The CD4 count test measures the number of CD4 T-lymphocytes in the blood. These white blood cells are essential for the immune system, helping the body fight infections. The test is mainly used to monitor HIV/AIDS progression and assess immune system strength.
Why is the CD4 Count Test Important?
🔹 Monitors HIV progression – A falling CD4 count indicates a weakening immune system.
🔹 Assesses treatment effectiveness – Helps determine if antiretroviral therapy (ART) is working.
🔹 Identifies risk of infections – Low CD4 counts increase vulnerability to opportunistic infections.
🔹 Guides treatment decisions – Helps doctors determine when to start preventive medications.
CD4 Count Levels & Their Meaning
✔ 500 – 1,500 cells/mm³ – Normal immune function.
✔ 200 – 499 cells/mm³ – Weakened immune system; increased risk of infections.
✔ Below 200 cells/mm³ – High risk of severe infections; classified as AIDS.
Factors That Affect CD4 Count
🔹 HIV infection stage – The longer HIV is untreated, the lower the CD4 count.
🔹 Antiretroviral therapy (ART) – Effective ART can increase CD4 levels.
🔹 Other infections – Illnesses like tuberculosis or pneumonia can temporarily lower CD4 levels.
🔹 Stress & poor nutrition – Chronic stress and malnutrition can impact immune health.
CD4 Count Test
