نتایج جستجو برای: h7n1

تعداد نتایج: 134  

2010
Michela Rigoni Anna Toffan Elisabetta Viale Marzia Mancin Filippo Cilloni Elena Bertoli Angela Salomoni Sabrina Marciano Adelaide Milani Bianca Zecchin Ilaria Capua Giovanni Cattoli

Highly pathogenic avian influenza (HPAI) viruses of the H5 and H7 subtype pose a major public health threat due to their capacity to cross the species barrier and infect mammals, for example dogs, cats and humans. In the present study we tested the capacity of selected H7 and H5 HPAI viruses to infect and to be transmitted from infected BALB/c mice to contact sentinels. Previous experiments hav...

Journal: :Avian pathology : journal of the W.V.P.A 2000
I Capua S Marangon

During 1999, northern Italy has been affected by an epidemic of low pathogenicity avian influenza (LPAI) caused by a virus of the H7N1 subtype. Due to the characteristics of the poultry industry in the area and to the absence of specific legislative tools to eradicate infection, the virus continued to circulate for several months until a highly pathogenic virus of the same subtype emerged. The ...

2016
E. M. Abdelwhab Jutta Veits Reiner Ulrich Elisa Kasbohm Jens P. Teifke Thomas C. Mettenleiter

Acquisition of a polybasic cleavage site (pCS) in the hemagglutinin (HA) is a prerequisite for the shift of low pathogenic (LP) avian influenza virus (AIV) to the highly pathogenic (HP) form in chickens. Whereas presence of a pCS is required for high pathogenicity, less is known about the effect of composition of pCS on virulence of AIV particularly H7N7. Here, we investigated the virulence of ...

2017
Kim Je Hyoung Irshad Ahmed Hajam John Hwa Lee

H7N3 and H7N7 are highly pathogenic avian influenza (HPAI) viruses and have posed a great threat not only for the poultry industry but for the human health as well. H7N9, a low pathogenic avian influenza (LPAI) virus, is also highly pathogenic to humans, and there is a great concern that these H7 subtypes would acquire the ability to spread efficiently between humans, thereby becoming a pandemi...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2009
Munir Iqbal Hiaxia Xiao Greg Baillie Andrew Warry Steve C Essen Brandon Londt Sharon M Brookes Ian H Brown John W McCauley

The emergence and spread of H5N1 avian influenza viruses from Asia through to Europe and Africa pose a significant animal disease problem and have raised concerns that the virus may pose a pandemic threat to humans. The epizootological factors that have influenced the wide distribution of the virus are complex, and the variety of viruses currently circulating reflects these factors. Sequence an...

Journal: :Avian Pathology 2008
Anna Toffan Maria Serena Beato Roberta De Nardi Elena Bertoli Annalisa Salviato Giovanni Cattoli Calogero Terregino Ilaria Capua

Highly pathogenic avian influenza (HPAI) viruses cause viraemia and systemic infections with virus replication in internal organs and muscles; in contrast, low pathogenicity avian influenza (LPAI) viruses produce mild infections with low mortality rates and local virus replication. There is little available information on the ability of LPAI viruses to cause viraemia or on the presence of avian...

2016
Sylvie Marché Thierry van den Berg Bénédicte Lambrecht

Serological monitoring is a feature of surveillance programmes for the detection of the circulation of notifiable low pathogenic avian influenza (LPAI) viruses in commercial poultry holdings. Commercial multispecies nucleoprotein (NP) enzyme-linked immunosorbent assays (ELISAs) have been replacing the haemagglutination inhibition (HI) test as pre-screening tools. Few comparative studies have be...

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