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Possible circulation of H5N1 avian influenza viruses in healthy ducks on farms in northern Vietnam
Author(s) -
Takakuwa Hiroki,
Yamashiro Tetsu,
Le Mai Q.,
Phuong Lien S.,
Ozaki Hiroichi,
Tsunekuni Ryota,
Usui Tatsufumi,
Ito Hiroshi,
Yamaguchi Tsuyoshi,
Ito Toshihiro,
Murase Toshiyuki,
Ono Etsuro,
Otsuki Koichi
Publication year - 2010
Publication title -
microbiology and immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 70
eISSN - 1348-0421
pISSN - 0385-5600
DOI - 10.1111/j.1348-0421.2009.00170.x
Subject(s) - influenza a virus subtype h5n1 , embryonated , biology , outbreak , virology , serology , neuraminidase , hemagglutinin (influenza) , h5n1 genetic structure , veterinary medicine , antibody , virus , immunology , covid-19 , medicine , disease , pathology , infectious disease (medical specialty)
To estimate the prevalence of influenza A subtype H5N1 viruses among domestic ducks in the period between October and November 2006 when H5N1 outbreaks had been absent, 1106 healthy ducks raised in northern Vietnam were collected. Inoculation of all throat and cloacae samples into embryonated eggs resulted in the isolation of subtype H3N8 in 13 ducks, but not H5N1 viruses. Serological analyses demonstrated that five ducks (0.45%) solely developed H5N1 subtype‐specific hemagglutinin‐inhibiting and neuraminidase‐inhibiting antibodies together with anti‐non‐structural protein 1 antibodies. The results suggested that the ducks were naturally infected with H5N1 viruses when obvious H5N1 outbreaks were absent.