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Published on: October 6, 2015
The clinical pattern, prevalence, and factors associated with immune reconstitution inflammatory syndrome in Ugandan
Judy Orikiiriza1, Sabrina Bakeera-Kitaka, Victor Musiime
1Department of Pediatrics and Child Health, Makerere University College of Health Sciences and Mulago National Referral Hospital, Uganda. jtatorichdr@yahoo.com
Insights
Pediatric immune reconstitution inflammatory syndrome (IRIS) affects 38% of HIV-infected children in Uganda, often presenting early after antiretroviral therapy (ART) initiation. Key risk factors include low pre-ART CD4 counts and male sex, necessitating increased awareness among healthcare providers and caregivers.
Area of Science:
- Pediatric Infectious Diseases
- Immunology
- Global Health
Background:
- Immune reconstitution inflammatory syndrome (IRIS) is a significant concern in children initiating antiretroviral therapy (ART), particularly in resource-limited settings.
- Understanding the clinical patterns and prevalence of pediatric IRIS is crucial for effective management.
Purpose of the Study:
- To determine the clinical pattern, prevalence, and associated factors of pediatric IRIS in Uganda.
- To identify risk factors for IRIS in HIV-infected children starting ART.
Main Methods:
- A prospective, multicenter cross-sectional study was conducted in Uganda.
- 162 HIV-infected children receiving ART for 0.5-6 months were evaluated for IRIS using a standardized case definition.
Main Results:
- The prevalence of IRIS was 38%, with 77% being unmasking of new opportunistic infections.
- Tuberculosis-IRIS was the most frequent presentation (29%), often occurring within the first month of ART.
- Independent risk factors included low pre-ART CD4(+) cell percentage, high current CD8(+) cell count, male sex, and prolonged cough.
Conclusions:
- IRIS is common in Ugandan children with advanced immunosuppression starting ART, frequently occurring early in treatment.
- Awareness of IRIS among healthcare providers and caregivers is essential to prevent ART nonadherence and improve patient outcomes.
Objective:
To determine clinical pattern, prevalence, and factors associated with pediatric immune reconstitution inflammatory syndrome (IRIS) in Uganda.
Design:
A prospective, multicenter cross-sectional study.
Methods:
We enrolled HIV-infected children receiving antiretroviral therapy (ART) between 0.5 and 6 months duration from December 2006 to October 2007 at three pediatric clinics in Uganda. Children were evaluated for IRIS at a one-time study visit by a standardized pediatric case definition.
Results:
The IRIS prevalence was 38% [95% confidence interval (CI) 31-46] among 162 children (57% female) with a median age of 6 years (interquartile range 2.5-11 years). Of the IRIS events, 77% were unmasking of a new opportunistic infection and 23% were probable paradoxical IRIS events toward prior opportunistic infections. The majority of IRIS events (55%) occurred in the first month of ART. The clinical events were diverse, with tuberculosis-IRIS (29%) being the most frequent presentation. Independent risk factors for IRIS were pre-ART CD4(+) cell percentage below 15% (odds ratio = 3.1, 95% CI 1.2-8.4, P = 0.027), current CD8(+) cell absolute count below 1000 cells/microl (odds ratio = 4.3, 95% CI 1.8-10.4, P = 0.001), male sex (odds ratio = 2.6, 95% CI 1.06-8.4, P = 0.01), and a cough of more than 1 week duration at the current clinic visit (odds ratio = 4.3, 95% CI 1.7-10.7, P = 0.002). A more than 25 CD4(+) T-cells increase at current study visit from the pre-ART baseline was associated with IRIS by univariate (P = 0.005) but not multivariate analysis.
Conclusion:
IRIS events commonly occur early after ART initiation in children with advanced immunosuppression, as commonly seen in resource-limited areas. Both healthcare providers and caregivers of the children need awareness of IRIS to minimize ART nonadherence.
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