CMV PCR predicts the development of CMV disease and can be used to target ophthalmological resources to those patients at highest risk of retinitis. Asymptomatic patients who are PCR-positive represent a high-risk group in whom controlled trials of pre-emptive therapy could be conducted.
The introduction of HAART has had a major impact on the natural history of CMV retinitis with improved survival time and decreased risk of progression following diagnosis. However, immune reconstitution may be associated with inflammatory complications which can result in significant visual loss in the absence of active CMV disease.
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