Evaluation of a rapid and simple fourth-generation HIV screening assay for qualitative detection of HIV p24 antigen and/or antibodies to HIV-1 and HIV-2

J Virol Methods. 2010 Sep;168(1-2):218-22. doi: 10.1016/j.jviromet.2010.06.002. Epub 2010 Jun 16.

Abstract

The performance was assessed of a new, rapid, visual and qualitative immunoassay for the detection of HIV p24 antigen (Ag) and antibodies (Ab) to HIV-1 and HIV-2. Characterised serum or plasma specimens from patients diagnosed with HIV infection were tested: 179 samples of known Ab-positive patients harbouring different subtypes of HIV-1 (n=154) and HIV-2 (n=25) and 200 samples from individuals not infected with HIV. The assay's Ag sensitivity was assessed by testing HIV seroconversion panels (n=10) and primary HIV infection specimens (n=57). In addition, the influence of the genetic variability of HIV-1 on Ag detection was evaluated using dilutions of culture supernatants infected with different subtypes (n=50). The performance of the rapid test was compared to a "gold standard" testing algorithm with the use of a single Ag ELISA and with the Vironostika((R)) HIV Uni-Form II Ag/Ab test, a fourth-generation ELISA. The new assay, the Determine HIV-1/2 Combo demonstrated 100% (98.2-100.0) Ab specificity (200/200) and 100% (98.0-100.0) Ab sensitivity (179/179). In these samples, the observed Ag sensitivity was 86.6% (58/67) with the Determine HIV-1/2 Combo test and 92.5% (62/67) with the Vironostika compared to the reference single Ag ELISA. The assay could not detect Ag in one group O, one subtype F and two subtype H cell supernatant isolates. None of the HIV-2 Ag could be detected.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Genetic Variation
  • HIV Antibodies / blood*
  • HIV Core Protein p24 / blood*
  • HIV Infections / diagnosis*
  • HIV-1 / immunology
  • HIV-1 / isolation & purification*
  • HIV-2 / immunology
  • HIV-2 / isolation & purification*
  • Humans
  • Immunoassay / methods
  • Mass Screening / methods*
  • Sensitivity and Specificity
  • Time Factors
  • Virology / methods*

Substances

  • HIV Antibodies
  • HIV Core Protein p24