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Surveillance of Avian Influenza Viruses in Wild Birds in Taiwan in 2007  

Update Date: [2013-11-14]
No.:43

Reporton.
AHRI report No.43
Topic
Surveillance of Avian Influenza Viruses in Wild Birds in Taiwan in 2007
Department
Animal Health Research Institute, Council of Agriculture, Executive Yuan
Author
M. C. Cheng *, M. S. Lee, L. H. Chen, Y. P. Liu, S. T. Kuo, S. H. Lee
Summary
The purpose of this surveillance is to make an early warning of highly pathogenic H5N1 and to realize the epidemiology of avian influenza in Taiwan’s wild birds. In 2007, a total of 4,150 specimens collected from wild birds of Taipei, Taichung, Chunghua, Chayi, Tainan, Koushong, Yielan, Hwalien, and Kingmen were examined for avian influenza viruses. Twenty-four viruses were isolated (0.58% isolated rate) and subtyped as H1N1 (n = 2), H1N2 (n = 1), H3N8 (n = 4), H4N6 (n = 10), H6N1 (n = 1), H7N6 (n =3), H7N7 (n =1), H8N4 (n = 1) and H10N7 (n = 1).  All of these viruses were isolated from fecal specimens of duck species. Three H7N6 and one H7N7 viruses of low pathogenic strains (IVPI 0.0) were isolated from field ducks in wetland of Tainan.  In conclusion, H5N1 did not been isolated in this study.  This results indicated that the spread of H5N1 virus into Taiwan via the migratory birds was not occurred in 2007.
Keyword
Avian influenza, Virologic surveillance