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https://www.readbyqxmd.com/read/28333986/building-the-road-to-a-regional-zoonoses-strategy-a-survey-of-zoonoses-programmes-in-the-americas
#1
Melody J Maxwell, Mary H Freire de Carvalho, Armando E Hoet, Marco A N Vigilato, Julio C Pompei, Ottorino Cosivi, Victor J Del Rio Vilas
BACKGROUND: In recent years, global public health security has been threatened by zoonotic disease emergence as exemplified by outbreaks of H5N1 and H1N1 influenza, SARS, and most recently Ebola and Zika. Additionally, endemic zoonoses, such as rabies, burden countries year after year, placing demands on limited finances and personnel. To survey the baseline status of the emerging and endemic zoonoses programmes of the Latin American and the Caribbean (LAC) countries, the Pan American Health Organization (PAHO) conducted a survey of priority emerging and endemic zoonoses, countries´ prioritization criteria and methodologies, and suggestions to strengthen countries capacities and regional approaches to zoonoses control...
2017: PloS One
https://www.readbyqxmd.com/read/28332646/the-role-of-animal-reservoirs-in-social-environmental-landscapes-remarks-on-the-control-of-avian-influenza-and-preparedness-for-pandemics
#2
M P Ortiz-Rodríguez, G C Ramírez-Nieto, L C Villamil-Jiménez
Influenza viruses are well known for their ability to infect and cause disease in a broad range of hosts. Modern advances in reverse genetics have enabled scientists to probe the mutations that allow influenza viruses to perform host switching. Despite this detailed understanding of the molecular modifications that allow host switching and adaptation, there is a gap in knowledge regarding the factors external to the virus and their interactions that act as triggers leading to a pandemic. Studies on the ecology of zoonotic pathogens should be the new paradigm for understanding not only influenza viruses but any other infectious disease that can be a threat to animal and human health...
December 2016: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28332645/epidemiological-role-of-birds-in-the-transmission-and-maintenance-of-zoonoses
#3
A Contreras, A Gómez-Martín, A Paterna, J Tatay-Dualde, M Prats-Van Der Ham, J C Corrales, C De La Fe, A Sánchez
The risk of zoonoses spreading from birds to humans is lower, quantitatively speaking, than the risk of transmission between other host groups, because the two taxonomic groups share fewer pathogens. Nevertheless, birds have a number of epidemiological characteristics that make them extremely important hosts in the transmission and maintenance of zoonoses, including their susceptibility to pathogens that are extremely hazardous to humans (such as highly pathogenic avian influenza virus, West Nile virus and Chlamydia psittaci) and their ability to travel long distances, especially in the case of migratory birds...
December 2016: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28332599/erratum-characterization-of-the-pathogenesis-of-h10n3-h10n7-and-h10n8-subtype-avian-influenza-viruses-circulating-in-ducks
#4
Miaomiao Zhang, Xingxing Zhang, Kaidi Xu, Qiaoyang Teng, Qinfang Liu, Xuesong Li, Jianmei Yang, Jianqing Xu, Hongjun Chen, Xiaoyan Zhang, Zejun Li
No abstract text is available yet for this article.
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28331080/evaluation-of-the-immune-responses-to-and-cross-protective-efficacy-of-eurasian-h7-avian-influenza-viruses
#5
Hyeok-Il Kwon, Young-Il Kim, Su-Jin Park, Min-Suk Song, Eun-Ha Kim, Se Mi Kim, Young-Jae Si, In-Won Lee, Byung-Min Song, Youn-Jeong Lee, Seok Joong Yun, Wun-Jae Kim, Young Ki Choi
Due to increasing concerns of human infection by various H7 viruses, including recent H7N9 viruses, we evaluated the genetic relationships and the cross-protective efficacies of three different Eurasian H7 avian influenza viruses. Phylogenic and molecular analysis revealed that recent Eurasian H7 viruses can be separated into two different lineages with relatively high amino acid identity within groups (94.8 to 98.8%), and low amino acid identity (90.3 to 92.6 %) between the groups. In vivo immunization with representatives of each group revealed that while group-specific cross-reactivity was induced, cross-reactive HI titers were approximately fourfold lower against heterologous group viruses compared to homologous group viruses...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28327168/identification-of-two-novel-reassortant-avian-influenza-a-h5n6-viruses-in-whooper-swans-in-korea-2016
#6
Jipseol Jeong, Chanjin Woo, Hon S Ip, Injung An, Youngsik Kim, Kwanghee Lee, Seong-Deok Jo, Kidong Son, Saemi Lee, Jae-Ku Oem, Seung-Jun Wang, Yongkwan Kim, Jeonghwa Shin, Jonathan Sleeman, Weonhwa Jheong
BACKGROUND: On November 20, 2016 two novel strains of H5N6 highly pathogenic avian influenza virus (HPAIVs) were isolated from three whooper swans (Cygnus cygnus) at Gangjin Bay in South Jeolla province, South Korea. Identification of HPAIVs in wild birds is significant as there is a potential risk of transmission of these viruses to poultry and humans. RESULTS: Phylogenetic analysis revealed that Gangjin H5N6 viruses classified into Asian H5 clade 2.3.4.4 lineage and were distinguishable from H5N8 and H5N1 HPAIVs previously isolated in Korea...
March 21, 2017: Virology Journal
https://www.readbyqxmd.com/read/28325922/variability-in-h9n2-haemagglutinin-receptor-binding-preference-and-the-ph-of-fusion
#7
Thomas P Peacock, Donald J Benton, Jean-Remy Sadeyen, Pengxiang Chang, Joshua E Sealy, Juliet E Bryant, Stephen R Martin, Holly Shelton, John W McCauley, Wendy S Barclay, Munir Iqbal
H9N2 avian influenza viruses are primarily a disease of poultry; however, they occasionally infect humans and are considered a potential pandemic threat. Little work has been performed to assess the intrinsic biochemical properties related to zoonotic potential of H9N2 viruses. The objective of this study, therefore, was to investigate H9N2 haemagglutinins (HAs) using two well-known correlates for human adaption: receptor-binding avidity and pH of fusion. Receptor binding was characterized using bio-layer interferometry to measure virus binding to human and avian-like receptor analogues and the pH of fusion was assayed by syncytium formation in virus-infected cells at different pHs...
March 22, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28325769/analysis-of-anti-influenza-virus-neuraminidase-antibodies-in-children-adults-and-the-elderly-by-elisa-and-enzyme-inhibition-evidence-for-original-antigenic-sin
#8
Madhusudan Rajendran, Raffael Nachbagauer, Megan E Ermler, Paul Bunduc, Fatima Amanat, Ruvim Izikson, Manon Cox, Peter Palese, Maryna Eichelberger, Florian Krammer
Antibody responses to influenza virus hemagglutinin provide protection against infection and are well studied. Less is known about the human antibody responses to the second surface glycoprotein, neuraminidase. Here, we assessed human antibody reactivity to a panel of N1, N2, and influenza B virus neuraminidases in different age groups, including children, adults, and the elderly. Using enzyme-linked immunosorbent assays (ELISA), we determined the breadth, magnitude, and isotype distribution of neuraminidase antibody responses to historic, current, and avian strains, as well as to recent isolates to which these individuals have not been exposed...
March 21, 2017: MBio
https://www.readbyqxmd.com/read/28325494/modelling-h5n1-in-bangladesh-across-spatial-scales-model-complexity-and-zoonotic-transmission-risk
#9
Edward M Hill, Thomas House, Madhur S Dhingra, Wantanee Kalpravidh, Subhash Morzaria, Muzaffar G Osmani, Mat Yamage, Xiangming Xiao, Marius Gilbert, Michael J Tildesley
Highly pathogenic avian influenza H5N1 remains a persistent public health threat, capable of causing infection in humans with a high mortality rate while simultaneously negatively impacting the livestock industry. A central question is to determine regions that are likely sources of newly emerging influenza strains with pandemic causing potential. A suitable candidate is Bangladesh, being one of the most densely populated countries in the world and having an intensifying farming system. It is therefore vital to establish the key factors, specific to Bangladesh, that enable both continued transmission within poultry and spillover across the human-animal interface...
February 21, 2017: Epidemics
https://www.readbyqxmd.com/read/28323816/an-ns-segment-exonic-splicing-enhancer-regulates-influenza-a-virus-replication-in-mammalian-cells
#10
Xiaofeng Huang, Min Zheng, Pui Wang, Bobo Wing-Yee Mok, Siwen Liu, Siu-Ying Lau, Pin Chen, Yen-Chin Liu, Honglian Liu, Yixin Chen, Wenjun Song, Kwok-Yung Yuen, Honglin Chen
Influenza virus utilizes host splicing machinery to process viral mRNAs expressed from both M and NS segments. Through genetic analysis and functional characterization, we here show that the NS segment of H7N9 virus contains a unique G540A substitution, located within a previously undefined exonic splicing enhancer (ESE) motif present in the NEP mRNA of influenza A viruses. G540A supports virus replication in mammalian cells while retaining replication ability in avian cells. Host splicing regulator, SF2, interacts with this ESE to regulate splicing of NEP/NS1 mRNA and G540A substitution affects SF2-ESE interaction...
March 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28323565/surveillance-for-highly-pathogenic-avian-influenza-in-wild-turkeys-meleagris-gallopavo-of-minnesota-during-2015-outbreaks-in-domestic-poultry
#11
Christopher S Jennelle, Michelle Carstensen, Erik C Hildebrand, Paul C Wolf, Daniel A Grear, Hon S Ip, Louis Cornicelli
An outbreak of a novel reassortant of highly pathogenic avian influenza A (H5N2) virus (HPAIV) decimated domestic turkeys ( Meleagris gallopavo ) from March through mid-June, 2015 in the state of Minnesota, USA. In response, as part of broader surveillance efforts in wild birds, we designed a pilot effort to sample and test hunter-harvested Wild Turkeys ( Meleagris gallopavo ) for HPAIV in Minnesota counties with known infected poultry facilities. We also collected opportunistic samples from dead Wild Turkeys or live Wild Turkeys showing neurologic signs (morbidity and mortality samples) reported by the public or state agency personnel...
March 21, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28323563/isolation-of-an-h5n8-highly-pathogenic-avian-influenza-virus-strain-from-wild-birds-in-seoul-a-highly-urbanized-area-in-south-korea
#12
Jung-Hoon Kwon, Dong-Hun Lee, Jei-Hyun Jeong, Seong-Su Yuk, Tseren-Ochir Erdene-Ochir, Jin-Yong Noh, Woo-Tack Hong, Sol Jeong, Gyeong-Bin Gwon, Sang-Won Lee, In-Soo Choi, Chang-Seon Song
Asian-lineage H5 highly pathogenic avian influenza viruses (HPAIV) have caused recurrent outbreaks in poultry and wild birds. In January 2014, H5N8 HPAIV caused outbreaks in South Korea and subsequently spread to East Asia, Europe, and North America. We report the isolation of an H5N8 HPAIV strain from wild birds in Seoul, the most-developed city in South Korea. We analyzed the complete genome sequence of this isolate and estimated its origin using a phylogenetic analysis. The Seoul H5N8 isolate clustered phylogenetically with strains isolated from migratory wild birds but was distinct from Korean poultry isolates...
March 21, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28323070/urbanization-and-the-dynamics-of-rna-viruses-in-mallards-anas-platyrhynchos
#13
Michelle Wille, Kristine Lindqvist, Shaman Muradrasoli, Björn Olsen, Josef D Järhult
Urbanization is intensifying worldwide, and affects the epidemiology of infectious diseases. However, the effect of urbanization on natural host-pathogen systems remains poorly understood. Urban ducks occupy an interesting niche in that they directly interact with both humans and wild migratory birds, and either directly or indirectly with food production birds. Here we have collected samples from Mallards residing in a pond in central Uppsala, Sweden, from January 2013 to January 2014. This artificial pond is kept ice-free during the winter months, and is a popular location where the ducks are fed, resulting in a resident population of ducks year-round...
March 17, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28322698/reassortment-of%C3%A2-influenza-a-viruses%C3%A2-in-wild-birds-in-alaska%C3%A2-before-h5-clade-2-3-4-4-outbreaks
#14
Nichola J Hill, Islam T M Hussein, Kimberly R Davis, Eric J Ma, Timothy J Spivey, Andrew M Ramey, Wendy Blay Puryear, Suman R Das, Rebecca A Halpin, Xudong Lin, Nadia B Fedorova, David L Suarez, Walter M Boyce, Jonathan A Runstadler
Sampling of mallards in Alaska during September 2014-April 2015 identified low pathogenic avian influenza A virus (subtypes H5N2 and H1N1) that shared ancestry with highly pathogenic reassortant H5N2 and H5N1 viruses. Molecular dating indicated reassortment soon after interhemispheric movement of H5N8 clade 2.3.4.4, suggesting genetic exchange in Alaska or surrounds before outbreaks.
April 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28322695/characterization-of-highly-pathogenic-avian-influenza-virus-a-h5n6-japan-november-2016
#15
Masatoshi Okamatsu, Makoto Ozawa, Kosuke Soda, Hiroki Takakuwa, Atsushi Haga, Takahiro Hiono, Aya Matsuu, Yuko Uchida, Ritsuko Iwata, Keita Matsuno, Masakazu Kuwahara, Toshiyo Yabuta, Tatsufumi Usui, Hiroshi Ito, Manabu Onuma, Yoshihiro Sakoda, Takehiko Saito, Koichi Otsuki, Toshihiro Ito, Hiroshi Kida
Highly pathogenic avian influenza viruses (HPAIVs) A(H5N6) were concurrently introduced into several distant regions of Japan in November 2016. These viruses were classified into the genetic clade 2.3.4.4c and were genetically closely related to H5N6 HPAIVs recently isolated in South Korea and China. In addition, these HPAIVs showed further antigenic drift.
April 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28321412/recombinant-lactococcus-lactis-expressing-haemagglutinin-from-a-polish-avian-h5n1-isolate-and-its-immunological-effect-in-preliminary-animal-trials
#16
Agnieszka K Szczepankowska, Katarzyna Szatraj, Przemysław Sałański, Agnieszka Rózga, Roman K Górecki, Jacek K Bardowski
Lactic acid bacteria (LAB) are Gram-positive, nonpathogenic microorganisms that are gaining much interest as antigen producers for development of live vaccine vectors. Heterologous proteins of different origin have been successfully expressed in various LAB species, including Lactococcus lactis. Recombinant L. lactis strains have been shown to induce specific local and systemic immune responses against various antigens. Our study aimed at constructing a L. lactis strain expressing haemagglutinin of a Polish avian H5H1 influenza isolate and examining its effect on animals...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28303960/the-immune-correlates-of-protection-for-an-avian-influenza-h5n1-vaccine-in-the-ferret-model-using-oil-in-water-adjuvants
#17
Sook-San Wong, Susu Duan, Jennifer DeBeauchamp, Mark Zanin, Lisa Kercher, Stephanie Sonnberg, Thomas Fabrizio, Trushar Jeevan, Jeri-Carol Crumpton, Christine Oshansky, Yilun Sun, Li Tang, Paul Thomas, Richard Webby
Because of the pathogenicity and low incidence of avian influenza virus infections in humans, the immune correlates of protection for avian influenza vaccines cannot be determined from clinical studies. Here, we used the ferret model to address this for an avian influenza H5N1 vaccine. Using oil-in-water adjuvants, we generated groups of ferrets with undetectable (geometric mean titer [GMT] < 10), low (GMT = 28.3), or high (GMT > 761.1) hemagglutination-inhibition (HAI) titers to the A/Viet Nam/1203/2004 (H5N1) virus...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28302119/efficacy-of-an-inactivated-bivalent-vaccine-against-the-prevalent-strains-of-newcastle-disease-and-h9n2-avian-influenza
#18
Jing Zhao, Huiming Yang, Hongjun Xu, Zengbin Ma, Guozhong Zhang
BACKGROUND: Newcastle disease (ND) and avian influenza subtype H9N2 (H9N2 AI) are two of the most important diseases of poultry, causing severe economic losses in the global poultry industry. Vaccination is an effective way to prevent and control the spread of ND virus (NDV) and H9N2 AI virus (AIV), but the antigenic differences between the current circulating strains and the vaccine strains might account for recent ND and H9N2 AI outbreaks in vaccinated poultry flocks. METHODS: We developed an inactivated bivalent H9N2 and NDV vaccine based on the current prevalent strains of H9N2 AIV and NDV in China and evaluated its efficacy in chickens in this study...
March 16, 2017: Virology Journal
https://www.readbyqxmd.com/read/28302021/cytokines-induced-during-influenza-virus-infection
#19
Tatiana Betáková, Anna Kostrabova, Veronika Lachova, Lucia Turianova
Influenza A virus is one of the major human pathogens. The influenza infection can pass out without any subclinical symptoms or infestation can appear in upper respiratory tract as well as in lower respiratory tract where it can result in lethal outcome. Both innate and adaptive immune responses are activated shortly after infection providing protection against infection. Many activities of the cells of innate and adaptive immunity are coordinated by cytokines. However, inordinate or disbalanced immune response may result in overproduction of cytokines as well as chemokines what can lead to severe inflammation, including excessive recruitment of neutrophils and mononuclear cells at the site of infection...
March 16, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28301246/persistence-of-highly-pathogenic-and-low-pathogenic-avian-influenza-viruses-in-footbaths-and-poultry-manure
#20
R Hauck, B Crossley, D Rejmanek, H Zhou, R A Gallardo
A questionnaire was designed in order to gather information about bedding material and footbath preparation and maintenance in different productive units across the state of California.This information was used to plan two experiments. In the first experiment, we tested the effectiveness of footbaths in inactivating highly pathogenic (HP) and low pathogenic (LP) avian influenza viruses (AIVs) on rubber boots. Surprisingly, quaternary ammonia- and quaternary ammonia + glutaraldehyde-based footbaths were not able to eliminate live HPAIV (H5N8) and LPAIV (H6N2) particles on boots, while a chlorine-based granulated disinfectant was able to destroy the virus at contact...
March 2017: Avian Diseases
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