Horseradish Peroxidase (HRP) Activity in Serum/Plasma
This test measures the activity of horseradish peroxidase, an enzyme naturally present in certain plants and used in some medical tests to detect or quantify other substances.
["HRP activity may be involved in certain diagnostic or research processes, often linked to enzyme-linked immunoassays (ELISA)."]
Key facts at a glance
- LOINC
- 7418-7
- Short code
- Horse Dander BasoBnd Ab Qn
- Synonyms
- Horse Dander BasoBnd Ab Qn
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- lhr
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What Is Horseradish Peroxidase Used For?
Horseradish peroxidase (HRP) is primarily used in laboratory settings as an enzyme marker in immunoassays. It helps amplify the detection of specific antibodies or antigens by catalyzing a chemical reaction that produces a measurable signal. This can be part of screening or confirmatory tests for conditions like autoimmune diseases, infections, or certain cancers.
How Is This Test Performed?
A blood sample (serum or plasma) is collected and analyzed using an immunoassay method, which may involve exposing the sample to HRP-labeled antibodies. The enzyme’s activity is then measured to determine its concentration or functional role in the test.
Who Might Need This Test?
This test is not commonly ordered for routine patient care but may be used in specialized research, diagnostic research protocols, or specific clinical studies where HRP-based assays are employed. Your healthcare provider may recommend it if you’re part of a study or have a condition requiring enzyme-linked detection.
What Does a Result Mean?
Interpretation depends entirely on the context of the test, such as whether it’s part of a screening, research study, or confirmatory assay. Results may indicate enzyme activity levels relevant to the specific assay being performed, but general reference ranges are not applicable here.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
HRP Activity
Frequently asked questions
Why would my doctor order this test?
What does a high or low HRP activity result mean?
Can this test be done at home?
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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy