What are white blood cells?
White blood cells or leukocytes are important cells of the immune system. They work to protect the body against foreign invaders and infection causing organisms. They are derived from hematopoietic stem cells.
What is WBC count or TLC?
White blood cell count or Total leukocyte count is a lab test to measure the amount of white blood cells present in the blood. WBCs are of five types:
- Lymphocytes
- Neutrophils
- Eosinophils
- Basophils
- Monocytes
Why is WBC count done?
- To diagnose infection and inflammation
- To diagnose blood disorders
- To diagnose autoimmune disorders
- To diagnose immune deficiencies
- What are the symptoms of an abnormal WBC count?
Symptoms of an abnormal WBC count include:
- High temperature
- Headache
- Fatigue
- Chills
- Where is the blood withdrawn from?
Blood samples are withdrawn either from a vein in the arm or the back of your hand.
- Will this test disturb my daily routine?
No, this test takes hardly two minutes and the patients only feel a minor discomfort. You can continue your daily activities immediately after the test.
- What medicines can affect my test?
Before this test, inform your doctor of your medicine use; especially about:
- Corticosteroids
- Heparin
- Quinidine
- Antibiotics
- What is leukopenia?
Leukopenia means low levels of white blood cells in the body. It makes the body more susceptible to infections.
Interpretation of the result:
Ranges:
Newborns: 9,000 - 30,000/mm3
Children below 2 years age: 6,200 - 17,000/mm3
Children over 2 years age: 5,000 - 10,000/ mm3
Adults: 5,000 - 10,000/mm3
Causes of High TLC:
- Infection
- Inflammation
- Leukemia
- Smoking
Causes of Low TLC:
- Immune disorders
- Bone marrow damage
- Liver diseases
- Spleen disease
