Eosinophils
- Sample Type
- Standard
- Fasting
- No
- Unit
- %
Eosinophils are a specialized type of white blood cell (leukocyte) primarily involved in the body's response to allergic diseases, parasitic infections, and certain types of inflammation. As part of a TCDC-X (Differential Count), the eosinophil percentage helps clinicians differentiate between bacterial infections (where neutrophils typically rise) and allergic or parasitic conditions. They also play a role in the pathology of asthma and certain autoimmune conditions.
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Eosinophil counts exhibit a significant diurnal rhythm, usually being lowest in the morning and highest at night. Recent use of corticosteroids can rapidly deplete eosinophil levels (eosinopenia), potentially masking an underlying condition. Furthermore, the percentage can be misleading if the total white blood cell count is abnormally high or low.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Eosinophils:
Official Sources
- Eosinophilia - Mayo ClinicMayo Clinic
Research & Guidelines
- PubMed: Eosinophils Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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