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J Gen Virol 72 (1991), 711-714; DOI 10.1099/0022-1317-72-3-711
© 1991 Society for General Microbiology
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Prevalence of antibody to influenza C virus among pigs in Hyogo Prefecture, Japan

Masaoki Yamaoka1, Hak Hotta2, Masae Itoh2 and Morio Homma2

1 Division of Microbiology, Public Health Institute of Hyogo Prefecture, 2-1-29 Arata-cho, Hyogo-ku, Kobe 652
and2 Department of Microbiology, Kobe University School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650, Japan

The prevalence of influenza C virus among pigs in Hyogo Prefecture, Japan, was investigated by serological techniques. Out of 240 sera tested, 45 (19%) showed haemagglutination inhibition (HI) to influenza C virus. Pig sera with high HI titres also scored high in neutralization tests and ELISAs. When fractionated by sucrose density gradient ultracentrifugation, the HI/ELISA reactivities corresponded to antibodies of the IgM and IgG classes. Radioimmunoprecipitation tests revealed that some, but not all, of the pig sera with high HI activities precipitated HEF glycoprotein of influenza C virus. These results suggested that the HI activities of pig sera in Hyogo Prefecture were due to the presence of antibody to influenza C virus. Sera with IgM class antibody to influenza C virus were found throughout the year. However, the question of whether or not pigs serve as a natural reservoir for human influenza C virus still remains to be solved.

Received 30 August 1990; accepted 17 December 1990.


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B. Crescenzo-Chaigne and S. van der Werf
Rescue of Influenza C Virus from Recombinant DNA
J. Virol., October 15, 2007; 81(20): 11282 - 11289.
[Abstract] [Full Text] [PDF]


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