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https://www.readbyqxmd.com/read/28298880/h7n9-and-h5n1-avian-influenza-suitability-models-for-china-accounting-for-new-poultry-and-live-poultry-markets-distribution-data
#1
Jean Artois, Shengjie Lai, Luzhao Feng, Hui Jiang, Hang Zhou, Xiangping Li, Madhur S Dhingra, Catherine Linard, Gaëlle Nicolas, Xiangming Xiao, Timothy P Robinson, Hongjie Yu, Marius Gilbert
In the last two decades, two important avian influenza viruses infecting humans emerged in China, the highly pathogenic avian influenza (HPAI) H5N1 virus in the late nineties, and the low pathogenic avian influenza (LPAI) H7N9 virus in 2013. China is home to the largest population of chickens (4.83 billion) and ducks (0.694 billion), representing, respectively 23.1 and 58.6% of the 2013 world stock, with a significant part of poultry sold through live-poultry markets potentially contributing to the spread of avian influenza viruses...
2017: Stochastic Environmental Research and Risk Assessment: Research Journal
https://www.readbyqxmd.com/read/28293218/genetic-characterization-of-continually-evolving-highly-pathogenic-h5n6-influenza-viruses-in-china-2012-2016
#2
Meng Li, Na Zhao, Jing Luo, Yuan Li, Lin Chen, Jiajun Ma, Lin Zhao, Guohui Yuan, Chengmin Wang, Yutian Wang, Yanhua Liu, Hongxuan He
H5N6 is a highly pathogenic avian influenza (HPAI) and a zoonotic disease that causes recurring endemics in East Asia. At least 155 H5N6 outbreaks, including 15 human infections, have been reported in China. These repeated outbreaks have increased concern that the H5N6 virus may cross over to humans and cause a pandemic. In February, 2016, peafowls in a breeding farm exhibited a highly contagious disease. Post-mortem examinations, including RT-PCR, and virus isolation, confirmed that the highly pathogenic H5N6 influenza virus was the causative agent, and the strain was named A/Pavo Cristatus/Jiangxi/JA1/2016...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28292308/surveillance-of-avian-influenza-viruses-in-south-korea-between-2012-and-2014
#3
Eun-Kyoung Lee, Hyun-Mi Kang, Byung-Min Song, Yu-Na Lee, Gyeong-Beum Heo, Hee-Soo Lee, Youn-Jeong Lee, Jae-Hong Kim
BACKGROUND: National surveillance of avian influenza virus (AIV) in South Korea has been annually conducted for the early detection of AIV and responses to the introduction of highly pathogenic avian influenza (HPAI) virus. In this study, we report on a nationwide surveillance study of AIV in domestic poultry and wild birds in South Korea between 2012 and 2014. METHODS: During the surveillance programs between 2012 and 2014, 141,560 samples were collected. Of these, 102,199 were from poultry farms, 8215 were from LBMs, and 31,146 were from wild bird habitats...
March 14, 2017: Virology Journal
https://www.readbyqxmd.com/read/28277218/emerging-highly-pathogenic-h5-avian-influenza-viruses-in-france-during-winter-2015-16-phylogenetic-analyses-and-markers-for-zoonotic-potential
#4
François-Xavier Briand, Audrey Schmitz, Katell Ogor, Aurélie Le Prioux, Cécile Guillou-Cloarec, Carole Guillemoto, Chantal Allée, Marie-Odile Le Bras, Edouard Hirchaud, Hélène Quenault, Fabrice Touzain, Martine Cherbonnel-Pansart, Evelyne Lemaitre, Céline Courtillon, Hélène Gares, Patrick Daniel, Alexandre Fediaevsky, Pascale Massin, Yannick Blanchard, Nicolas Eterradossi, Sylvie van der Werf, Véronique Jestin, Eric Niqueux
Several new highly pathogenic (HP) H5 avian influenza virus (AIV) have been detected in poultry farms from south-western France since November 2015, among which an HP H5N1. The zoonotic potential and origin of these AIVs immediately became matters of concern. One virus of each subtype H5N1 (150169a), H5N2 (150233) and H5N9 (150236) was characterised. All proved highly pathogenic for poultry as demonstrated molecularly by the presence of a polybasic cleavage site in their HA protein - with a sequence (HQRRKR/GLF) previously unknown among avian H5 HPAI viruses - or experimentally by the in vivo demonstration of an intravenous pathogenicity index of 2...
March 2, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28275173/tropism-and-innate-host-responses-of-influenza-a-h5n6-virus-an-analysis-of-ex%C3%A2-vivo-and-in-vitro-cultures-of-the-human-respiratory-tract
#5
Kenrie P Y Hui, Louisa L Y Chan, Denise I T Kuok, Chris K P Mok, Zi-Feng Yang, Run-Feng Li, Geraldine S M Luk, Elaine F Lee, Jimmy C C Lai, Hui-Ling Yen, Huachen Zhu, Yi Guan, John M Nicholls, J S Malik Peiris, Michael C W Chan
Since their first isolation in 2013, influenza A/H5N6 viruses have spread amongst poultry across multiple provinces in China and to Laos, Vietnam and Myanmar. So far, there have been 14 human H5N6 infections with 10 fatalities.We investigated the tropism, replication competence and cytokine induction of one human and two avian H5N6 isolates in ex vivo and in vitro cultures derived from the human respiratory tract. Virus tropism and replication were studied in ex vivo cultures of human nasopharynx, bronchus and lung...
March 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28274236/isolation-and-genetic-characterization-of-a-novel-2-2-1-2a-h5n1-virus-from-a-vaccinated-meat-turkeys-flock-in-egypt
#6
Ahmed H Salaheldin, Jutta Veits, Hatem S Abd El-Hamid, Timm C Harder, Davud Devrishov, Thomas C Mettenleiter, Hafez M Hafez, Elsayed M Abdelwhab
BACKGROUND: Vaccination of poultry to control highly pathogenic avian influenza virus (HPAIV) H5N1 is used in several countries. HPAIV H5N1 of clade 2.2.1 which is endemic in Egypt has diversified into two genetic clades. Clade 2.2.1.1 represents antigenic drift variants in vaccinated commercial poultry while clade 2.2.1.2 variants are detected in humans and backyard poultry. Little is known about H5N1 infection in vaccinated turkeys under field conditions. CASE PRESENTATION: Here, we describe an HPAI H5N1 outbreak in a vaccinated meat-turkey flock in Egypt...
March 9, 2017: Virology Journal
https://www.readbyqxmd.com/read/28273867/comparative-epidemiology-of-human-fatal-infections-with-novel-high-h5n6-and-h5n1-and-low-h7n9-and-h9n2-pathogenicity-avian-influenza-a-viruses
#7
Zu-Qun Wu, Yi Zhang, Na Zhao, Zhao Yu, Hao Pan, Ta-Chien Chan, Zhi-Ruo Zhang, She-Lan Liu
This study aimed to assess the mortality risks for human infection with high (HPAI) and low (LPAI) pathogenicity avian influenza viruses. The HPAI case fatality rate (CFR) was far higher than the LPAI CFR [66.0% (293/444) vs. 68.75% (11/16) vs. 40.4% (265/656) vs. 0.0% (0/18) in the cases with H5N1, H5N6, H7N9, and H9N2 viruses, respectively; p < 0.001]. Similarly, the CFR of the index cases was greater than the secondary cases with H5N1 [100% (43/43) vs. 43.3% (42/97), p < 0.001]. Old age [22.5 vs. 17 years for H5N1, p = 0...
March 4, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28270655/insight-into-live-bird-markets-of-bangladesh-an-overview-of-the-dynamics-of-transmission-of-h5n1-and-h9n2-avian-influenza-viruses
#8
Jasmine C M Turner, Mohammed M Feeroz, M Kamrul Hasan, Sharmin Akhtar, David Walker, Patrick Seiler, Subrata Barman, John Franks, Lisa Jones-Engel, Pamela McKenzie, Scott Krauss, Richard J Webby, Ghazi Kayali, Robert G Webster
Highly pathogenic avian influenza (HPAI) H5N1 and low pathogenic avian influenza (LPAI) H9N2 viruses have been recognized as threats to public health in Bangladesh since 2007. Although live bird markets (LBMs) have been implicated in the transmission, dissemination, and circulation of these viruses, an in-depth analysis of the dynamics of avian transmission of H5N1 and H9N2 viruses at the human-animal interface has been lacking. Here we present and evaluate epidemiological findings from active surveillance conducted among poultry in various production sectors in Bangladesh from 2008 to 2016...
March 8, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28262734/continual-antigenic-diversification-in-china-leads-to-global-antigenic-complexity-of-avian-influenza-h5n1-viruses
#9
Yousong Peng, Xiaodan Li, Hongbo Zhou, Aiping Wu, Libo Dong, Ye Zhang, Rongbao Gao, Hong Bo, Lei Yang, Dayan Wang, Xian Lin, Meilin Jin, Yuelong Shu, Taijiao Jiang
The highly pathogenic avian influenza (HPAI) H5N1 virus poses a significant potential threat to human society due to its wide spread and rapid evolution. In this study, we present a comprehensive antigenic map for HPAI H5N1 viruses including 218 newly sequenced isolates from diverse regions of mainland China, by computationally separating almost all HPAI H5N1 viruses into 15 major antigenic clusters (ACs) based on their hemagglutinin sequences. Phylogenetic analysis showed that 12 of these 15 ACs originated in China in a divergent pattern...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28245902/characterization-of-highly-pathogenic-avian-influenza-h5n1-viruses-isolated-from-domestic-poultry-in-china
#10
Cheng Cai Lai, Ke Yu Wang, Rui Chen, Ai Jun Zhang, Hong Jing Gu, Yan Bo Yin, Dong Dong Wang, Lin Lin Liu, Li Xing, Yi Gang Tong, Zong Juan Ma, Peng Hui Yang, Xi Liang Wang
The highly pathogenic avian influenza (HPAI) H5N1 virus has caused several outbreaks in domestic poultry. Despite great efforts to control the spread of this virus, it continues to evolve and poses a substantial threat to public health because of a high mortality rate. In this study, we sequenced whole genomes of eight H5N1 avian influenza viruses isolated from domestic poultry in eastern China and compared them with those of typical influenza virus strains. Phylogenetic analyses showed that all eight genomes belonged to clade 2...
January 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28237666/competition-between-low-and-high-pathogenicity-avian-influenza-in-a-two-patch-system
#11
Omar Saucedo, M Martcheva
Over the last decade, the epidemiology of avian influenza has undergone a significant transformation. Not only have we seen an increase in the number of outbreaks of the deadly strain known as highly pathogenic avian influenza (HPAI), but the number of birds infected, and the cost of control has risen drastically. Live poultry markets play a huge role in the bird to bird transmission of avian influenza. We develop a two patch model to determine the competition between low pathogenic avian influenza (LPAI) and HPAI strains when migration is present...
February 23, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/28213653/perceived-risk-of-avian-influenza-and-urbanization-in-northern-vietnam
#12
Melissa L Finucane, Nghiem Tuyen, Sumeet Saksena, James H Spencer, Jefferson M Fox, Nguyen Lam, Trinh Dinh Thau, Tran Duc Vien, Nancy Davis Lewis
Highly pathogenic avian influenza (HPAI) is an important public health concern because of potential for widespread morbidity and mortality in humans and poultry and associated devastating economic losses. We examined how perceptions of the risk of HPAI in poultry vary across communes/wards in the north of Vietnam at different levels of urbanization (rural, peri-urban, urban). Analyses of questionnaire responses from 1081 poultry raisers suggested that the perceived risk of HPAI in poultry was highest in peri-urban and rural settings...
February 17, 2017: EcoHealth
https://www.readbyqxmd.com/read/28213409/defra-announces-plans-to-amend-hpai-prevention-zone-measures
#13
(no author information available yet)
No abstract text is available yet for this article.
February 18, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28206909/a-highly-pathogenic-avian-derived-influenza-virus-h5n1-with-2009-pandemic-h1n1-internal-genes-demonstrates-increased-replication-and-transmission-in-pigs
#14
Eugenio J Abente, Pravina Kitikoon, Kelly M Lager, Phillip C Gauger, Tavis K Anderson, Amy L Vincent
This study investigated the pathogenicity and transmissibility of a reverse-genetics-derived highly pathogenic avian influenza (HPAI) H5N1 lineage influenza A virus that was isolated from a human, A/Iraq/755/06. We also examined surface gene reassortant viruses composed of the haemagglutinin and neuraminidase from A/Iraq/755/06 and the internal genes of a 2009 pandemic H1N1 virus, A/New York/18/2009 (2Iraq/06 : 6NY/09 H5N1), and haemagglutinin and neuraminidase from A/New York/18/2009 with the internal genes of A/Iraq/755/06 (2NY/09 : 6Iraq/06 H1N1)...
January 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28202755/low-pathogenic-influenza-a-viruses-in-north-american-diving-ducks-contribute-to-the-emergence-of-a-novel-highly-pathogenic-influenza-a-h7n8-virus
#15
Yifei Xu, Andrew M Ramey, Andrew S Bowman, Thomas J DeLiberto, Mary L Killian, Scott Krauss, Jacqueline M Nolting, Mia Kim Torchetti, Andrew B Reeves, Richard J Webby, David E Stallknecht, Xiu-Feng Wan
Introductions of low pathogenic avian influenza (LPAI) viruses of subtypes H5 and H7 into poultry from wild birds have the potential to mutate to highly pathogenic avian influenza (HPAI), but such viruses' origins are often unclear. In January 2016, a novel H7N8 HPAI virus caused an outbreak in turkeys in Indiana, USA. To determine the virus's origin, we sequenced genomes of 441 wild bird-origin influenza A viruses (IAVs) from North America and subjected them to evolutionary analyses. Results showed that the H7N8 LPAI virus most likely circulated among diving ducks in the Mississippi flyway during autumn 2015 and was subsequently introduced to Indiana turkeys, in which it evolved high pathogenicity...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28176609/outbreak-of-highly-pathogenic-avian-influenza-in-minnesota-in-2015
#16
Ann Fitzpatrick, Sunil K Mor, Mary Thurn, Elizabeth Wiedenman, Tracy Otterson, Robert E Porter, Devi P Patnayak, Dale C Lauer, Shauna Voss, Stephanie Rossow, James E Collins, Sagar M Goyal
The incursion of highly pathogenic avian influenza (HPAI) into the United States during 2014 resulted in an unprecedented foreign animal disease (FAD) event; 232 outbreaks were reported from 21 states. The disease affected 49.6 million birds and resulted in economic losses of $950 million. Minnesota is the largest turkey-producing state, accounting for 18% of U.S. turkey production. Areas with concentrated numbers of turkeys in Minnesota were the epicenter of the outbreak. The first case was presumptively diagnosed in the last week of February 2015 at the Minnesota Veterinary Diagnostic Laboratory (MVDL) and confirmed as HPAI H5N2 at the National Veterinary Services Laboratories on March 4, 2015...
January 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28169074/efficacy-of-clade-2-3-2-h5-commercial-vaccines-in-protecting-chickens-from-clade-2-3-4-4-h5n8-highly-pathogenic-avian-influenza-infection
#17
Seong-Su Yuk, T O Erdene-Ochir, Jung-Hoon Kwon, Jin-Yong Noh, Woo-Tack Hong, Jei-Hyun Jeong, Sol Jeong, Gyeong-Bin Gwon, Jong-Il Shin, Jung-Hyang Sur, Chang-Seon Song
Emerging clade 2.3.4.4 of the highly pathogenic avian influenza (HPAI) virus strain H5N8, which had been detected sporadically in domestic poultry in China, started to affect wild birds and poultry in South Korea in 2014. The virus was spread to Germany, Italy, the Netherlands, United Kingdom, and even United States by migratory birds. Here, we tested currently used commercial clade 2.3.2 H5 vaccines to evaluate mortality, clinical signs, virus shedding, and histological damage after experimental infection of chickens with the clade 2...
February 3, 2017: Vaccine
https://www.readbyqxmd.com/read/28160424/social-network-analysis-of-the-movement-of-poultry-to-and-from-live-bird-markets-in-bali-and-lombok-indonesia
#18
J Kurscheid, M Stevenson, P A Durr, J-A L M L Toribio, S Kurscheid, I G A A Ambarawati, M Abdurrahman, S Fenwick
Highly pathogenic avian influenza H5N1 has resulted in large losses to the Indonesian poultry sector. Evidence suggests that live bird markets (LBMs) play an important role in the epidemiology of the disease. Knowledge of the frequency and type of contact between the various poultry market players should allow animal health authorities to develop a better understanding of factors influencing virus transmission between Indonesian villages. A questionnaire-based cross-sectional survey was conducted in 17 LBMs on the neighbouring Indonesian islands of Bali and Lombok to investigate the movement patterns of poultry to and from markets...
February 4, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28116911/co-circulation-of-paramyxo-and-influenza-viruses-in-pigeons-in-egypt
#19
Shimaa M G Mansour, Fakry F Mohamed, Amal A M Eid, Sunil K Mor, Sagar M Goyal
In recent years, avian influenza virus (AIV) and Newcastle disease virus (NDV) have caused large-scale outbreaks in many countries, including Egypt. The culling and vaccination strategies have failed to control both viruses in Egypt. In this study, we investigated the outbreaks of nervous manifestations and deaths in pigeons between 2013 and 2015. The H5N1 subtype of the highly pathogenic avian influenza (HPAI) virus and pigeon paramyxovirus-1 (PPMV-1), an antigenic variant of NDV, were found to be the cause; AIV and PPMV-1 were isolated from 61...
January 24, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28108705/second-turkey-flock-affected-by-h5n8-hpai
#20
(no author information available yet)
No abstract text is available yet for this article.
January 21, 2017: Veterinary Record
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