WBC Differential on the NCLEX
Neutrophils, lymphocytes, eosinophils, basophils: what each tells you.
WBC count plus differential. NCLEX tests left shift, lymphocyte changes, eosinophilia.
Normal WBC
4-11 × 10^9/L.
Neutrophils (50-70%)
Bacterial infection raises. Left shift (bands, immature) suggests acute bacterial. Neutropenia (ANC <500): infection risk emergency.
Lymphocytes (20-40%)
Viral infections raise. CLL very high. HIV: low CD4 specifically.
Eosinophils (1-4%)
Allergies, parasites, drug reactions.
Basophils (<1%)
Rare elevations. CML.
Frequently asked
How to calculate ANC?
WBC × (% neutrophils + % bands) / 100.
Stress demargination?
Acute stress (steroids, exercise) shifts WBCs from vessel walls to circulation, transient leukocytosis without infection.
Quick check
Loading a question…
How ready are you right now?
10 real NCLEX questions, free, in your browser. See how close you are to ready and which subjects are costing you.
Try 10 questions free