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J. Virol., 10 1997, 7990-7995, Vol 71, No. 10
Copyright © 1997, American Society for Microbiology

Human immunodeficiency virus type 1 intersubtype (B/E) recombination in a superinfected chimpanzee

PN Fultz, L Yue, Q Wei and M Girard
Department of Microbiology, University of Alabama School of Medicine, Birmingham 35294, USA.

Genetic characterization of a large number of human immunodeficiency virus type 1 (HIV-1) isolates indicates that at least 10% of all strains have mosaic genomes generated by recombination between viruses of the same or different subtypes or clades. What is not known, however, is the time between infection with the first and second HIV-1 strains as well as the time between infection with the second strain and the recombinational event. After 32 months of infection with HIV- 1(LAI(IIIB)), a chimpanzee was inoculated intravenously and became infected with a subtype E strain, HIV-1(90CR402). With PCR amplification, DNA heteroduplex analysis, and DNA sequencing, both parental strains and two distinct recombinant proviruses were found in genomic DNA from lymph node tissue obtained 24 weeks after exposure to HIV-1(90CR402). These results show (i) that antiviral immune responses established by long-term infection with an HIV-1 subtype B strain did not prevent infection by a subtype E strain and (ii) that both strains actively replicated and produced sufficient quantities of virus to coinfect the same cell(s), resulting in recombinant viruses.


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