Neutrophil count (absolute)

What Are Neutrophils?

Neutrophils are a key part of your immune system. They’re the most common type of white blood cell and are responsible for attacking bacteria and other invaders in your bloodstream. When you have an infection, your body often produces more neutrophils to help fight it off. This test helps doctors assess whether your immune system is responding normally to infections or if there might be an underlying issue.

Why Might You Need This Test?

Doctors may order a neutrophil count test to diagnose or monitor conditions like infections (such as pneumonia or urinary tract infections), certain cancers (like leukemia), autoimmune diseases, or other blood disorders. It can also help track how well your treatment is working or check for signs of an overactive immune response.

What to Expect Before the Test

No special preparation is usually needed for this test. You may have a small needle inserted into a vein (typically in your arm) to draw a blood sample. The process is quick and often done in a doctor’s office or lab. If you’re nervous, let your healthcare provider know—they can help make it more comfortable.

What Happens During the Test?

A healthcare professional will clean the area with an antiseptic, insert a needle into your vein, and collect a small amount of blood. The sample is then sent to a lab for analysis. The test itself takes only a few minutes, and you may feel a brief pinch or sting. Most people don’t need any recovery time.