Granulocyte Absolute Count (Automated Blood Cell Differential)

What Is a Granulocyte Count?

Granulocytes are a subgroup of white blood cells that include neutrophils, eosinophils, and basophils. They play a key role in defending your body against bacteria, viruses, and other pathogens. An automated blood cell differential test uses a machine to count these cells, providing a snapshot of your immune system’s response to infection or inflammation.

Why Might You Need This Test?

Doctors may order a granulocyte count to diagnose or monitor conditions such as infections (e.g., bacterial infections), autoimmune diseases, blood disorders (e.g., leukemia), or reactions to medications. It can also help evaluate how well your immune system is functioning after treatment.

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 lab using automated technology to count granulocytes and other blood cells. Results are typically available within a few days.

What Do the Results Mean?

Results are expressed as a count of granulocytes per microliter (µL) of blood. While specific reference ranges vary by lab, very high or very low counts may signal underlying health concerns that need further investigation.