Herpes Simplex Virus Type 1 Immunoglobulin M Antibody (IgM) – Serum/Plasma
This test measures the presence of IgM antibodies against Herpes Simplex Virus Type 1 (HSV-1) in your blood. IgM antibodies are often produced shortly after infection and can help identify recent exposure.
["IgM antibodies for HSV-1 may indicate a recent infection, but they can also be present in some chronic cases."]
Key facts at a glance
- LOINC
- 88457-7
- Short code
- HSV1 IgM CSF Ql IF
- Synonyms
- HSV1 IgM CSF Ql IF
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- if
- CPT
- 82784
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
Herpes Simplex Virus Type 1 (HSV-1) is a common virus that can cause cold sores and other infections. IgM antibodies are part of your immune system’s response to infection. This test detects these antibodies in your blood to help determine if you may have been recently exposed to HSV-1.
Why It Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like cold sores, recurrent mouth ulcers, or if you’ve been exposed to someone with HSV-1. It can also be used to monitor certain conditions where HSV-1 infection is a concern.
What to Expect Before the Test
No special preparation is usually needed. You may have a small needle inserted into your arm to draw blood. If you’re taking blood from your own arm, follow your healthcare provider’s instructions carefully to avoid infection or discomfort.
What to Expect After the Test
After the blood is drawn, you may feel a slight pinch or bruising at the site. Apply gentle pressure to stop any bleeding. Most people feel fine afterward, but if you experience excessive pain or swelling, contact your provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
IgM antibodies for HSV-1 are typically detected shortly after infection (within weeks). They can help confirm a recent exposure, but they may not persist long-term. IgM levels alone are not definitive for chronic infection. If you have symptoms or risk factors, your provider may also consider other tests or clinical evaluation.
Short name
HSV-1 IgM Antibody
Frequently asked questions
How long does it take to get results?
Can IgM antibodies for HSV-1 be false positive?
What does a positive result mean?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy