✔ A positive result means lifelong infection, but symptoms vary by person.
✔ Asymptomatic individuals can still transmit the virus.
✔ Antiviral medications (acyclovir, valacyclovir) help manage symptoms and reduce outbreaks.