Protease genotypes in patients failing protease inhibitor-based antiretroviral therapy at a pediatric center in Botswana

Second-line HIV Treatment in Ugandan Children: Favorable Outcomes and No Protease Inhibitor Resistance

BACKGROUND

Data on pediatric second-line antiretroviral treatment (ART) outcomes are scarce, but essential to evaluate second-line and design third-line regimens.

METHODS

Children ≤12 years switching to second-line ART containing a protease inhibitor (PI) in Uganda were followed for 24 months. Viral load (VL) was determined at switch to second-line and every 6 months thereafter; genotypic resistance testing was done if VL ≥ 1000 cps/ml.

RESULTS

60 children were included in the analysis; all had ≥1 drug resistance mutations at switch. Twelve children (20.0%) experienced treatment failure; no PI mutations were detected. Sub-optimal adherence and underweight were associated with treatment failure.

CONCLUSIONS

No PI mutations occurred in children failing second-line ART, which is reassuring as pediatric third-line is not routinely available in these settings. Poor adherence rather than HIV drug resistance is likely to be the main mechanism for treatment failure and should receive close attention in children on second-line ART.