|Undetectable, yet falling CD-4 count?
May 16, 2004
Dear Doctor, I recently went to my doctor and after finally achieving an undetectable viral load, my T cells have fallen from 170, down to 130. I'm just curious, as he is too, why this has happened. One would think that if you get the viral load down, then eventually, the CD-4 count should rise. Is this normal? My doctor is having me retake my labs in a month. Thanks for any input or opinions you may have. Sincerely, Antonio
Response from Dr. Sherer
For one T cell count to be significantly different than another, it has to exceed the normal variation in the assay, i.e. more than a 15% difference. So your change is barely significant, and I would not put too much weight on it and await the next one.
Another way to assess whether a change in T cell count is important is to look at the CD4 cell percentage. A significant change is > 3%. You might ask your doctor whether there was a fall of >3% in the CD4 percent at the same time that the total count dropped.
There are some people with HIV who have a less than optimal response to ART, even when their virus is suppressed completely, i.e. 5-15%, but it is too early to think that this is your situation. Generally this occurs when people are treated very late in the disease period. It also is more common in people who are heavily treatment experienced. You did not indicate whether this is your first regimen, or a later one.
In the meantime, be sure to take the medications as prescribied and try not to miss any doses. In the majority of cases, you will be rewarded.
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