High prevalence of antibodies to acquired immune deficiency syndrome (AIDS)-associated retrovirus (ARV) in AIDS and related conditions but not in other disease states.

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Abstract
A rapid, sensitive indirect immunofluorescence assay has been developed for detection of antibodies to the acquired immune deficiency syndrome (AIDS)-associated retrovirus (ARV). The human T-cell line HUT-78 was chronically infected with ARV-2 and used to detect antibodies to virus-specific cytoplasmic antigens. Because the helper T-cell marker Leu-3 is substantially reduced in this cell line after ARV infection, it appears to be an important receptor for virus infection. Nearly all patients with AIDS and most cases with related conditions showed antibodies against ARV. Some healthy individuals in risk groups for developing AIDS also had antibodies to the agent. In contrast, no antibodies to the virus were found in any individuals outside the risk groups for developing AIDS or with diseases other than those associated with AIDS. The titers of antibodies to ARV and to Epstein-Barr virus varied independently from each other. The level of anti-ARV antibodies in a patient's serum was found to reflect the severity of the disease; it was lower in individuals with more severe manifestations. Taken together, these data support the role of ARV in AIDS and its related disorders.