Hiv genome in peripheral blood mononuclear cells of seronegative regular sexual partners of hiv‐infected subjects

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Abstract
We have investigated the presence of the human immunodeficiency virus (HIV) by using in situ hybridization on peripheral blood mononuclear cells (PBMCs) from seronegative regular sexual partners of HIV‐infected subjects. The cells were hybridized with a 9 kilobase (kb) Sstl‐Sstl lambda BH 10 probe, which was able to recognize both viral mRNA and proviral cDNA. Labeling was done by chemical insertion of an antigenic sulfone group in cytosine moieties and was visualized by a double‐antibody immunohistochemical reaction. In all the subjects studied, the HIV genome was present. The HIV infected cells showed morphological aspects consistent with that of lymphocytes and monocytes. Our data suggest that the anti‐HIV seronegative individuals who are regular sexual partners of HIV‐infected subjects may be HIV‐infected.