Archives of Virology

, 154:677

A comparison of the pathogenicity of avian and swine H5N1 influenza viruses in Indonesia

  • Ryo Takano
  • Chairul A. Nidom
  • Maki Kiso
  • Yukiko Muramoto
  • Shinya Yamada
  • Kyoko Shinya
  • Yuko Sakai-Tagawa
  • Yoshihiro Kawaoka
Brief Report

Abstract

Highly pathogenic avian influenza H5N1 viruses are circulating in many countries. We recently discovered that these viruses have been transmitted to pigs on multiple occasions in Indonesia. To investigate whether avian H5N1 influenza viruses adapted to mammals through their introduction into pigs, we examined the growth of avian and swine isolates in cell culture and compared their pathogenicity in mice. We found that swine isolates were less virulent to mice than avian isolates, suggesting that the viruses became attenuated during their replication in pigs. Continuous surveillance of H5N1 viruses among pigs is clearly warranted.

Abbreviations

HA

Hemagglutinin

MDCK

Madin–Darby canine kidney

EID50

50% Egg infective dose

TCID50

50% Tissue culture infective dose

MLD50

50% Mouse lethal dose

Ck

Chicken

Dk

Duck

Fl

Feline

Qa

Quail

IDN

Indonesia

Sw

Swine

PB2

Polymerase basic protein 2

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Ryo Takano
    • 1
  • Chairul A. Nidom
    • 2
    • 3
  • Maki Kiso
    • 1
  • Yukiko Muramoto
    • 1
  • Shinya Yamada
    • 1
  • Kyoko Shinya
    • 4
  • Yuko Sakai-Tagawa
    • 1
  • Yoshihiro Kawaoka
    • 1
    • 4
    • 5
    • 6
  1. 1.Division of Virology, Department of Microbiology and ImmunologyUniversity of TokyoMinato-kuJapan
  2. 2.Faculty of Veterinary MedicineAirlangga UniversitySurabayaIndonesia
  3. 3.Collaborating Research Center Emerging and Reemerging Infectious Diseases, Tropical Disease CentreAirlangga UniversitySurabayaIndonesia
  4. 4.International Centre for Medical Research and Treatment, Graduate School of MedicineKobe UniversityChuo-kuJapan
  5. 5.International Research Center for Infectious Diseases, Institute of Medical ScienceUniversity of TokyoMinato-kuJapan
  6. 6.Department of Pathological Sciences, School of Veterinary MedicineUniversity of Wisconsin-MadisonMadisonUSA

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