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BioMed Research International
Volume 2014, Article ID 519787, 9 pages
Research Article

Phylogenetic Analysis of H7N9 Avian Influenza Virus Based on a Novel Mathematical Descriptor

1School of Science, Zhejiang Sci-Tech University, Hangzhou 310018, China
2School of Life Science, Zhejiang Sci-Tech University, Hangzhou 310018, China

Received 28 February 2014; Revised 13 May 2014; Accepted 23 May 2014; Published 16 June 2014

Academic Editor: Tatsuya Akutsu

Copyright © 2014 Yusheng Bai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A new mathematical descriptor was proposed based on 3D graphical representation. Using the method, we construct the phylogenetic trees of nine proteins of H7N9 influenza virus to analyze the originated source of H7N9. The results show that the evolution route of H7N9 avian influenza is from America through Europe to Asia. Furthermore, two samples collected from environment in Nanjing and Zhejiang and one sample collected from chicken are the sources of H7N9 influenza virus that infected human in China.