What it means
Also called a leukocyte. The five main types are neutrophilNOO-truh-filThe most common type of white blood cell, which is first to reach and destroy bacteria at a site of infection.Full entry (first to fight bacteria), lymphocytes (make antibodies and attack virus-infected cells), monocytes, eosinophils (allergy and parasites) and basophils. They are made in the bone marrowbone MAIR-ohThe soft, spongy tissue inside bones that makes blood cells.Full entry . The white cell count and differential are part of the complete blood countkum-PLEET blud kowntA common blood test that counts and measures the red cells, white cells and platelets in the blood.Full entry .
For the nurse
A high count (leukocytosis) is common with infection, inflammation, stress and steroids. A low count (leukopenia), as after chemotherapy, raises infection risk: use strict hand hygiene and report any fever right away.
At a glance
| Normal range | 5,000–10,000/mm3 [5–10 × 10^9/L]; each lab sets its own reference range. |
|---|---|
| Abbreviations | WBC |
| Spanish | glóbulo blanco |
| Also written | white blood cells, WBC, WBCs, white-blood-cell, leukocyte, leukocytes |
Related terms
bone marrow
The soft, spongy tissue inside bones that makes blood cells.
immune system
The body's defense system of cells, tissues and organs that fights germs and other foreign substances.
complete blood count
A common blood test that counts and measures the red cells, white cells and platelets in the blood.
infection
The entry and growth of germs, such as bacteria, viruses, fungi or parasites, in the body.
neutrophil
The most common type of white blood cell, which is first to reach and destroy bacteria at a site of infection.