What Are Neutrophils?
Neutrophils are a type of white blood cell that helps the body fight infections and heal injured tissues.
Neutrophils are produced in the bone marrow, and they make up 55 to 70 percent of the total white blood cell count.
What Is a Normal Neutrophil Count?
- Low levels of neutrophils are below 1.5 mcL or less than 45 percent of total white blood cells
- If levels are between 1.0 to 1.5 mcL, it is considered mild
- If levels are between 0.5 and 1.0 mcL, it is considered moderately low
- Levels of less than 0.5 mcL are considered severe low levels of neutrophils
- Normal adult levels of neutrophils are about 1,500 to 8,000 or 1.5 to 8.0 neutrophils per microliters (mcL)
- High levels of neutrophils are more than 8000 neutrophils per mcL or 8.0 mcL
What Does It Mean When Your Neutrophils Are High?
High levels of neutrophils in the blood are called neutrophilic leukocytosis or neutrophilia.
Causes of high levels of neutrophils in the blood (neutrophilia) include:
- Inflammatory conditions
- Certain medications
- Smoking tobacco
- Endocrine disorders
- Pregnancy-associated conditions
- Post-partum state
- Certain cancers
- Genetic conditions
- Down syndrome
- Leukocyte adhesion deficiency (LAD)
- Chronic neutrophilic leukemia (CNL)
- Cryopyrin-associated periodic syndromes
- Surgical removal of the spleen