title: An unusual cluster of HIV-1 B/F recombinants in an Asian population.
abstract: We report the detection of multiple HIV strains in injection drug users (IDU) in Macao, which appear to be derived from subtypes F, G, and CRF12_BF. A total of 14 HIV-infected IDU samples were collected and examined. Direct sequencing was performed to obtain the gag, pol, and env fragments. The subtypes of individual viral sequences were determined using the REGA subtyping tool. The concatenated sequences were aligned with reference sequences retrieved from the Los Alamos National Laboratory HIV database. We found 11 unusual cases in Macao, which showed characteristics of CRF12_BF (n=2) and CRF14_BG (n=8), and one that could not be classified into an existing subtype/CRF, along with three cases of CRF01_AE. Interestingly, the sequences derived from subtypes BG and BF recombinants have not been previously reported in any other Asian cities. Another subtype, CRF14_BG, has also been introduced into Macao among the IDUs. In conclusion, human activity, including travel over long distances and injection drug usage have fueled the spread of HIV and have provided a platform for recombination, which may otherwise have taken years to happen.
authors.affiliation: Hong Kong Bioinformatics Centre, The Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Ross K K
authors.initials: RK
authors.lastname: Leung
authors.forename: Fion N Y
authors.initials: FN
authors.lastname: Fong
authors.forename: Thomas C C
authors.initials: TC
authors.lastname: Au
authors.forename: I Fan
authors.initials: IF
authors.lastname: Lau
authors.forename: Paul K S
authors.initials: PK
authors.lastname: Chan
authors.forename: Chiyu
authors.initials: C
authors.lastname: Zhang
authors.forename: Peng Kei
authors.initials: PK
authors.lastname: Ip
authors.forename: Chong
authors.initials: C
authors.lastname: Lam
authors.forename: Shui Shan
authors.initials: SS
authors.lastname: Lee
authors.forename: Stephen K W
authors.initials: SK
authors.lastname: Tsui
mesh_terms: D016000:Cluster Analysis; D004196:Disease Outbreaks; D015752:Genes, env; D015750:Genes, gag; D015751:Genes, pol; D015658:HIV Infections / Q000150:complications / Q000453:epidemiology* / Q000821:virology*; D015497:HIV-1 / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D008256:Macau / Q000453:epidemiology; D010802:Phylogeny; D011995:Recombination, Genetic; D015819:Substance Abuse, Intravenous / Q000150:complications