Related Experiment Videos
Cytomegalovirus retinitis after immune reconstitution
1HIV Clinic, Department of Internal Medicine, Division of Infectious Diseases, Naval Medical Center, San Diego, California, USA.
The AIDS Reader
|April 23, 2005
Summary
Cytomegalovirus (CMV) retinitis can recur in HIV patients even after immune recovery with high CD4 counts. This highlights that partial immune reconstitution may still allow opportunistic infections like CMV to re-emerge.
Area of Science:
- Ophthalmology
- Infectious Diseases
- Immunology
Background:
- Cytomegalovirus (CMV) retinitis is a common opportunistic infection in HIV patients, typically seen with severe immune suppression (CD4 < 50 cells/µL).
- Highly Active Antiretroviral Therapy (HAART) has reduced the incidence of opportunistic infections in HIV-positive individuals.
Observation:
- A case report details an HIV-infected patient experiencing recurrent CMV retinitis.
- This recurrence occurred despite the patient receiving HAART and achieving apparent immune reconstitution, indicated by a CD4 count > 500 cells/µL.
Findings:
- CMV retinitis can manifest even in HIV patients with seemingly restored immune systems (CD4 counts > 500 cells/µL).
- Recurrent CMV infection suggests that immune reconstitution may be incomplete or insufficient to prevent opportunistic infections in some cases.
Implications:
- Clinicians should maintain a high index of suspicion for CMV retinitis in HIV patients, irrespective of CD4 count, especially if immune reconstitution is partial.
- This case challenges the assumption that high CD4 counts invariably prevent CMV reactivation and necessitates further investigation into immune reconstitution markers.
- Ophthalmological monitoring remains crucial for HIV patients on HAART, even after significant CD4 count recovery.