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Novel Influenza A(H7N2) Virus in Chickens, Jilin Province, China, 2014 - Volume 20, Number 10—October 2014 - Emerging Infectious Disease journal - CDC

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Novel Influenza A(H7N2) Virus in Chickens, Jilin Province, China, 2014 - Volume 20, Number 10—October 2014 - Emerging Infectious Disease journal - CDC


Volume 20, Number 10—October 2014


Novel Influenza A(H7N2) Virus in Chickens, Jilin Province, China, 2014

Jianzhong Shi, Guohua Deng, Xianying Zeng, Huihui Kong, Xiaoyu Wang, Kunpeng Lu, Xiurong Wang, Guodong Mu, Xiaolong Xu, Pengfei Cui, Hongmei Bao, Guobin Tian, and Hualan ChenComments to Author 
Author affiliations: State Key Laboratory of Veterinary Biotechnology–Harbin Veterinary Research Institute, Harbin, China (J. Shi, G. Deng, X. Zeng, H. Kong, K. Lu, X. Wang, X. Xu, P. Cui, H. Bao, G. Tian, H. Chen)Jilin Province Center for Animal Disease Control and Prevention, Changchun, China (X. Wang, G. Mu)


In February 2014, while investigating the source of a human infection with influenza A(H7N9) virus in northern China, we isolated subtypes H7N2 and H9N2 viruses from chickens on the patient’s farm. Sequence analysis revealed that the H7N2 virus is a novel reassortant of H7N9 and H9N2 viruses. Continued surveillance is needed.
Influenza subtype H7 viruses have been detected in poultry worldwide; associated human disease ranges from mild to severe (18). Human infections with influenza A(H7N9) viruses were first identified in China in March 2013 (9). As of March 11, 2014, a total of 375 laboratory-confirmed cases of human infection with influenza A(H7N9) virus, including 115 deaths, had been reported to the World Health Organization (10).
On February 21, 2014, the National Health and Family Planning Commission of China notified the World Health Organization of a laboratory-confirmed case of human infection with influenza virus subtype H7N9 (11). The patient was a 50-year-old farmer who lived in Jilin Province and traded chickens for a living. He became ill on February 15 and was confirmed to be infected with H7N9 virus on February 21. He recovered 2 weeks later. Although H7N9 viruses had been detected in live poultry markets in 12 provinces in China (12,13), the virus had not been detected in Jilin Province, in poultry or humans. To locate the origin of the infection, we conducted influenza virus surveillance among poultry in the patient’s village.

Dr Shi is a veterinary epidemiologist at the Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, China. His research focuses on the surveillance, diagnostic, and molecular epidemiology of avian influenza viruses.


This study was supported by the Ministry of Science and Technology (KJYJ-2013-01-01,KJYJ-2013-01-01-02, and 2012ZX10004214), and by the China Agriculture Research System (CARS-42-G08), and by Ningxia Science and Technology Department (2013ZZN30).


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Technical Appendix

Suggested citation for this article: Shi J, Deng G, Zeng X, Kong H, Wang X, Lu K, et al. Novel influenza A(H7N2) virus in chickens, Jilin Province, China, 2014. Emerg Infect Dis [Internet]. 2014 Oct [date cited]. http://dx.doi.org/10.3201/eid2010.140869
DOI: 10.3201/eid2010.140869

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