Description
Why It’s Done:
This test is performed to:
• Monitor HIV infection and determine disease progression by assessing the immune system’s status.
• Evaluate response to antiretroviral therapy (ART) in HIV-positive patients.
• Detect immune suppression or dysfunction in other conditions such as:
o Primary immunodeficiencies
o Autoimmune diseases
o Certain cancers (e.g., lymphomas)
o After organ or bone marrow transplantation
• Investigate chronic infections or recurrent illness where immune dysfunction is suspected.
A low CD4 count, high CD8 count, or abnormal CD4/CD8 ratio can indicate a compromised immune system.
Preparation:
• No fasting or special dietary restrictions are required.
• Inform your healthcare provider of:
o Any medications being taken, especially immunosuppressants, steroids, or chemotherapy drugs.
o Recent infections, vaccinations, or medical procedures, which may affect results.
• A blood sample is collected from a vein in your arm for analysis via flow cytometry.
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