Granulocyte count (absolute)

What Is a Granulocyte Count?

Granulocytes are a subtype of white blood cells that include neutrophils, eosinophils, and basophils. They play a critical role in defending your body against bacteria, fungi, and other pathogens. This test specifically counts the absolute number of granulocytes in your bloodstream, which can provide insight into your immune response and overall health status.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like frequent infections, unexplained fatigue, swelling, or signs of inflammation. It can also be used to monitor conditions such as autoimmune diseases, certain cancers, or after treatments that affect the immune system.

How Is the Test Performed?

A small blood sample is drawn from a vein, usually in your arm. The sample is then analyzed in a laboratory to count the granulocytes. This process typically takes a few minutes and is generally painless.

What Do Results Mean?

Results are reported as an absolute count of granulocytes per microliter (µL) of blood. While specific reference ranges vary by lab, lower than expected counts may indicate immune suppression, while higher counts could suggest infection, inflammation, or other underlying issues.