The Differential Count is part of a Complete Blood Count (CBC).

It provides detailed information about the distribution of white blood cells, which play a vital role in immunity.

Doctors use DC to:

Identify infections (bacterial, viral, parasitic).

Detect allergic reactions and inflammatory conditions.

Monitor bone marrow and immune system function.

Support diagnosis of blood cancers like leukemia.

The test is performed using a blood sample and analyzed under a microscope or automated analyzer.

Analytes/Parameters Measured (WBC types):

Neutrophils: Fight bacterial infections.

Lymphocytes: Defend against viral infections and regulate immune response.

Monocytes: Help remove dead cells and fight chronic infections.

Eosinophils: Involved in allergic reactions and defense against parasites.

Basophils: Play a role in allergic responses and inflammation.

Normal Range (approximate % of total WBCs):

Neutrophils: 40–70%

Lymphocytes: 20–40%

Monocytes: 2–10%

Eosinophils: 1–6%

Basophils: <1%

Clinical Use:

Differentiates between bacterial vs viral infections.

Detects allergic and parasitic conditions.

Assists in diagnosing hematologic disorders.

Monitors immune system health.