Eosinophil Count (Peripheral Blood)
This test measures the number of eosinophils, a type of white blood cell, in your blood. Eosinophils help fight infections and respond to allergies and inflammation.
["Eosinophils help protect your body from harmful substances and infections."]
Key facts at a glance
- LOINC
- 14709-0
- Short code
- Eosinophil NFr Bronch Manual
- Synonyms
- Eosinophil NFr Bronch Manual
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- manual-count
- 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 order this test to check for conditions like allergies, asthma, parasitic infections, or certain types of cancers. It can also help evaluate symptoms such as persistent itching, skin rashes, or unexplained fatigue.
What to Expect Before the Test
You won’t need any special preparation. This test is typically done by taking a small blood sample from a vein in your arm. It usually takes a few minutes and is generally painless.
What the Results Mean
Results are compared to standard ranges for healthy adults. High levels may indicate allergies, infections, or inflammatory conditions, while very low levels might suggest immune system issues or certain medications.
Common Conditions Affecting Eosinophil Levels
Elevated eosinophils can be linked to allergies, asthma, parasitic diseases, or autoimmune disorders. Low eosinophil counts may be associated with conditions like severe infections, certain cancers, or immune deficiencies.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated eosinophils can signal allergic reactions, chronic inflammatory diseases, or parasitic infections, while low levels may indicate immune suppression or other underlying health concerns. Always discuss results with your healthcare provider for personalized interpretation.
Short name
Eosinophil Level
Frequently asked questions
What causes eosinophils to be high in my blood?
What does it mean if my eosinophil count is low?
Can diet or lifestyle affect eosinophil levels?
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