Segmented neutrophils (segs)

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

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.