Overview: Herpes Simplex Virus 2 IgG TestIntroduction: The Herpes Simplex Virus 2 IgG Test detects IgG antibodies to HSV-2 to confirm past genital herpes infection, causing genital sores. Aligned with 2023 IDSA guidelines, it uses an immunoassay for high sensitivity, aiding in infectious disease screening. This test is critical for guiding diagnosis, counseling, and improving outcomes in serology for patients with suspected HSV-2 infection, aiding in partner management and recurrence prevention.
Other Names: HSV 2 IgG Assay, Genital Herpes Immunity Test.
FDA Status: FDA-cleared diagnostic test, meeting serology standards for diagnostic accuracy.
Historical Milestone: HSV-2 antibody testing began in the 1980s with herpes research. IgG immunoassays improved in the 1990s, enhancing past infection detection.
Purpose: Confirms past HSV-2 infection, guides counseling, and monitors anti-HSV-2 IgG in patients with genital sores.
Test Parameters: 1. HSV 2 IgG
Pretest Condition: No fasting required. Collect serum, CSF, or saliva at any time. Report symptoms like genital sores, pain, or neurological symptoms, and list medications.
Specimen: 2-5 mL serum (SST), 1-2 mL CSF (sterile container), or 1-2 mL saliva (sterile container). Centrifuge serum or CSF within 1 hour. Transport in a biohazard bag within 8 hours.
Sample Stability at Room Temperature: 8 hours
Sample Stability at Refrigeration: 7 days
Sample Stability at Frozen: 6 months
Medical History: Document genital sores, pain, or history of HSV-2 exposure. Include current medications, especially antivirals, and recent infections.
Consent: Written consent required, detailing the tests purpose, diagnostic implications, and potential need for counseling or antiviral therapy.
Procedural Considerations: Uses an immunoassay to detect anti-HSV-2 IgG antibodies. Results are available in 1-2 days, enabling rapid clinical decisions. Performed in laboratories, often for partner counseling.
Factors Affecting Result Accuracy: Improper sample handling or cross-reactivity with HSV-1 can affect results. Early infection may yield false negatives.
Clinical Significance: Positive anti-HSV-2 IgG indicates past HSV-2 infection, guiding counseling and antiviral therapy. Negative results suggest no prior exposure or early infection.
Specialist Consultation: Consult an infectious disease specialist or gynecologist for result interpretation and management planning.
Additional Supporting Tests: HSV-2 IgM, HSV PCR, or viral culture to confirm active or recent HSV-2 infection.
Test Limitations: Cannot distinguish active from past infection. Cross-reactivity with HSV-1 may occur. Clinical correlation is needed.
References: IDSA Herpes Guidelines, 2023; Clinical Infectious Diseases, Corey L, 2022.
