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Mpled sequences are likely CRF02_AG (accounting for 50 of HIV-1M infections), with the other "pure" subtypes (G, D, A, and F) and CRFs (CRF11_cpx, 36_cpx, 37_cpx, and CRF01_AE) accounting for the remainder of infections. CRF02_AG and clade G viruses are broadly distributed across west central Africa and have apparently been circulating stably there for many years [3,17-19], consistent with the pr
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Ormation were obtained. RNA was extracted from plasma samples, reverse transcribed and PCR amplified as described previously [12] using subtype non-specific HIV-1 primers for HIV-1 full length gag [12] and nef [13] genes, and sequenced. Sequenced fragments were assembled using ChromasPro. Full length gag and nef sequences were generated and aligned using MUSCLE with manual editing in MEGA5, togeth
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Es represent the gag sequences sampled from Cameroon in this study, while red squares represent intragene recombinant fragments in our samples. The blue squares show the new divergent branches formed by viruses sampled in this study. Sequence C.ZM.2006.ZM1464F appears to have been mis-labelled in the LANL database, and consistently groups with subtype A1. Additional file 2: Detailed phylogenetic a
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One of the newly sequenced gag genes (BS72) was apparently derived through recombination between F2 and CRF36_cpx parental viruses, one of the nef genes was apparently derived through recombination between F and CRF22_01A1 parental viruses. The phylogenetic analysis of gag sequences derived from the Cameroonian samples further revealed four sequences (BS09, BS25, BS16 and BS42) situated on diverge
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Are unaffected by the virus. There are yet questions unanswered and the virus continues to spread unabated. However these immune components are several key elements attractive targets for study that hopefully can advance the field of research.12.13. 14. 15. 16.Competing interestsThe author declares that they have no competing interests.Authors' informationsDavid Gentry Nielsen was born 27, Septemb
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Es represent the gag sequences sampled from Cameroon in this study, while red squares represent intragene recombinant fragments in our samples. The blue squares show the new divergent branches formed by viruses sampled in this study. Sequence C.ZM.2006.ZM1464F appears to have been mis-labelled in the LANL database, and consistently groups with subtype A1. Additional file 2: Detailed phylogenetic a
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Ck squares at the end of the branches represent the nef sequences sampled from Cameroon in this study, while red squares represent intragene recombinant fragments in our samples. Abbreviations HIV: Human Immunodeficiency Virus; CRF: Circulating recombinant form; URF: Unique recombinant form; RNA: Ribonucleic acid; PCR: Polymerase Chain Reaction. Competing interests The authors declare that they ha
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S clustered within the CRF02_AG clade, reinforcing the notion that this viral clade is a major contributor of genetic material to new recombinants [20]; an alternative explanation, however, could be that the gag and nef genes were amplified from different viruses co-infecting the same patients. Ongoing molecular and clinical surveillance will reveal whether new recombinants will begin to circulate