title: Rapid detection and differentiation of antibodies to HIV-1 and HIV-2 using multivalent antigens and magnetic immunochromatography testing.
abstract: A simplified lateral-flow assay for the detection of antibodies to HIV using magnetic-bead conjugates and multibranched peptides from both HIV-1 and HIV-2 was developed. Magnetic immunochromatography testing (MICT) uses a standard lateral-flow platform that incorporates magnetic-bead conjugates for quantitative measurement of the magnetic field distortion associated with the bound magnetic conjugate (reported as adjusted relative magnetic units [MAR]). The results of the optimized MICT assay were compared to standard enzyme immunoassay (EIA) and Western blotting (WB) results using a blinded 649-member panel of specimens from the United States, Cameroon, and West Africa. The panel was comprised of samples from individuals infected with various HIV-1 subtypes (n = 234) or HIV-2 (n = 65) and HIV-seronegative specimens (n = 350). Additionally, 13 HIV-1 seroconversion panels (total specimens = 85), a worldwide panel containing seven of the major circulating HIV-1 subtypes (n = 18), an HIV-2 panel, an HIV-1/HIV-2 mixed panel, and 100 prospective specimens were tested with completely concordant results. Assay reproducibility (observed MAR) for both intra- and interrun testing was excellent, with coefficients of variation of <12%. MICT can provide a rapid, low-cost method of determining HIV antibody status requiring no subjective interpretations.
authors.affiliation: Centers for Disease Control and Prevention, 1600 Clifton Rd. NE, Mailstop A-25, Atlanta, GA 30333, USA. TGranade@cdc.gov
authors.forename: Timothy C
authors.initials: TC
authors.lastname: Granade
authors.forename: Shon
authors.initials: S
authors.lastname: Workman
authors.forename: Susan K
authors.initials: SK
authors.lastname: Wells
authors.forename: Angela N
authors.initials: AN
authors.lastname: Holder
authors.forename: S Michele
authors.initials: SM
authors.lastname: Owen
authors.forename: Chou-Pong
authors.initials: CP
authors.lastname: Pau
mesh_terms: D015492:AIDS Serodiagnosis; D000918:Antibody Specificity; D002845:Chromatography / Q000379:methods; D015483:HIV Antibodies / Q000097:blood*; D015488:HIV Antigens / Q000737:chemistry / Q000276:immunology*; D015658:HIV Infections / Q000175:diagnosis* / Q000276:immunology / Q000821:virology; D015497:HIV-1 / Q000276:immunology*; D015498:HIV-2 / Q000276:immunology*; D018189:Immunomagnetic Separation / Q000379:methods; D010455:Peptides / Q000276:immunology; D013997:Time Factors
chemical_list: D015483:HIV Antibodies; D015488:HIV Antigens; D010455:Peptides
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