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- W2012708157 abstract "Objectives: The incidence of HIV-1 dual infections is generally thought to be low, but as dual infections have been associated with accelerated disease progression, its recognition is clinically important. Methods to identify HIV-1 dual infections are time consuming and are not routinely performed. Design: Genotyping of the HIV-1 protease and reverse transcriptase (prot/RT) genes is commonly performed in the western world to detect drug-resistance mutations in clinical isolates. In our hospital, prot/RT baseline sequencing is part of the patient care for all newly infected patients in the Amsterdam region since 2003. We reasoned that degenerate base codes in this sequence could indicate either extensive viral evolution or infection with multiple HIV-1 strains. Methods: We amplified, cloned and sequenced multiple HIV-1 envelope (env)-V3 and gag sequences from patients with 34 or more (range 34–99) degenerate base codes in the ViroSeq genotyping RT sequence (37 out of 1661 available records) to estimate the number of HIV-1 dual infections in this group. Results: Of the 37 patients included in this study, 16 (43.2%, equal to 1% of the 1661 total records) had an HIV-1 dual infection based on phylogenetic analysis of env-V3/gag sequences. If only sequences with 45 or more degenerate base codes were taken into account, 73.3% of patients showed evidence of a dual infection. Conclusion: We describe an additional use of routinely performed HIV-1 genotyping. In patients with a high number of degenerate bases (≥ 34) in RT it is important to consider the possibility of a dual HIV-1 infection." @default.
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- W2012708157 date "2007-04-23" @default.
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- W2012708157 title "Routine HIV-1 genotyping as a tool to identify dual infections" @default.
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- W2012708157 doi "https://doi.org/10.1097/qad.0b013e3280f3c08a" @default.
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