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Cytomegalovirus disease in AIDS: the Edinburgh experience
I Cheong1, P J Flegg, R P Brettle
1Regional Infectious Diseases Unit, City Hospital, Edinburgh, UK.
Insights
Cytomegalovirus (CMV) disease is a late manifestation of Acquired Immunodeficiency Syndrome (AIDS). Frequent eye exams are crucial for HIV patients, especially with low CD4 counts, to detect CMV disease early.
Area of Science:
- Infectious Diseases
- Virology
- Immunology
Background:
- Cytomegalovirus (CMV) is a common opportunistic infection in individuals with Human Immunodeficiency Virus (HIV).
- CMV disease, particularly retinitis, is a significant complication in patients with Acquired Immunodeficiency Syndrome (AIDS).
Purpose of the Study:
- To analyze the clinical characteristics and outcomes of cytomegalovirus (CMV) disease in HIV-positive patients.
- To assess the prevalence and risk factors associated with CMV disease in the context of AIDS progression.
Main Methods:
- Retrospective analysis of medical records from 557 HIV-positive patients, including 113 with AIDS.
- Identification of 17 patients diagnosed with antemortem CMV disease.
- Review of clinical data, including demographics, diagnostic findings, CD4+ lymphocyte counts, and treatment outcomes.
Main Results:
- CMV disease occurred in 17 patients (113 with AIDS), predominantly in homosexual men and injection drug users.
- All patients presented with retinitis; 6 had additional extraocular disease.
- CMV disease was an AIDS-defining diagnosis in 2 patients, with increasing prevalence over time and a 3-year CMV-free survival of 57%.
- Mean CD4+ counts were significantly lower at CMV diagnosis (17 cells/mm3) compared to AIDS diagnosis (68 cells/mm3).
- Therapy was often complicated by marrow suppression, with relapse in 11 patients.
- Mean survival after CMV diagnosis was 10.5 months, with only 3 deaths from severe visual impairment.
Conclusions:
- CMV disease is typically a late manifestation of AIDS, with increased risk correlating with longer survival.
- Frequent fundoscopy is essential for early detection of CMV retinitis in HIV-positive individuals, especially those with CD4+ counts below 100 cells/mm3.
- Despite treatment challenges and relapses, visual outcomes can be favorable with timely diagnosis and management.
Abstract:
Retrospective analysis of medical records of 557 HIV positive patients (including 113 with AIDS) revealed 17 patients with an antemortem clinical diagnosis of cytomegalovirus (CMV) disease. This group comprised 7 injection drug users (2 male and 5 female) and 10 homosexual men. Males were significantly older than females, and homosexual men were significantly older than drug users at the time of diagnosis of CMV. All 17 patients had evidence of retinitis, and 6 also had evidence of extraocular disease. CMV retinitis was the AIDS defining diagnosis in two patients, and the attack rate of CMV in all AIDS patients progressively increased with time, with a 3-year CMV-free survival of 57%. Fifteen patients with CMV disease had evidence of previous CMV infection (CMV IgG positive), with 7 also having a positive CMV IgM and 10 a positive viral culture. The mean CD4+ lymphocyte count at diagnosis of CMV was 17 cells/mm3, compared with 68 cells/mm3 at diagnosis of AIDS. Therapy was unsatisfactory, often being complicated by marrow suppression. Relapse occurred in 11 patients after initial improvement but despite this only 3 patients died with severe visual impairment. The mean survival after a diagnosis of CMV was 10.5 months. This study confirms that disease caused by CMV is usually a late manifestation of AIDS, and the increasing prevalence among patients with AIDS implies that, the longer the survival, the greater the risk of disease. Frequent fundoscopy in HIV positive patients is of paramount importance particularly in patients who have a CD4+ lymphocyte count of less than 100 cells/mm3.