Neutrophil count (absolute)

What Is a Neutrophil Count?

Neutrophils are a type of white blood cell that play a critical role in your body’s immune response. They are the most abundant type of white blood cell and are primarily responsible for fighting off bacterial infections. Your neutrophil count is measured to assess how well your immune system is responding to infections or other conditions that may affect white blood cells.

Why Might You Need This Test?

Doctors may order a neutrophil count test to diagnose or monitor conditions such as infections (especially bacterial), certain blood disorders, or immune system issues. It can also help evaluate how your body is responding to treatments for diseases like cancer or autoimmune disorders.

How Is the Test Performed?

A small sample of blood is taken from a vein, usually in your arm. The blood is then analyzed in a lab to count the number of neutrophils. This test is typically done as part of a complete blood count (CBC).

What Do Results Mean?

Results can be interpreted in relation to your overall health and medical history. Very low neutrophil counts (neutropenia) may indicate an increased risk of infections, while very high counts (neutrophilia) could suggest inflammation, infection, or other underlying conditions. Your doctor will discuss the results with you in the context of your symptoms and medical history.