Certification in Infection Prevention and Control (CIC) 2025 – 400 Free Practice Questions to Pass the Exam

The normal range for neutrophils in a differential white blood cell count is typically between 55% and 70% of the total white blood cell count. Neutrophils are a type of white blood cell that plays a crucial role in the immune response, particularly in fighting off infections, especially bacterial infections.

When evaluating a complete blood count (CBC) with differential, percentages of various white blood cell types indicate how the body's immune system is functioning and whether there are any anomalies in the white blood cell populations. The specified range reflects a healthy immune response under normal circumstances.

The other ranges provided do not represent standard clinical findings for neutrophil levels. Values below 55% may indicate lymphocytosis or other immune changes, while values above 70% could suggest an acute infection or stress response, and would not be classified as normal. Therefore, the 55% to 70% range is widely accepted in clinical settings as indicative of normal neutrophil levels in a healthy individual.