Characterization of An Avian Influenza Virus of Subtype H7N2 Isolated from Chickens in Northern China
Identifieur interne : 001553 ( Main/Exploration ); précédent : 001552; suivant : 001554Characterization of An Avian Influenza Virus of Subtype H7N2 Isolated from Chickens in Northern China
Auteurs : Yanbing Li [République populaire de Chine] ; Chengjun Li [République populaire de Chine] ; Liling Liu [République populaire de Chine] ; Hongwei Wang [République populaire de Chine] ; Chuanbin Wang [République populaire de Chine] ; Guobing Tian [République populaire de Chine] ; Robert G. Webster [États-Unis] ; Kangzhen Yu [République populaire de Chine] ; Hualan Chen [République populaire de Chine]Source :
- Virus Genes [ 0920-8569 ] ; 2006-08-01.
Descripteurs français
- KwdFr :
- MESH :
- génétique : Virus de la grippe A.
- virologie : Grippe chez les oiseaux, Poulets.
- Animaux, Chine, Données de séquences moléculaires, Femelle, Souris, Souris de lignée BALB C, Virus de la grippe A.
- Wicri :
- geographic : République populaire de Chine.
English descriptors
- KwdEn :
- Animals, Avian influenza virus, Chicken, Chickens (virology), China, Female, Genetic analysis, H7N2 subtype, Influenza A virus (chemistry), Influenza A virus (classification), Influenza A virus (genetics), Influenza in Birds (virology), Mice, Mice, Inbred BALB C, Molecular Sequence Data, Mouse, Pathotyping.
- MESH :
- geographic : China.
- chemistry : Influenza A virus.
- classification : Influenza A virus.
- genetics : Influenza A virus.
- virology : Chickens, Influenza in Birds.
- Animals, Female, Mice, Mice, Inbred BALB C, Molecular Sequence Data.
Abstract
Abstract: An H7N2 avian influenza virus was isolated from chickens during routine surveillance in northern China in 2002. To understand the origin of this virus, we completely sequenced its genome. The PB1, PA, HA, and M genes of this virus were highly homologous with those of the wild bird virus A/Africa starling/Eng-Q/983/79 (H7N1). The NP and NS genes were closely related to those of two other wild bird viruses isolated 30 years ago. The closest relatives of the PB2 and NA genes of the virus were those of the A/swine/Germany/2/81 (H1NI) and A/Leningrad/134/57 (H2N2), respectively. Animal inoculation tests showed that the virus cannot replicate efficiently in chickens. However, after intranasal inoculation, the virus induced 20% weight loss and replicated well in the lungs of mice. The virus was also recovered from the hearts and brains of the mice. These results suggest that the influenza virus isolated in chickens in northern China in 2002 originated in wild birds and may pose a threat for both avian species and mammalian hosts.
Url:
DOI: 10.1007/s11262-005-0042-8
Affiliations:
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To understand the origin of this virus, we completely sequenced its genome. The PB1, PA, HA, and M genes of this virus were highly homologous with those of the wild bird virus A/Africa starling/Eng-Q/983/79 (H7N1). The NP and NS genes were closely related to those of two other wild bird viruses isolated 30 years ago. The closest relatives of the PB2 and NA genes of the virus were those of the A/swine/Germany/2/81 (H1NI) and A/Leningrad/134/57 (H2N2), respectively. Animal inoculation tests showed that the virus cannot replicate efficiently in chickens. However, after intranasal inoculation, the virus induced 20% weight loss and replicated well in the lungs of mice. The virus was also recovered from the hearts and brains of the mice. These results suggest that the influenza virus isolated in chickens in northern China in 2002 originated in wild birds and may pose a threat for both avian species and mammalian hosts.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li><li>États-Unis</li></country><region><li>Tennessee</li></region><settlement><li>Pékin</li></settlement></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Li, Yanbing" sort="Li, Yanbing" uniqKey="Li Y" first="Yanbing" last="Li">Yanbing Li</name></noRegion><name sortKey="Chen, Hualan" sort="Chen, Hualan" uniqKey="Chen H" first="Hualan" last="Chen">Hualan Chen</name><name sortKey="Li, Chengjun" sort="Li, Chengjun" uniqKey="Li C" first="Chengjun" last="Li">Chengjun Li</name><name sortKey="Liu, Liling" sort="Liu, Liling" uniqKey="Liu L" first="Liling" last="Liu">Liling Liu</name><name sortKey="Tian, Guobing" sort="Tian, Guobing" uniqKey="Tian G" first="Guobing" last="Tian">Guobing Tian</name><name sortKey="Wang, Chuanbin" sort="Wang, Chuanbin" uniqKey="Wang C" first="Chuanbin" last="Wang">Chuanbin Wang</name><name sortKey="Wang, Hongwei" sort="Wang, Hongwei" uniqKey="Wang H" first="Hongwei" last="Wang">Hongwei Wang</name><name sortKey="Yu, Kangzhen" sort="Yu, Kangzhen" uniqKey="Yu K" first="Kangzhen" last="Yu">Kangzhen Yu</name><name sortKey="Yu, Kangzhen" sort="Yu, Kangzhen" uniqKey="Yu K" first="Kangzhen" last="Yu">Kangzhen Yu</name></country><country name="États-Unis"><region name="Tennessee"><name sortKey="Webster, Robert G" sort="Webster, Robert G" uniqKey="Webster R" first="Robert G." last="Webster">Robert G. 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