ACTA VETERINARIA ET ZOOTECHNICA SINICA

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Isolation, Identification and Phylogenetic Analysis of a Novel Swine-originInfluenza A (H1N1) Virus

ZHANG Hong-na1, MIAO Zeng-min2, LI Xin1, WANG Hao1, ZHOU Yu-fa4, XIA Xian-zhu3, CHAI Tong-jie1*   

  1. 1. College of Animal Science and Veterinary Medicine, Shandong Agricultural University,Tai’an 271018 China; 2. School of Biologic Science, Taishan Medical University, Tai’an 271016,China; 3. Institute of Military Veterinary, Academy of Military Medical Sciences PLA, Changchun 130000, China; 4. Animal Husbandry Bureau of Daiyue Region, Tai’an 271000, China
  • Received:2012-09-03 Online:2013-04-23 Published:2013-04-23

Abstract:

The study was carried out to examine the genetic characteristics of a novel swineorigin influenza A (H1N1) virus isolated from Shandong province. Samples from suspected influenza-infected pigs were collected for viral isolation and identification, and then genetic evolution of HANAPB2,PB1,PANPNS and M of the isolate (A/swine/Shandong/07/2011) was analyzed and compared with the related influenza viruses. The results showed that sequences of 8 fragments of the isolated virus revealed >99% nucleotide identity with A/H1N1(2009) prototype strain, and its HA cleavage and receptor-binding sites were PSIQSR↓GLFGAI and 190D, 225 D, respectively, which were identifical with A/H1N1(2009) . However, compared with HA protein of A/H1N1(2009), mutation Q226R occurred in receptor binding site of the isolate. In conclusion, the results of this study provided significant information for further research on molecular evolution of novel swine-origin influenza A (H1N1) virus.

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