Normal Reference Ranges
Adult
2,500 - 8,000 cells/µL
Pediatric
Varies by age cells/µL
Clinical Significance
Primary first responders to bacterial infections. A 'left shift' indicates an increase in immature neutrophils (bands), heavily suggesting an acute infectious/inflammatory process.
Causes of High
- Acute bacterial infection
- Inflammation / Stress
- Glucocorticoids (demargination)
- Leukemia (CML)
Causes of Low
- Viral infections
- Chemotherapy / Radiation
- Aplastic anemia
- Severe sepsis (consumption)