Paraffin sections of retinal tissue from five patients who died from the acquired immune deficiency syndrome (AIDS) and retin opathy were examined by in situ hybridisation experiments with deoxyribonucleic acid (DNA) labelled with sulphur-35 of lenti-virus, human T lymphotropic virus type III/lymphadenopathy associated virus (HTLV-III/LAV), and cytomegalovirus. HTLV-III/LAV ribonucleic acid (RNA) was not detected in any of the tissue sections. Cytomegalovirus RNA was identified, however, in three of the five patients. Retinopathy induced by cytomegalovirus may thus be one of the many syndromes potentiated by the immunosuppression caused by HTLV-III/LAV.
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