Segmented neutrophils (segs)

This lab test is used to look for inflammation and infection.

Segmented neutrophils (segs) Overview

Reviewed: April 22, 2014

Neutrophils are the most abundant type of white blood cells in the body. Segmented neutrophils are the mature neutrophils that respond to inflammation & infection.

Segmented neutrophils are measured as a percentage. Normal range for segmented neutrophils is 50-65%.


Blood draw


Fasting is not required before the test

What the results mean

Increased neutrophil levels are mainly seen when a high level of stress is placed on the body or when an acute infection is present, but can be seen with conditions such as, allergies, anemia, anxiety, eclampsia, cancer, burns, Cushing's syndrome, and diabetic acidosis. Certain medications, such as corticosteroids, can also cause a high neutrophil count.

Lower than normal levels can be seen when there is a severe infection or sepsis present, immunodeficiency, or bone marrow damage.