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Pooled HIV-1 RNA Viral Load Testing for Detection of Antiretroviral Treatment Failure in Kenyan children
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Details:
  • Pubmed ID:
    23542638
  • Pubmed Central ID:
    PMC3767042
  • Description:
    Background

    Pooled viral load (VL) testing with two different testing strategies was evaluated as a potential cost-saving method to monitor antiretroviral therapy (ART) in HIV-infected children receiving ART in a resource-limited setting.

    Methods

    Archived samples collected from 250 HIV-1 infected children on first-line ART at various time-points post-ART initiation were evaluated for pooled VL testing using a minipool+algorithm strategy. Additionally, samples collected in real-time from 125 children on ART were assessed for virologic failure using a minipool strategy for pooled viral load testing. Virologic failure was determined as HIV-1 RNA viral loads >1500 copies/ml.

    Results

    Minipool+algorithm strategy for pooled VL testing of archived samples had estimated viral failure of 13.6%, with a relative efficiency (RE) of 23.6% (95% CI; 18.5, 29.4), and negative predictive value (NPV) of 88%. This testing strategy would have resulted in 24% fewer assays needed, for a cost savings of $1,180 per 100 samples. The minipool strategy for pooled viral load testing of samples obtained in real-time yielded an estimated 23.2% of samples with viral failure and a RE of 8.0 % (95% CI; 3.9, 14.2); however had a minipool+algorithm pooling strategy been used the RE would increase to 20%.

    Conclusions

    The minipool+algorithm strategy for pooled VL testing to detect virologic failure in HIV-1 infected children on ART was determined to be relatively efficient in detecting virologic failure, had high NPV, with substantial cost savings. Pooling strategies may be important components of cost-effect strategies to reduce rates of viral failure and resistance, thus improving clinical outcomes.

  • Document Type:
  • Collection(s):
  • Funding:
    3R01 TW007632-05S1/TW/FIC NIH HHS/United States
    5U2GPS002182 CDC 2010-2011/PHS HHS/United States
    CCU 024513 CDC 2004-2010/PHS HHS/United States
    P30 AI027757/AI/NIAID NIH HHS/United States
    R01 D43-TW000007/TW/FIC NIH HHS/United States
    R01 TW007632/TW/FIC NIH HHS/United States
    R01 TW007632/TW/FIC NIH HHS/United States
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