نتایج جستجو برای: LP H7N1

تعداد نتایج: 16131  

Journal: :Journal of virology 2016
El-Sayed M Abdelwhab Jutta Veits Kerstin Tauscher Mario Ziller Jens P Teifke Jürgen Stech Thomas C Mettenleiter

UNLABELLED In 1999, after circulation for a few months in poultry in Italy, low-pathogenic (LP) avian influenza (AI) H7N1 virus mutated into a highly pathogenic (HP) form by acquisition of a unique multibasic cleavage site (mCS), PEIPKGSRVRR*GLF (asterisk indicates the cleavage site), in the hemagglutinin (HA) and additional alterations with hitherto unknown biological function. To elucidate th...

Journal: :iranian journal of veterinary research 2008
h. nili s. essen a. nunez j. banks i. h. brown

most highly pathogenic avian influenza viruses (aiv) emerge after field passage of non-pathogenic aivs in birds. the outbreak of low-pathogenic h7n1 avian influenza virus in italy during 1999-2000 followed by outbreak of highly pathogenic h7n1 avian influenza virus is one example in this regard. this experiment has been designed to investigate the effect of pre-infection of birds with lpai on s...

A. Nunez H. Nili, I. H. Brown J. Banks S. Essen

Most highly pathogenic avian influenza viruses (AIV) emerge after field passage of non-pathogenic AIVs in birds. The outbreak of low-pathogenic H7N1 avian influenza virus in Italy during 1999-2000 followed by outbreak of highly pathogenic H7N1 avian influenza virus is one example in this regard. This experiment has been designed to investigate the effect of pre-infection of birds with LPAI on s...

2014
Mariya V. Sivay Kirill A. Sharshov Mary Pantin-Jackwood Vladimir V. Muzyka Alexander M. Shestopalov

We report the genome sequence of an avian influenza virus (AIV) subtype H8N8, isolated in Russia. The genome analysis shows that all genes belong to AIV Eurasian lineages. The PB2 gene was similar to a Mongolian low-pathogenic (LP) AIV H7N1 and a Chinese high-pathogenic (HP) AIV H5N2.

2016
Hongmei Jin Deli Wang Jing Sun Yanfang Cui Guang Chen Xiaolin Zhang Jiajie Zhang Xiang Li Hongliang Chai Yuwei Gao Yanbing Li Yuping Hua

The emergence of human infections with a novel H7N9 influenza strain has raised global concerns about a potential human pandemic. To further understand the character of other influenza viruses of the H7 subtype, we selected two H7N1 avian influenza viruses (AIVs) isolated from wild birds during routine surveillance in China: A/Baer's Pochard/Hunan/414/2010 (BP/HuN/414/10) (H7N1) and A/Common Po...

2013
Kateri Bertran Roser Dolz Núria Busquets Virginia Gamino Júlia Vergara-Alert Aida J Chaves Antonio Ramis Xavier F Abad Ursula Höfle Natàlia Majó

European quail (Coturnix c. coturnix) may share with Japanese quail (Coturnix c. japonica) its potential as an intermediate host and reservoir of avian influenza viruses (AIV). To elucidate this question, European quail were experimentally challenged with two highly pathogenic AIV (HPAIV) (H7N1/HP and H5N1/HP) and one low pathogenic AIV (LPAIV) (H7N2/LP). Contact animals were also used to asses...

2009
Marek J. Slomka Theo Pavlidis Vivien J. Coward John Voermans Guus Koch Amanda Hanna Jill Banks Ian H. Brown

BACKGROUND Avian influenza (AI) caused by H7 AI viruses (AIVs) of both low pathogenicity (LP) and high pathogenicity (HP) are notifiable poultry diseases. OBJECTIVES Design and validate two RealTime reverse transcriptase polymerase chain reactions (RRT PCRs) for Eurasian H7 AIV detection and pathotyping. METHODS The H7 RRT PCRs amplified within the (i) HA2 and (ii) cleavage site CS regions ...

2015
Aurora Romero Tejeda Roberta Aiello Angela Salomoni Valeria Berton Marta Vascellari Giovanni Cattoli

The study of influenza type A (IA) infections in wild mammals populations is a critical gap in our knowledge of how IA viruses evolve in novel hosts that could be in close contact with avian reservoir species and other wild animals. The aim of this study was to evaluate the susceptibility to infection, the nasal shedding and the transmissibility of the H7N1 and H5N1 highly pathogenic avian infl...

Journal: :Applied and environmental microbiology 2012
Josefine Elving Eva Emmoth Ann Albihn Björn Vinnerås Jakob Ottoson

Effective sanitization is important in viral epizootic outbreaks to avoid further spread of the pathogen. This study examined thermal inactivation as a sanitizing treatment for manure inoculated with highly pathogenic avian influenza virus H7N1 and bacteriophages MS2 and 6. Rapid inactivation of highly pathogenic avian influenza virus H7N1 was achieved at both mesophilic (35°C) and thermophilic...

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 ...

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