Purpose: Eighty-six post-mortems of AIDS patients were reviewed microscopically and the presence of cytomegalovirus (CMV) infection in the viscera, brain and eye was recorded.
Methods: Immunohistochemical stains and in situ hybridisation with a CMV probe were performed.
Results and conclusion: CMV infection was observed in 63% of the cases. Visceral, cerebral and ocular involvement were overall 49%, 33% and 29%, respectively. The visceral form with no concomitant ocular and/or cerebral infection was the main cause of death (31%) in the 54 CMV-infected patients. Although CMV retinitis occurred mostly (20%) as a component of systemic disease, in 13% of the CMV-infected patients the eyes only were involved, while there were no cases with CMV limited to the brain. In the absence of systemic involvement, 9% of the cases showed concomitant ocular and cerebral infection, but because we failed to observe CMV optic neuritis without ocular involvement, retrograde viral spread from the brain through the optic nerve appears to be an infrequent mechanism of CMV retinitis.