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Comparison: Imported and Indigenous HIV Fourth-generation immunodiagnostic kits.

Rajesh Kumar Sharma1, Bharti Chauhan1, Ashrat Manzoor1

  • 1Immunodiagnostic Kit Laboratory, National Institute of Biologicals, Noida, Uttar Pradesh, India.

Asian Journal of Transfusion Science
|January 17, 2025
PubMed
Summary

Early detection of HIV is crucial. Fourth-generation HIV test kits, detecting p24 antigen, show significant variation in sensitivity and reporting units between imported and indigenous assays.

Keywords:
Detection concentrationHIVp24 antigen

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Area of Science:

  • Immunodiagnostics
  • Infectious Disease Diagnostics

Background:

  • Early HIV detection significantly improves patient outcomes.
  • Fourth-generation HIV test kits combine antibody and p24 antigen detection for earlier diagnosis.
  • Variability in assay performance and reporting units can impact clinical interpretation.

Purpose of the Study:

  • To compare the detection capabilities and reporting units of various HIV fourth-generation immunodiagnostic kits.
  • To assess the performance of imported versus indigenous HIV testing kits.
  • To provide insights for the In Vitro Diagnostics (IVD) market, particularly for 'Make in India' initiatives.

Main Methods:

  • Evaluation of 30 different HIV fourth-generation assays.
  • Analysis of manufacturer-assigned detection concentrations.
  • Comparison of detection ranges and units (IU/mL, pg/mL).

Main Results:

  • Imported kits had detection concentrations ranging from 0.48 IU/mL to 2 IU/mL.
  • Indigenous kits exhibited a broader detection range, from 25 pg/mL to 1000 IU/mL.
  • Significant variability was observed in the sensitivity and units used by different HIV test kits.

Conclusions:

  • There is substantial heterogeneity in the performance and reporting standards of HIV fourth-generation kits.
  • Understanding these variations is critical for accurate HIV diagnosis and clinical decision-making.
  • The findings highlight opportunities for indigenous IVD manufacturers in the competitive global market.