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Volume 18, Number 7—July 2012

Human Infection from Avian-like Influenza A (H1N1) Viruses in Pigs, China

Huanliang Yang1, Chuanling Qiao1, Xu Tang, Yan Chen, Xiaoguang Xin, and Hualan ChenComments to Author 
Author affiliations: Author affiliation: State Key Laboratory of Veterinary Biotechnology–Harbin Veterinary Research Institute, Harbin, People’s Republic of China

Main Article


Antigenic analysis of H1 swine influenza viruses, People’s Republic of China*

Virus HI antibody titers of chicken antiserum against†
Classical swine A (H1N1) Triple-reassortant A (H1N2) A (H1N1) pdm09 Human seasonal A (H1N1) Avian-like swine A (H1N1)§ Avian-like swine A (H1N1)¶
Classical swine A (H1N1) 512 512 512 8
Triple-reassortant A (H1N2) 1024 512 1,024 8
A(H1N1)pdm09 512 512 1,024 16
Human seasonal A (H1N1) 16 32 64 32 32 64
Avian-like swine A (H1N1)§ 128 64 128 512 256
Avian-like swine A (H1N1)¶ 32 16 64 256 256

*Classical swine A (H1N1), A/swine/Guangdong/6/2010; triple-reassortant A (H1N2), A/swine/Tianjin/1/2007; A(H1N1)pdm09, A/swine/Heilongjiang/44/2009; human seasonal A (H1N1), A/swine/Hebei/15/2009.
†Antiserum was generated by inoculating specific pathogen-free chickens with an oil-emulsified inactivated vaccine derived from the indicated viruses. Homologous titers are shown in boldface.
‡HI titer <2.

Main Article

1These authors contributed equally to this article.

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