Molecular analysis of avian H7 influenza viruses circulating in Eurasia in 1999 2005: detection of multiple reassortant virus genotypes.

Molecular analysis of avian H7 influenza viruses circulating in Eurasia in 1999 2005: detection of multiple reassortant virus genotypes. Research Abstract Details 

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Molecular analysis of avian H7 influenza viruses circulating in Eurasia in 1999 2005: detection of multiple reassortant virus genotypes. Abstract Text:

Laura Campitelli,Angela Di Martino,Domenico Spagnolo,Gavin J D Smith,Livia Di Trani,Marzia Facchini,Maria Alessandra De Marco,Emanuela Foni,Chiara Chiapponi,Ana Moreno Martin,Honglin Chen,Yi Guan,Mauro Delogu,Isabella Donatelli,Laura Campitelli,Angela Di Martino,Domenico Spagnolo,Gavin J D Smith,Livia Di Trani,Marzia Facchini,Maria Alessandra De Marco,Emanuela Foni,Chiara Chiapponi,Ana Moreno Martin,Honglin Chen,Yi Guan,Mauro Delogu,Isabella Donatelli,

Avian influenza infections by high and low pathogenicity H7 influenza viruses have caused several outbreaks in European poultry in recent years, also resulting in human infections. Although in some cases the source of H7 strains from domestic poultry was shown to be the viruses circulating in the wild bird reservoir, a thorough characterization of the entire genome of H7 viruses from both wild and domestic Eurasian birds, and their evolutionary relationships, has not been conducted. In our study, we have analysed low pathogenicity H7 influenza strains isolated from wild and domestic ducks in Italy and southern China and compared them with those from reared terrestrial poultry such as chicken and turkey. Phylogenetic analysis demonstrated that the H7 haemagglutinin genes were all closely related to each other, whereas the remaining genes could be divided into two or more phylogenetic groups. Almost each year different H7 reassortant viruses were identified and in at least two different years more than one H7 genotype co-circulated. A recent precursor in wild waterfowl was identified for most of the gene segments of terrestrial poultry viruses. Our data suggest that reassortment allows avian influenza viruses, in their natural reservoir, to increase their genetic diversity. In turn this might help avian influenza viruses colonize a wider range of hosts, including domestic poultry.

Molecular analysis of avian H7 influenza viruses circulating in Eurasia in 1999 2005: detection of multiple reassortant virus genotypes. Publishing Authors By Initials

L Campitelli,A Di Martino,D Spagnolo,GJ Smith,L Di Trani,M Facchini,MA De Marco,E Foni,C Chiapponi,AM Martin,H Chen,Y Guan,M Delogu,I Donatelli,L Campitelli,A Di Martino,D Spagnolo,GJ Smith,L Di Trani,M Facchini,MA De Marco,E Foni,C Chiapponi,AM Martin,H Chen,Y Guan,M Delogu,I Donatelli,

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Molecular analysis of avian H7 influenza viruses circulating in Eurasia in 1999 2005: detection of multiple reassortant virus genotypes. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of general virology

VOLUME: 89

Page Numbers: 48-59

Journal Abbreviation: J. Gen. Virol.

ISSN: 0022-1317

DAY: 19

MONTH: Jan

YEAR: 2008

Molecular analysis of avian H7 influenza viruses circulating in Eurasia in 1999 2005: detection of multiple reassortant virus genotypes. Information

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LANGUAGE: eng

NlmUniqueID: 77340

Molecular analysis of avian H7 influenza viruses circulating in Eurasia in 1999 2005: detection of multiple reassortant virus genotypes. Keywords Mesh Terms:

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AFFILIATION: Department of Infectious, Parasitic and Immune-Mediated Diseases and Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy.

Country: England

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MEDLINETA: J Gen Virol

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