Abstract
Optimal conditions for demonstrating the presence of infectious human immunodeficiency virus in peripheral blood mononuclear cells (PMCs) from seropositive individuals involved cocultivation of infected cells with phytohemagglutinin-stimulated PMCs from seronegative donors in the presence of 2 micrograms of Polybrene per ml. The size of the culture vessel also influenced the results; smaller numbers of infected cells were detected under conditions of increased cell density. In addition, an increased normal donor/patient PMC ratio was helpful. The cocultivation approach permitted identification of human immunodeficiency virus in over 90% of seropositive individuals with different clinical conditions. Moreover, reconstruction experiments indicated that this method allows detection of one productively infected CD4+ cell in a population of over 10(6) PMCs.
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