Eosinophils
- Sample Type
- Standard
- Fasting
- No
- Unit
- %
Eosinophils are a type of white blood cell (granulocyte) primarily responsible for combating multicellular parasites and modulating Type I immediate hypersensitivity (allergic) reactions. In a differential count, the percentage of eosinophils helps clinicians identify allergic asthma, hay fever, drug reactions, or parasitic infestations (helminths). They also play a role in chronic inflammatory conditions like Eosinophilic Esophagitis.
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Eosinophil counts can fluctuate significantly based on time of day (diurnal variation) and recent corticosteroid use, which can mask an underlying eosinophilia. Mild elevations are often non-specific and may require serial testing or absolute count calculation (ANC) for clinical relevance.
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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