Lymphocyte Proliferation Assay (Stimulated Blood Lymphocyte Count)
This test measures how your immune system’s lymphocytes (white blood cells) respond to stimulation, often used to assess immune function or detect conditions affecting lymphocyte activity.
["Helps doctors evaluate how well your immune cells are working after stimulation."]
Key facts at a glance
- LOINC
- 74952-3
- Short code
- Lymphocyte prolif Bld-Imp Nar
- Synonyms
- Lymphocyte prolif Bld-Imp Nar
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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 the Test Measures
The test involves collecting a small sample of your blood and stimulating the lymphocytes with specific signals (e.g., phytohemagglutinin or other mitogens). After a set period, the number of dividing (proliferating) lymphocytes is counted. This reflects your immune system’s ability to respond to infection or other triggers.
Why It’s Ordered
Doctors may order this test if you have symptoms of immune dysfunction (e.g., frequent infections, fatigue, or autoimmune reactions) or if you’re undergoing treatment that could affect your immune cells, such as chemotherapy or immunosuppressive medications.
Sample Collection and Preparation
A blood sample is drawn from a vein, typically in your arm. The sample is processed to isolate lymphocytes, which are then exposed to a stimulant. The test may require additional time for incubation before results are analyzed.
What to Expect Before the Test
No special preparation is usually needed, but inform your healthcare provider about any medications (especially blood thinners or steroids) or recent illnesses that could affect results.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Low lymphocyte proliferation may indicate immune suppression (e.g., due to HIV, chemotherapy, or certain infections). High or abnormal responses could suggest autoimmune disorders, chronic inflammation, or other underlying conditions affecting lymphocyte function. This test is often used alongside other blood tests to guide treatment decisions.
Short name
Lymphocyte Proliferation Test
Frequently asked questions
What does a low lymphocyte proliferation mean?
How long does it take to get results?
Can lifestyle changes affect 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