HIV Monitoring Panel ( Viral Load & CD Counts )
Also Known As
Test Parameters Included
- HIV-1 RNA Viral Load (Quantitative) PCR, WB-EDTA PLASMA
- Specimen Type: WB-EDTA PLASMA
- Methodology: PCR (Polymerase Chain Reaction)
- Significance: Measures the amount of HIV virus in the blood.
- CD3/CD4/CD8/CD45
- Specimen Type: EDTA / Heparin Whole Blood, BMA
- Methodology: Flow Cytometry (FCM)
- Significance: Measures the number of different types of T-lymphocytes (CD4, CD8) to assess immune system health.
Department
Methodology
Sample Required
Preparation
Schedule Report
24-48 Hours
Emergency Report
Yes
Frequently Asked Questions
What is the difference between Viral Load and CD Count?
The Viral Load measures how much active HIV is in your blood (virologic status), while the CD Count (specifically CD4) measures the strength of your immune system (immunologic status).
Why are both tests necessary?
Both are crucial because the viral load shows if the treatment is working (lowering the virus), and the CD count shows if the immune system is recovering and how vulnerable you are to infections.
What does an 'undetectable' viral load mean?
It means the amount of HIV in the blood is too low for the current test to measure. It is the goal of Antiretroviral Therapy (ART) and indicates that the patient is effectively treated and cannot transmit the virus sexually (U=U: Undetectable = Untransmittable).
Is an undetectable viral load the same as being cured?
No. While the virus is suppressed, it is not completely eradicated from the body's latent reservoirs. A person must continue taking ART to keep the viral load suppressed.
What is a "good" CD4 count?
A CD4 count of 500 cells/mm3 or higher is generally considered good, indicating a strong immune system.
What does a CD4 count below 200 mean?
A count below 200 cells/mm3 means the immune system is severely compromised. This stage is officially classified as AIDS, and prophylaxis against opportunistic infections is often required.
Do I need to fast for this test?
No, generally fasting is not required for the HIV Monitoring Panel.
How often should this panel be done?
The frequency is determined by your doctor, but typically it's done at baseline, then a few weeks after starting/changing ART, and then every 3 to 6 months while on stable treatment.
What is the significance of the CD4:CD8 ratio?
A ratio less than 1.0 is common in HIV. An increasing ratio towards the normal range of >1.0 is a sign of long-term immune recovery.
Can medications other than ART affect the results?
Yes, certain supplements (like high-dose biotin) or chemotherapy can potentially affect the results, so you must inform your doctor about all medications.
What should I do if my Viral Load is rising?
A rising viral load (virologic failure) requires a discussion with your doctor, who may recommend adherence counseling or HIV Genotype Resistance Testing to change the ART regimen.
What is Flow Cytometry used for?
Flow Cytometry is the specific technology used to count the different types of cells, such as the CD4 and CD8 T-lymphocytes, accurately.
How is the sample collected?
A blood sample will be drawn from a vein in your arm by a trained phlebotomist.
Is this test used for initial HIV diagnosis?
No, this test is primarily used for monitoring known HIV infection. Initial diagnosis is typically done with a 4th Generation HIV Ag/Ab screening test, confirmed by a differentiation assay.
Does this panel detect HIV-2?
The Viral Load test in this panel is typically specific for HIV-1 RNA. Separate, specific testing would be required to quantify HIV-2.
Test Description
Test Code
PH8
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