White blood cells (WBCs) are essential components of the immune system, defending the body against infections.

The TC test provides the absolute number of WBCs in blood.

Clinical uses include:

Detecting infections (bacterial, viral, parasitic).

Identifying inflammatory or autoimmune conditions.

Monitoring bone marrow function and immune status.

Supporting diagnosis of hematologic disorders such as leukemia.

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

Analyte: Total white blood cell count.

Normal Range: 4,000 – 11,000 cells/µL of blood (varies slightly by lab).

High TC (Leukocytosis): May indicate bacterial infection, inflammation, stress, or blood cancers.

Low TC (Leukopenia): May indicate viral infection, bone marrow suppression, autoimmune disease, or drug effects.

Clinical Use:

Provides insight into immune system activity.

Detects abnormal WBC production or destruction.

Guides further diagnostic testing and treatment.