Detection of SARS-CoV-2 intra-host recombination during superinfection with Alpha and Epsilon variants in New York City

在纽约市 SARS-CoV-2 与 Alpha 和 Epsilon 变体重叠感染期间检测到宿主内重组

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作者:Joel O Wertheim #, Jade C Wang #, Mindy Leelawong, Darren P Martin, Jennifer L Havens, Moinuddin A Chowdhury, Jonathan E Pekar, Helly Amin, Anthony Arroyo, Gordon A Awandare, Hoi Yan Chow, Edimarlyn Gonzalez, Elizabeth Luoma, Collins M Morang'a, Anton Nekrutenko, Stephen D Shank, Stefan Silver, Pete

Abstract

Recombination is an evolutionary process by which many pathogens generate diversity and acquire novel functions. Although a common occurrence during coronavirus replication, detection of recombination is only feasible when genetically distinct viruses contemporaneously infect the same host. Here, we identify an instance of SARS-CoV-2 superinfection, whereby an individual was infected with two distinct viral variants: Alpha (B.1.1.7) and Epsilon (B.1.429). This superinfection was first noted when an Alpha genome sequence failed to exhibit the classic S gene target failure behavior used to track this variant. Full genome sequencing from four independent extracts reveals that Alpha variant alleles comprise around 75% of the genomes, whereas the Epsilon variant alleles comprise around 20% of the sample. Further investigation reveals the presence of numerous recombinant haplotypes spanning the genome, specifically in the spike, nucleocapsid, and ORF 8 coding regions. These findings support the potential for recombination to reshape SARS-CoV-2 genetic diversity.

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