Prevalence of primary genotypic resistance in a UK centre: comparison of primary HIV-1 and newly diagnosed treatment-naive individuals

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The worrying finding that up to 19% of newly diagnosed HIV-1 cases in the UK have genotypic evidence of transmitted drug-resistant HIV-1 (TrDR-HIV-1) does not concur with levels observed in one London centre. A study of the prevalence of resistance in primary HIV infection and newly diagnosed antiretroviral-naive individuals demonstrated significantly lower levels of TrDR-HIV-1 than previously reported. Variations in the prevalence of TrDR-HIV-1 may reflect the heterogeneity of methodologies and definitions used for resistance.

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