In this report, we present the results of double-blinded studies on the use of direct electric current to alter the infectivity o£ HIV-1 for susceptible cells in vitro. Two lymphoblastoid cell lines (H9 and CEM-SS) were exposed to aliquots of the RT strain of HIV-1 treated with direct current. Results of these studies show that virus treated with currents from 50 to 100 microamperes (ìA) has a significantly reduced infectivity for susceptible cells.