Alteration of CD4⁺ and CD8⁺populations in HAM/TSP in vitro.

CD4⁺ and CD8⁺ subsets from 5 patients with HAM/TSP are graphed as a percentage of gated cells (see text for details). Ratio of CD4⁺ cells to CD8⁺ cells decreased in all 5 patients over 6 days in culture.