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Infection with Possible Precursor of Avian Influenza A(H7N9) Virus in a Child, China, 2013
Lili Ren<sup>1</sup>, Xuelian Yu<sup>1</sup>, Baihui Zhao<sup>1</sup>, Fan Wu, Qi Jin<sup>2</sup>, Xi Zhang<sup>2</sup>, and Jianwei Wang<sup>2</sup>
Author affiliations: Ministry of Health Key Laboratory for Systems Biology of Pathogens, Beijing, China (L. Ren, Q. Jin, J. Wang); Institute of Pathogen Biology, Beijing (L. Ren, Q. Jin, J. Wang); Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China (X. Yu, B. Zhao, F. Wu, X. Zhang); Shanghai Jiao Tong University, Shanghai (B. Zhao)
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Abstract
During the early stage of the avian influenza A(H7N9) epidemic in China in March 2013, a strain of the virus was identified in a 4-year-old boy with mild influenza symptoms. Phylogenetic analysis indicated that this strain, which has similarity to avian subtype H9N2 viruses, may represent a precursor of more-evolved H7N9 subtypes co-circulating among humans.
Lili Ren<sup>1</sup>, Xuelian Yu<sup>1</sup>, Baihui Zhao<sup>1</sup>, Fan Wu, Qi Jin<sup>2</sup>, Xi Zhang<sup>2</sup>, and Jianwei Wang<sup>2</sup>
Author affiliations: Ministry of Health Key Laboratory for Systems Biology of Pathogens, Beijing, China (L. Ren, Q. Jin, J. Wang); Institute of Pathogen Biology, Beijing (L. Ren, Q. Jin, J. Wang); Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China (X. Yu, B. Zhao, F. Wu, X. Zhang); Shanghai Jiao Tong University, Shanghai (B. Zhao)
Suggested citation for this article
Abstract
During the early stage of the avian influenza A(H7N9) epidemic in China in March 2013, a strain of the virus was identified in a 4-year-old boy with mild influenza symptoms. Phylogenetic analysis indicated that this strain, which has similarity to avian subtype H9N2 viruses, may represent a precursor of more-evolved H7N9 subtypes co-circulating among humans.
