Myeloperoxidase Antibody Titration (Serum)
This test measures the level of antibodies against myeloperoxidase, an enzyme found in white blood cells. It helps evaluate conditions like autoimmune diseases or certain blood disorders.
["This test may help diagnose or monitor conditions linked to immune system activity or blood cell function."]
Key facts at a glance
- LOINC
- 51801-9
- Short code
- Myeloperoxidase Ab Titr Ser IF
- Synonyms
- Myeloperoxidase Ab Titr Ser IF
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- if
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms or conditions associated with abnormal immune responses, such as chronic inflammation, autoimmune diseases, or certain blood disorders. It could also be used to monitor treatment progress or check for hidden immune-related issues.
What to Expect Before the Test
No special preparation is usually needed. You may fast for 8–12 hours before the test if instructed, but always follow your provider’s specific instructions. Bring any medications you’re taking to discuss with them.
How the Test Is Performed
A blood sample is drawn from a vein in your arm, typically in a clinic or lab setting. The blood is processed to separate serum, which is then tested for myeloperoxidase antibodies using an immunoassay method.
What the Results Mean
Results are qualitative (positive or negative) rather than numeric. A positive result suggests the presence of antibodies against myeloperoxidase, which may indicate an immune response. Your provider will interpret results in the context of your symptoms and medical history.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated myeloperoxidase antibodies can be linked to autoimmune conditions (e.g., systemic lupus erythematosus) or certain blood disorders (e.g., myeloperoxidase-related vasculitis). They may also appear in people with chronic infections or inflammatory diseases. This test is rarely used alone but can support a broader diagnostic workup.
Short name
Myeloperoxidase Antibody Test
Frequently asked questions
What does a positive result mean?
Can this test be done at home?
How often might I need this test?
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