H5N1 Influenza Viruses in Lao People’s Democratic Republic
David A. Boltz*, Bounlom Douangngeun†, Settha Sinthasak†, Phouvong Phommachanh†, Scott Rolston‡, Honglin Chen§¶, Yi Guan§¶, Joseph S. Malik Peiris§¶, Gavin J.D. Smith§¶, and Robert Webster*¶
Author affiliations: *St Jude Children's Research Hospital, Memphis, Tennessee, USA; †National Animal Heath Centre, Vientiane, Lao People's Democratic Republic; ‡Embassy of the United States, Vientiane, Lao People's Democratic Republic; §Shantou University Medical College, Shantou, People's Republic of China; ¶University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
Figure 2. Phylogenetic relationship of the hemagglutinin (HA) gene of representative H5N1 influenza virus strains isolated in Southeast Asia from 2003 through 2006. Analysis was based on nucleotides 1–1012 (1,012 bp) of the HA gene. Viruses isolated in Lao People's Democratic Republic in 2004 and 2006 are underlined. The strain isolated from ducks in Vientiane in February 2006 is shaded.
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