Three cohorts of HIV-infected adults aged 18 years were enrolled : 94 ART recipients with a CD4 ( + ) T-cell count of 200 cells/mm ( 3 ) , 14 ART recipients with a CD4 ( + ) T-cell count of 50-199 cells/mm ( 3 ) , and 15 ART-naive adults with a CD4 ( + ) T-cell count of 500 cells/mm ( 3 ) .