Davis's Lab & Diagnostic Tests

Complete Blood Count, WBC Count and Differential

Complete Blood Count, WBC Count and Differential was found in Davis's Lab & Diagnostic Tests which delivers information on how the test works, how to accurately interpret results, and how to provide the best care to your patients before, during, and after a test.

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Davis's Lab and Diagnostic Tests

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WBC with diff, leukocyte count, white cell count.

Common Use:
To evaluate viral and bacterial infections and to assist in diagnosing and monitoring leukemic disorders.

Whole blood from one full lavender-top (EDTA) tube.

Normal Findings:
(Method: Automated, computerized, multichannel analyzers. Many analyzers can determine a five- or six-part WBC differential. The six-part automated WBC differential identifies and enumerates neutrophils, lymphocytes, monocytes, eosinophils, basophils, and immature granulocytes (IG), where IG represents the combined enumeration of promyelocytes, metamyelocytes, and myelocytes as both an absolute number and a percentage. The five-part WBC differential includes all but the immature granulocyte parameters.)

White Blood Cell Count and Differential
AgeConventional Units WBC ×103/microLNeutrophilsLymphocytesMonocytesEosinophilsBasophils
(Absolute) and % (Absolute) and % (Absolute) and % (Absolute) and % (Absolute) and %
Birth9.1–30.1(5.5–18.3) 24–58%(2.8–9.3) 26–56%(0.5–1.7) 7–13%(0.02–0.7) 0–8%(0.1–0.2) 0–2.5%
1–23 mo6.1–17.5(1.9–5.4) 21–67%(3.7–10.7) 20–64%(0.3–0.8) 4–11%(0.2–0.5) 0–3.3%(0–0.1) 0–1%
2–10 yr4.5–13.5(2.4–7.3) 30–77%(1.7–5.1) 14–50%(0.2–0.6) 4–9%(0.1–0.3) 0–5.8%(0–0.1) 0–1%
11 yr–older adult4.5–11.1(2.7–6.5) 40–75%(1.5–3.7) 12–44%(0.2–0.4) 4–9%(0.05–0.5) 0–5.5%(0–0.1) 0–1%
*SI Units (Conventional Units × 1 or WBC count x 109/L).

White Blood Cell Count and Differential
AgeImmature Granulocytes (Absolute) (103/microL)Immature Granulocyte Fraction (IGF) (%)
Birth–9 yr0–0.030–0.4%
10 yr−older adult0–0.090–0.9%

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