Normal Reference Ranges
Adult
4.5 - 11.0 x10³/µL
Pediatric
5.0 - 15.0 (varies by age) x10³/µL
Clinical Significance
Primary indicator of infection or inflammation. Needs differential (neutrophils, lymphocytes) for specific etiology.
Causes of High
- Infection (bacterial)
- Inflammation
- Leukemia
- Stress/Trauma
- Corticosteroids
Causes of Low
- Viral infections
- Bone marrow failure
- Chemotherapy
- Autoimmune disease (Lupus)