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. 2019 Jan;25(1):161–165. doi: 10.3201/eid2501.171878

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This is a publication of the U.S. Government. This publication is in the public domain and is therefore without copyright. All text from this work may be reprinted freely. Use of these materials should be properly cited.

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Maximum-likelihood phylogenetic tree of hemagglutinin genomic segment of H3N2 canine influenza viruses (CIVs). The phylogeny of 97 H3N2 CIVs available in public databases and the 8 hemagglutinin genomic segments sequenced in this study were inferred by using MEGA version 6 (https://www.megasoftware.net/) under the general time-reversible plus gamma distribution model with 1,000 bootstrap replicates. Avian isolates of ancestral strain (triangles) and canine isolates from South Korea (squares), Thailand (diamond), and the United States (circles) are indicated. Shading indicates isolates sequenced in this study. Scale bar indicates substitutions per nucleotide.