To detect HIV-1 plasma viral load in seropositive patients, we applied
a new molecular quantitation technique: branched DNA signal amplifica
tion (bDNA). We performed bDNA with 99 sera from HIV-1 seropositive pa
tients undergoing antiretroviral therapy. We compared the results obta
ined with p24 antigenemia and CD4+ cell count. The bDNA proved quite s
ensitive and available for routine use in laboratories.