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Viral Load Test Versus Elisa Antibody Test

Here's a taste of what has to offer on this topic:
Get the Facts
San Francisco AIDS Foundation

HIV Testing

...for your state's aids hotline, go to and click on Other AIDS Hotlines. Some individuals, perhaps wanting results without waiting for the window period, may be curious about a PCR or other types of viral load (RNA) testing (testing directly for the virus itself). Viral load testing is generally used to allow physicians to track with great accuracy the progression of HIV in the body -- thus helping HIV-infected...
Ask the Experts

ELISA/EIA & WB result for post-ARV patients with undetectable viral load

Dear Dr. Bob,I have been under ARV therapy for 3 years and have been able to keep my viral load in the undetectable range with CD4/CD8 in the 20-25% range. If I were to go under the current HIV antibody tests under ELISAEIA & WB now, would the...
Robert J. Frascino, M.D.

Response from Robert J. Frascino, M.D.

The Robert James Frascino AIDS Foundation
...chain reaction (PCR) assays are used to detect pieces of the virus itself. PCR RNA, for example, is used to monitor HIV plasma viral load. If an HIV-positive person is on effective potent antiretroviral drugs, the medications could drive the HIV... Read more »

Viral load in relation to antibodies

Will an HIV positive person with a viral load of undectectable/less than 50 and a cd4 count of 640 test negative or positive to an hiv elisa test or hiv antibody test
Eric Daar, M.D.

Response from Eric Daar, M.D.

UCLA School of Medicine
...With few exceptions, most people who are infected by HIV, regardless of whether their viral load is detectable or CD4 cells are high or low will continue to have a positive HIV antibody test.Best,Eric Read more »

viral load measurement

If there are many different stains of HIV, how do they measure the viral load? Do they test for all the different strains?Mine is "undetectable", but how do I know they are testing for the strain that I have?
Renslow Sherer, M.D.

Response from Renslow Sherer, M.D.

University of Chicago Hospitals
...The viral load assays that are commonly used in the US at present do measure RNA from both B clade - the most common in North America - and Read more »

antibodies drop with viral load?

I understand that people with undetectable viral loads will still have enough antibodies in their blood to have a positive ELISA result. My question is actually: Does the antibody level drop in the same rate as the viral load when on meds, or does...
Mark Holodniy, M.D., F.A.C.P., C.I.C.

Response from Mark Holodniy, M.D., F.A.C.P., C.I.C.

Stanford University, School of Medicine
...HIV antibodies are still detectable after starting treatment and with undetectable viral loads. Read more »
San Francisco AIDS Foundation

Viral Load Testing

...directly . Why is indirect or direct measurement important? Because the same sample, tested with both tests, will give different viral load measurements. Here's another way to think of the differences between these two tests: One way to describe... Read more »
New York State Department of Health AIDS Institute

Diagnostic, Monitoring and Resistance Laboratory Tests for HIV

...Polymerase Chain Reaction (DNA-PCR) 2. Plasma HIV RNA Assays III. Monitoring Tests A. Lymphocyte Analysis B. Viral Load Assays 1. Roche Amplicor HIV-1 Monitor and Roche Amplicor HIV-1 Monitor Ultrasensitive (RT-PCR) 2.... Read more »
AIDS InfoNet

HIV Testing

...already know they are infected with HIV they might get other "HIV" tests. These measure how quickly the virus is multiplying (a viral load test, see Fact Sheet 125 ) or the strength of your immune system (a CD4 count, see Fact Sheet 124 ). ... Read more »
AIDS InfoNet

Viral Load Tests

... What Is Viral Load? How Is the Test Used? How Are Changes in Viral Load Measured? Viral Load "Blips" What Do the Numbers Mean? Are There Read more »
Connect With Others

4th Generation HIV Test

Posted by Trophy
...years ago. Identification and interventions in high incidence populations may assist in decreasing transmission, since high viral loads which occur during early infection are associated with increased transmission. Monitoring areas of high... Read more »

p24, viral load, dna, and antibody test

Posted by Anonymous, 2 Replies
...Does anyone know where I can get a combination p24, viral load, dna and antibody test done? Read more »

HIV Tests/Undetectable

Posted by Anonymous, 2 Replies
I have a question.... Given a person who tests hiv-neg versus another person who has tested hiv-pos in the past and is on drug therapy to the point that his/her hiv levels are described as "undetectable" who is to say that the first person who tests... Read more »


Posted by bura, 2 Replies
..."The test can be used for diagnosis, because it can detect a viral load a few days after HIV infection. This is better than the standard HIV (antibody) test, which can be "negative" for 2 to 6 months Read more »