Know Your Blood Parameter : Eosinophils

1. Parameter Name 

Eosinophils

2. Test Type 

Blood

3. Normal Range

• Absolute Count: 0 – 500 cells/µL

• Percentage: 1% – 4% of total WBCs

  
  

4. High Levels Indicate 

Eosinophilia — common causes include allergies (asthma, eczema, hay fever), parasitic infections (e.g., roundworms), autoimmune diseases, certain cancers (e.g., Hodgkin’s lymphoma), and eosinophilic disorders.

5. Low Levels Indicate 

Eosinopenia — often insignificant alone but can occur in response to stress, Cushing's syndrome, or corticosteroid use.

6. Why It's Tested 

To detect allergic conditions, parasitic infections, autoimmune issues, or monitor drug reactions.

7. Associated Symptoms (if abnormal)

• High: Wheezing, skin rashes, abdominal pain, chronic cough (due to allergy or parasitic infection)

• Low: Usually asymptomatic unless part of broader immune suppression

  
  

8. What To Do If Abnormal 

Identify and treat the underlying cause (e.g., allergens, infections). Further evaluation may involve stool test for parasites or allergy panel testing.

9. Common Conditions Related 

Asthma, eczema, eosinophilic esophagitis, parasitic infections, allergic rhinitis.

10. Nutrition or Lifestyle Connection 

Manage allergies by avoiding triggers, consider anti-inflammatory diet (e.g., turmeric, omega-3s), and ensure proper hygiene to prevent parasitic infections.

11. References (APA Format)

• MedlinePlus. (2023). Eosinophil count. U.S. National Library of Medicine. https://medlineplus.gov/lab-tests/eosinophil-count/

• Pagana, K. D., & Pagana, T. J. (2021). Mosby’s diagnostic and laboratory test reference (15th ed.). Elsevier.

• Mayo Clinic. (2022). Complete blood count (CBC). https://www.mayoclinic.org/tests-procedures/complete-blood-count

• National Heart, Lung, and Blood Institute. (2022). What are eosinophils? https://www.nhlbi.nih.gov/