Patients must fulfill the CDC criteria for the diagnosis of AIDS. In addition, patients must have a typical clinical picture of cytomegalovirus (CMV) retinitis, a positive CMV culture from any site, and no other possible explanation for the retinal findings (e.g., toxoplasmosis infection). Patients with AIDS in whom CMV retinitis is suspected will be examined by an ophthalmologist and, if, retinal lesions are seen, shall have a complete set of retinal photographs taken. CMV cultures of throat, buffy coat, urine, and if possible, semen will be obtained.