Circulation of Reassortant Influenza A(H7N9) Viruses in Poultry and Humans, Guangdong Province, China, 2013
Changwen Ke, Jing Lu, Jie Wu, Dawei Guan, Lirong Zou, Tie Song, Lina Yi, Xianqiao Zeng, Lijun Liang, Hanzhong Ni, Min Kang, Xin Zhang, Haojie Zhong, Jianfeng He, Jinyan Lin, Derek Smith, David Burke, Ron A.M. Fouchier, Marion Koopmans, and Yonghui Zhang
Author affiliations: Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (C. Ke, J. Lu, J. Wu, D. Guan, L. Zou, T. Song, L. Yi, X. Zeng, L. Liang, H. Ni, M. Kang, X. Zhang, H. Zhong, J. He, J. Lin, Y. Zhang); University of Cambridge, Cambridge, UK (D. Smith, D. Burke); Erasmus MC, Rotterdam, the Netherlands (R.A.M. Fouchier, M. Koopmans); National Institute of Public Health and the Environment, Bilthoven, the Netherlands (M. Koopmans)
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Figure 2
Figure 2. Timed phylogenies of internal gene segments of influenza A(H7N9) viruses detected in 16 patients from Guangdong Province, China, 2008–2014. A) Polymerase basic 2; B) polymerase basic 1; C) polymerase acidic; D) nucleoprotein; E) matrix; F) nonstructural. Avian H9N2 viruses are shown in green, avian H9N2 viruses from Guangdong Province in blue, human H7N9 sequences from Guangdong Province in pink, and human H7N9 sequences from the main case cluster in 2013 in eastern China in red. Blue boxes indicate clusters of patient sequences on separate branches; numbers correspond with the reassortant numbers listed in Table 2, where 0 indicates original genes from the 2013 cluster of influenza A(H7N9). Individual trees are shown in the Technical Appendix.
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