Absolute Lymphocyte Count (ALC), Whole Blood

What it is:
This test measures the number of lymphocytes, a type of white blood cell essential for immune defense, in the blood.

Uses

• Evaluate overall immune system health

• Detect infections, lymphomas, or leukemia

• Monitor HIV/AIDS progression

Symptoms That May Lead to the Test

• Frequent or recurrent infections

• Swollen lymph nodes

• Fever, weight loss, or night sweats

• Chronic fatigue

Abnormal Results

• High levels:

  • Viral infections (e.g., EBV, CMV)

  • Chronic lymphocytic leukemia (CLL)

  • Autoimmune diseases

• Low levels:

  • HIV/AIDS

  • Chemotherapy effects

  • Bone marrow suppression

  • Severe infections

Risks

• Minimal, limited to risks of a blood draw (mild pain, bruising, dizziness).