Recombination Resulting in Virulence Shift in Avian Influenza Outbreak, Chile
David L. Suarez*
, Dennis A. Senne†, Jill Banks‡, Ian H. Brown‡, Steve C. Essen‡, Chang-Won Lee*
, Ruth J. Manvell‡, Christian Mathieu-Benson§, Valentine Moreno§, Janice C. Pedersen†, Brundaban Panigrahy†, Herman Rojas§, Eric Spackman*, and Dennis J. Alexander‡
Author affiliations: *Southeast Poultry Research Laboratory, Athens, Georgia, USA; †National Veterinary Services Laboratories, Ames, Iowa, USA; ‡Veterinary Laboratories Agency–Weybridge, New Haw, Addlestone, Surrey, United Kingdom; §Ministerio de Agricultura, Santiago, Chile
Figure 3. Unrooted phylograms of partial nucleotide sequences of the PB2 and NS genes of selected influenza A viruses including those from poultry in Chile in 2002 (indicated in boxes). Nucleotides 14–188 of PB2and 50–481 of NS were used for the analyses. The lengths of the horizontal lines are proportional to the number of nucleotide differences.
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