Know Your Blood Parameter : Lymphocytes
- Zeenat Khalil
- May 24
- 1 min read
Updated: May 27
1. Parameter Name
Lymphocytes
2. Test Type
Blood
3. Normal Range
Absolute count: 1,000 – 4,800 cells/µL
Percentage: 20% – 40% of total WBCs
4. High Levels Indicate
Lymphocytosis — may be caused by viral infections (e.g., mononucleosis, hepatitis), chronic bacterial infections, certain cancers (like CLL), or autoimmune disorders.
5. Low Levels Indicate
Lymphocytopenia — often linked to HIV/AIDS, corticosteroid use, autoimmune diseases, bone marrow suppression, or chemotherapy.
6. Why It's Tested
To assess immune status, detect viral infections, and monitor diseases like leukemia or HIV.
7. Associated Symptoms (if abnormal)
High: Swollen lymph nodes, fatigue, fever (usually from infection or inflammation)
Low: Repeated infections, delayed wound healing, chronic fatigue.
8. What To Do If Abnormal
Seek evaluation to determine the underlying cause. Additional tests may include flow cytometry, HIV testing, or bone marrow biopsy.
9. Common Conditions Related
Viral infections (e.g., EBV, CMV), chronic lymphocytic leukemia (CLL), HIV, autoimmune diseases.
10. Nutrition or Lifestyle Connection
Support immune health with adequate protein, zinc, vitamins C, D, and B12. Manage stress and ensure proper sleep to maintain immunity.
11. References (APA Format)
MedlinePlus. (2023). Lymphocyte count. U.S. National Library of Medicine. https://medlineplus.gov/lab-tests/lymphocyte-count/
Pagana, K. D., & Pagana, T. J. (2021). Mosby’s diagnostic and laboratory test reference (15th ed.). Elsevier.
Mayo Clinic. (2022). Complete blood count with differential. https://www.mayoclinic.org/tests-procedures/complete-blood-count
American Society of Hematology. (2021). Understanding lymphocyte function. https://www.hematology.org/education/patients
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