What is this test?
This serology test measures IgM antibodies. It assesses the immune response in blood rather than directly detecting the organism and does not establish a diagnosis by itself.
Why might it be ordered?
- If specifically ordered, to discuss the result together with symptoms and more appropriate HSV tests.
- As an adjunct to clinical assessment, recognising that IgM does not reliably establish HSV type or timing.
What sample is needed?
Serology normally uses a blood specimen. Confirm the exact material and whether other markers should be measured at the same time.
How should you prepare?
Special dietary preparation is usually unnecessary. Follow laboratory instructions and report treatment, symptoms, and the possible exposure date.
How should you understand the result?
HSV IgM is not type-specific, may be reactive during a recurrent episode, and does not prove recent infection. Because of these limitations, CDC does not recommend HSV IgM for diagnosis.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.
- How to Prepare for a Lab Test — MedlinePlus, U.S. National Library of Medicine
- How to Understand Your Lab Results — MedlinePlus, U.S. National Library of Medicine
- Antibody Serology Tests — MedlinePlus, U.S. National Library of Medicine
- Herpes — STI Treatment Guidelines — U.S. Centers for Disease Control and Prevention