title: Primary infection of a male plasma donor with divergent HIV variants from the same source followed by rapid fluctuations in their relative frequency and viral recombination.
abstract: The replication of two HIV-1 variants (>4.0% divergent in the env gene) was observed during primary infection of a frequent plasma donor. Phylogenetic analysis indicated that both HIV-1 variants likely originated from the same source. Heteroduplex tracking analysis of the env V3-V5 region indicated that one of these variant emerged in the plasma at the time of seroconversion, 15 days after the initial detection of HIV-1 RNA. Sequencing of the entire protein-coding region of plasma viruses from Days 2, 22, and 31 showed possible regions of recombination in the pol locus occurring within the first month of infection. The very rapid fluctuations of HIV-1 variant frequencies and their recombination during primary infection may reflect changes in their relative fitness in the face of developing immunological responses.
authors.affiliation: Department of Medicine, University of California, San Francisco, California 94118, USA.
authors.forename: Flavien
authors.initials: F
authors.lastname: Bernardin
authors.forename: Belinda L
authors.initials: BL
authors.lastname: Herring
authors.forename: Lorraine
authors.initials: L
authors.lastname: Peddada
authors.forename: Eric L
authors.initials: EL
authors.lastname: Delwart
mesh_terms: D000328:Adult; D001782:Blood Donors; D014644:Genetic Variation; D016679:Genome, Viral; D015658:HIV Infections / Q000821:virology*; D015497:HIV-1 / Q000145:classification* / Q000235:genetics; D020180:Heteroduplex Analysis; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D017422:Sequence Analysis, DNA