Herpes Simplex Virus (HSV) 1 IgM Serum Test
Short Name: HSV-1 IgM
Also known as: HSV-1 IgM Antibody Test, Herpes 1 IgM Serum Test, HSV Type 1 IgM Test, Herpes Simplex Virus Type 1 IgM Antibody Test
Herpes Simplex Virus (HSV) 1 IgM Serum Test test available at DNA Labs India for ₹819. Uses Enzyme Immunoassay (EIA) on Serum samples. Results in Sample receipt: Tuesday / Friday by 9:00 AM. Report: Same day.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Kothari Ramesh Shantilal
Consultant Microbiologist · Reg: 27670
Last reviewed: September 7, 2026
Overview
The purpose of the HSV-1 IgM Serum Test is to detect IgM antibodies against Herpes Simplex Virus type 1 in the blood, helping to diagnose a recent or active primary HSV-1 infection. This test aids clinicians in confirming suspected herpesvirus infections, evaluating patients with orolabial lesions or encephalitis of unknown origin, and monitoring pregnant women who lack prior HSV-1 immunity. Early detection through serology enables timely antiviral therapy and informed counseling regarding disease transmission and management.
- Test Code
- 738
- CPT Code
- 86694
- ICD Code
- B00.9
- Price
- ₹819
- Sample Type
- Serum
- Result Time
- Sample receipt: Tuesday / Friday by 9:00 AM. Report: Same day.
- Fasting Required
- No
- Method
- Enzyme Immunoassay (EIA)
Sample Collection
No special preparation such as fasting is required before sample collection. Inform the phlebotomist or healthcare provider about any current medications, recent immunoglobulin therapy, or blood transfusions, as these may affect test results.
Method: Venipuncture
Laboratory Analysis
A standard venipuncture will be performed to collect approximately 2 mL of blood from a vein in the arm. The area will be cleaned with an antiseptic wipe before needle insertion. Mild discomfort or a small bruise may occur at the puncture site.
Report Delivery
Apply gentle pressure with a cotton ball or gauze at the puncture site for a few minutes to stop any minor bleeding. A small bandage will be placed over the site. Avoid heavy lifting with the collection arm for the remainder of the day. No specific post-test restrictions are required.
Timeline: Sample receipt: Tuesday / Friday by 9:00 AM. Report: Same day.
Patient Instructions
About This Test
Who Should Get This Test
The purpose of the HSV-1 IgM Serum Test is to detect IgM antibodies against Herpes Simplex Virus type 1 in the blood, helping to diagnose a recent or active primary HSV-1 infection. This test aids clinicians in confirming suspected herpesvirus infections, evaluating patients with orolabial lesions or encephalitis of unknown origin, and monitoring pregnant women who lack prior HSV-1 immunity. Early detection through serology enables timely antiviral therapy and informed counseling regarding disease transmission and management.
How to Prepare
- No fasting is required before sample collection
- Wear a short-sleeved or loose-fitting shirt for easy access to the arm
- Inform the phlebotomist about any history of fainting during blood draws
- Stay hydrated by drinking water before the test
- Avoid vigorous exercise with the collection arm immediately after the draw
Doctor's Notes
Reviewed by Dr Kothari Ramesh Shantilal — MBBS, MD (Microbiology) · Reg. No. 27670
"HSV-1 IgM antibodies indicate a recent or active primary infection with Herpes Simplex Virus type 1. This test is particularly valuable in evaluating pregnant women without prior HSV-1 exposure, patients presenting with orolabial lesions, and cases of suspected herpes encephalitis. A positive IgM result should be interpreted alongside clinical findings and, when possible, confirmed with HSV-1 IgG testing and molecular methods. IgM antibodies typically appear within 1 to 2 weeks of initial infection and may persist for several weeks. Clinicians should note that IgM can occasionally cross-react between HSV-1 and HSV-2, so definitive type-specific diagnosis may require additional testing."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or lipemic serum samples
- Samples collected in incorrect tube type (non-SST)
- Insufficient sample volume (less than 1 mL serum)
- Samples left at room temperature beyond 2 hours
- Samples with visible microbial contamination
Understanding Your Results
Negative (Index < 0.90)
No detectable HSV-1 IgM antibodies. This may indicate no recent or active primary HSV-1 infection. If clinical suspicion is high and symptoms are present, repeat testing in 2 to 4 weeks is recommended as early infection may not have triggered detectable IgM levels.
Equivocal (Index 0.90 - 1.10)
Borderline result that cannot be definitively classified. Repeat testing in 2 to 4 weeks is recommended to determine if antibody levels are rising or declining. Clinical correlation is essential.
Positive (Index > 1.10)
HSV-1 IgM antibodies detected, suggesting a recent or active primary Herpes Simplex Virus type 1 infection. Clinical correlation is necessary. Consider HSV-1 IgG testing to determine prior exposure status and PCR testing of lesion swabs for definitive confirmation.
Consult a healthcare provider if you have a positive or equivocal HSV-1 IgM result and are experiencing symptoms such as painful oral blisters, fever, or neurological signs. Pregnant women with a positive result should seek immediate obstetric consultation. If you have been exposed to someone with confirmed HSV-1, or if you have a weakened immune system, discuss the results with your doctor for appropriate management and antiviral treatment options.
Limitations
- ⚠IgM antibodies alone cannot definitively distinguish between HSV-1 and HSV-2 due to antigenic cross-reactivity
- ⚠A positive IgM result does not confirm the timing of infection with certainty; IgM can be detected during recurrent episodes in some patients
- ⚠This test should not be used as the sole basis for diagnosis; clinical correlation and additional confirmatory testing are recommended
- ⚠Sensitivity may be reduced in immunocompromised patients who may not mount an adequate antibody response
- ⚠Negative results do not rule out HSV-1 infection if tested too early before seroconversion
Risks & Considerations
- ●Minor bruising or soreness at the venipuncture site
- ●Slight risk of infection at the puncture site (extremely rare)
- ●Rare possibility of fainting during or after blood draw
- ●Very small risk of hematoma formation at the collection site
Interfering Factors
- ●Cross-reactivity between HSV-1 and HSV-2 IgM antibodies may produce false-positive results
- ●Recent administration of immunoglobulin therapy or blood transfusion may interfere with antibody detection
- ●Immunosuppressive medications or conditions may reduce antibody production leading to false negatives
- ●Very early infection before seroconversion may yield negative results despite active infection
- ●Presence of heterophilic antibodies may occasionally cause false-positive EIA results
Compare With Similar Tests
| Test | Herpes Simplex Virus (HSV) 1 IgM Serum Test | HSV-1 IgG Serum Test | HSV-2 IgM Serum Test | HSV PCR (Swab) |
|---|---|---|---|---|
| Comparison | Herpes Simplex Virus (HSV) 1 IgM Serum Test |
Frequently Asked Questions
What is the Herpes Simplex Virus (HSV) 1 IgM Serum Test?
What does a positive HSV-1 IgM result mean?
Is fasting required before the HSV-1 IgM test?
What sample type is needed for this test?
How much does the HSV-1 IgM Serum Test cost at DNA Labs India?
When will I receive my HSV-1 IgM test results?
What is the difference between HSV-1 IgM and HSV-1 IgG tests?
Why is the HSV-1 IgM test important for pregnant women?
Can HSV-1 IgM antibodies cross-react with HSV-2?
Is home sample collection available for this test?
What does a negative HSV-1 IgM result mean?
Do I need a doctor's prescription for the HSV-1 IgM test?
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