کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3369639 | 1219045 | 2011 | 5 صفحه PDF | دانلود رایگان |
BackgroundHIV-1 Western blot (WB) may be positive in specimens from persons with HIV-2 infection due to cross-reactive antibodies. HIV-1 and HIV-2 infections may be identified using assays designed to differentiate HIV-1 and HIV-2 antibody reactivity.ObjectivesTo evaluate the ability of the current CDC WB criteria, alternative more stringent HIV-1 WB criteria (2 env plus one gag or pol band) and the Multispot HIV-1/HIV-2 Rapid Test to accurately differentiate HIV-1 and HIV-2 infections.Study designTwo panels were used to determine the ability of each method to properly classify HIV-1 and HIV-2 infections: an HIV-2 panel (n = 114) determined to be HIV-2 antibody-positive by both Multispot and by a validated HIV-2 WB, and 2135 HIV-1/HIV-2 immunoassay repeatedly reactive (IA-RR) specimens from the New York State Department of Health Laboratory (NYS).ResultsBy CDC WB criteria, 53 (46.5%) HIV-2 panel specimens were HIV-1 WB positive, 60 (52.6%) were indeterminate, and 1 (0.9%) was negative; the alternative WB criteria re-classified 75.5% of the positives as indeterminate. Among 2135 NYS IA-RR specimens, the alternative WB criteria increased the proportion of indeterminates by 0.8%. Only 6 (0.3%) of the NYS specimens were determined to be HIV-2 infections; all 6 were classified either as HIV-1 positive or indeterminate by both WB criteria, but were classified as HIV-2 (n = 4) or HIV-1/2 undifferentiated (n = 2) by Multispot.ConclusionsThe alternative WB criteria classified most of the HIV-2 specimens that were HIV-1 positive by CDC criteria as indeterminate, but also slightly increased the proportion of HIV-1 specimens classified as indeterminate. The WB indeterminate specimens would require further testing or follow-up to resolve the infection status, whereas Multispot directly distinguished HIV-1 from HIV-2.
Journal: Journal of Clinical Virology - Volume 52, Supplement 1, December 2011, Pages S23–S27