keyword
MENU ▼
Read by QxMD icon Read
search

H7N9

keyword
https://www.readbyqxmd.com/read/28230525/inference-and-forecast-of-h7n9-influenza-in-china-2013-to-2015
#1
Ruiyun Li, Yuqi Bai, Alex Heaney, Sasikiran Kandula, Jun Cai, Xuyi Zhao, Bing Xu, Jeffrey Shaman
The recent emergence of A(H7N9) avian influenza poses a significant challenge to public health in China and around the world; however, understanding of the transmission dynamics and progression of influenza A(H7N9) infection in domestic poultry, as well as spillover transmission to humans, remains limited. Here, we develop a mathematical model-Bayesian inference system which combines a simple epidemic model and data assimilation method, and use it in conjunction with data on observed human influenza A(H7N9) cases from 19 February 2013 to 19 September 2015 to estimate key epidemiological parameters and to forecast infection in both poultry and humans...
February 16, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28220658/serological-evidence-for-exposure-to-avian-influenza-viruses-within-poultry-workers-in-southern-china
#2
E de Bruin, X Zhang, C Ke, R Sikkema, M Koopmans
The risk of infection with avian influenza viruses for poultry workers is relatively unknown in China, and study results are often biased by the notification of only the severe human cases. Protein microarray was used to detect binding antibodies to 13 different haemagglutinin (HA1-part) antigens of avian influenza A(H5N1), A(H7N7), A(H7N9) and A(H9N2) viruses, in serum samples from poultry workers and healthy blood donors collected in the course of 3 years in Guangdong Province, China. Significantly higher antibody titre levels were detected in poultry workers when compared to blood donors for the most recent H5 and H9 strains tested...
February 20, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28219161/-advances-on-epidemiological-research-of-human-infections-with-novel-avian-influenza-a-h7n9-virus
#3
Q M Wang, S L Liu, E F Chen
Human infections with novel avian influenza A(H7N9)virus was an emerging infectious disease discovered in March, 2013. As of June30, 2016, 770 cases of H7N9 were reported in worldwide including 315 deaths with 40.9% of high case fatality rate. Yangtze River Delta and Pearl River Delta were the high-prevalence area. Formerly, the cases of H7N9 were concentrated on the municipalities. However, most of the case-patients were from smaller cities or rural areas nowadays. The H7N9 human infections mainly occurred in winter and spring every waves as similar as seasonal and H5N1 human infections...
February 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28207986/novel-multiplex-assay-platforms-to-detect-influenza-a-hemagglutinin-subtype-specific-antibody-responses-for-high-throughput-and-in-field-applications
#4
Zhu-Nan Li, Jessica F Trost, Kimberly M Weber, Elizabeth H LeMasters, Sharifa Nasreen, Javan Esfandiari, Angelo H Gunasekera, Megan McCausland, Katharine Sturm-Ramirez, Jens Wrammert, Sean Gregory, Vic Veguilla, James Stevens, Joseph D Miller, Jacqueline M Katz, Min Z Levine
BACKGROUND: Detections of influenza A subtype specific antibody responses are often complicated by the presence of cross-reactive antibodies. We developed two novel multiplex platforms for antibody detection. The multiplexed magnetic fluorescence microsphere immunoassay (MAGPIX) is a high throughput laboratory-based assay. Chembio Dual Path Platform (DPP) is a portable and rapid test that could be used in the field. METHODS: Twelve recombinant globular head domain hemagglutinin (GH HA1) antigens from A(H1N1)pdm09 (pH1N1), A(H2N2), A(H3N2), A(H5N1), A(H7N9), A(H9N2), A(H13N9), B/Victoria lineage, B/Yamagata lineage viruses, and protein A control were used...
February 16, 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/28202753/mutation-of-the-2-nd-sialic-acid-binding-site-resulting-in-reduced-neuraminidase-activity-preceded-emergence-of-h7n9-influenza-a-virus
#5
Meiling Dai, Ryan McBride, Jos C F M Dortmans, Wenjie Peng, Mark J G Bakkers, Raoul J de Groot, Frank J M van Kuppeveld, James C Paulson, Erik de Vries, Cornelis A M de Haan
The emergence of novel influenza A virus (IAV) H7N9 since 2013 has caused concerns about the ability of this virus to spread between humans. Analysis of the receptor-binding properties of the H7 protein of a human isolate revealed modestly increased binding to α2,6 sialosides and reduced, but still dominant, binding to α2,3-linked sialic acids (SIAs) compared to a closely related avian H7N9 virus from 2008. Here we show that the corresponding N9 neuraminidases display equal enzymatic activity on a soluble monovalent substrate and similar substrate specificity on a glycan array...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28196469/extracorporeal-membrane-oxygenation-for-avian-influenza-a-h7n9-patient-with-acute-respiratory-distress-syndrome-a-case-report-and-short-literature-review
#6
Qi Nie, Ding-Yu Zhang, Wen-Juan Wu, Chao-Lin Huang, Zheng-Yi Ni
BACKGROUND: Extracorporeal membrane oxygenation (ECMO) is performed as an acceptable life-saving bridging procedure in patients with severe acute respiratory distress syndrome (ARDS).To patients with avian influenza A (H7N9)-associated ARDS, ECMO could be adopted as a feasible therapeutic solution. We present our successful experience with ECMO utilized in a respiratory failure patient with H7N9 infection. CASE PRESENTATION: A 44 years-old female with H7N9-induced ARDS was admitted to intensive care unit (ICU) and was treated with veno-venous ECMO for six days, antiviral therapy, prolonged corticosteroid infusion and other therapies...
February 14, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28187952/immunogenicity-and-safety-of-an-as03-adjuvanted-h7n1-vaccine-in-healthy-adults-a-phase-i-ii-observer-blind-randomized-controlled-trial
#7
Anuradha Madan, Murdo Ferguson, Eric Sheldon, Nathan Segall, Laurence Chu, Azhar Toma, Paul Rheault, Damien Friel, Jyoti Soni, Ping Li, Bruce L Innis, Anne Schuind
BACKGROUND: H7 influenza strains have pandemic potential. AS03-adjuvanted H7N1 A/mallard/Netherlands/12/2000 split-virion vaccine formulations were evaluated as model H7-subtype vaccine and tested after H7N9 emerged in China, and caused severe human disease with high mortality. METHODS: In this phase I/II, observer-blind, randomized trial in US and Canada, 420 healthy adults (21-64years) were randomized to receive 1 of 4 H7N1 vaccine formulations (3.75 or 7.5μg hemagglutinin adjuvanted with either AS03A or AS03B), 15μg unadjuvanted H7N1 hemagglutinin, or saline placebo, given as 2-dose series...
February 7, 2017: Vaccine
https://www.readbyqxmd.com/read/28162820/manipulation-of-neuraminidase-packaging-signals-and-hemagglutinin-residues-improves-the-growth-of-a-anhui-1-2013-h7n9-influenza-vaccine-virus-yield-in-eggs
#8
Subrata Barman, Petr S Krylov, Jasmine C Turner, John Franks, Robert G Webster, Matloob Husain, Richard J Webby
In 2013, a novel avian-origin H7N9 influenza A virus causing severe lower respiratory tract disease in humans emerged in China, with continued sporadic cases. An effective vaccine is needed for this virus in case it acquires transmissibility among humans; however, PR8-based A/Anhui/1/2013 (Anhui/1, H7N9), a WHO-recommended H7N9 candidate vaccine virus (CVV) for vaccine production, does not replicate well in chicken eggs, posing an obstacle to egg-based vaccine production. To address this issue, we explored the possibility that PR8's hemagglutinin (HA) and neuraminidase (NA) packaging signals mediate improvement of Anhui/1 CVV yield in eggs...
February 2, 2017: Vaccine
https://www.readbyqxmd.com/read/28159162/pandemic-and-avian-influenza-a-viruses-in-humans-epidemiology-virology-clinical-characteristics-and-treatment-strategy
#9
REVIEW
Hui Li, Bin Cao
The intermittent outbreak of pandemic influenza and emergence of novel avian influenza A virus is worldwide threat. Although most patients present with mild symptoms, some deteriorate to severe pneumonia and even death. Great progress in the understanding of the mechanism of disease pathogenesis and a series of vaccines has been promoted worldwide; however, incidence, morbidity, and mortality remains high. To step up vigilance and improve pandemic preparedness, this article elucidates the virology, epidemiology, pathogenesis, clinical characteristics, and treatment of human infections by influenza A viruses, with an emphasis on the influenza A(H1N1)pdm09, H5N1, and H7N9 subtypes...
March 2017: Clinics in Chest Medicine
https://www.readbyqxmd.com/read/28148803/m-gene-reassortment-in-h9n2-influenza-virus-promotes-early-infection-and-replication-contribution-to-rising-virus-prevalence-in-chickens-in-china
#10
Juan Pu, Honglei Sun, Yi Qu, Chenxi Wang, Weihua Gao, Junda Zhu, Yipeng Sun, Yuhai Bi, Yinhua Huang, Kin-Chow Chang, Jie Cui, Jinhua Liu
: Segment reassortment and base mutagenesis of influenza A viruses are the primary routes to the rapid evolution of high fitness virus genotypes. We recently described a predominant G57 genotype of avian H9N2 viruses that caused country-wide outbreaks in chickens in China during 2010-2013 which led to the zoonotic emergence of H7N9 viruses. One of the key features of the G57 genotype is the substitution of the earlier BJ/94-like M gene with the G1-like M gene of quail origin. We report here on the functional significance of the G1-like M gene in H9N2 viruses in conferring increased infection severity and infectivity in primary chicken embryonic fibroblasts and chickens...
February 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28105530/molecular-characterization-of-a-novel-reassortant-h7n6-subtype-avian-influenza-virus-from-poultry-in-eastern-china-in-2016
#11
Haibo Wu, Rufeng Lu, Xiuming Peng, Xiaorong Peng, Bin Chen, Linfang Cheng, Nanping Wu
During the surveillance for avian influenza viruses (AIVs) in live poultry markets in Eastern China, in 2016, a novel reassortant H7N6 AIV was isolated from a chicken. Phylogenetic analysis showed that this strain received its genes from H9N2, H7N9 and H5N6 AIVs infecting poultry in China. This strain showed moderate pathogenicity in mice and was able to replicate in mice without prior adaptation. Considering that this novel reassorted H7N6 virus was isolated from poultry in this study, it is possible that chickens play an important role in the generation of novel reassorted H7N6 AIVs...
January 19, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28091625/mplex-a-method-for-simultaneous-pathogen-inactivation-and-extraction-of-samples-for-multi-omics-profiling
#12
Kristin E Burnum-Johnson, Jennifer E Kyle, Amie J Eisfeld, Cameron P Casey, Kelly G Stratton, Juan F Gonzalez, Fabien Habyarimana, Nicholas M Negretti, Amy C Sims, Sadhana Chauhan, Larissa B Thackray, Peter J Halfmann, Kevin B Walters, Young-Mo Kim, Erika M Zink, Carrie D Nicora, Karl K Weitz, Bobbie-Jo M Webb-Robertson, Ernesto S Nakayasu, Brian Ahmer, Michael E Konkel, Vladimir Motin, Ralph S Baric, Michael S Diamond, Yoshihiro Kawaoka, Katrina M Waters, Richard D Smith, Thomas O Metz
The continued emergence and spread of infectious agents is of great concern, and systems biology approaches to infectious disease research can advance our understanding of host-pathogen relationships and facilitate the development of new therapies and vaccines. Molecular characterization of infectious samples outside of appropriate biosafety containment can take place only subsequent to pathogen inactivation. Herein, we describe a modified Folch extraction using chloroform/methanol that facilitates the molecular characterization of infectious samples by enabling simultaneous pathogen inactivation and extraction of proteins, metabolites, and lipids for subsequent mass spectrometry-based multi-omics measurements...
January 26, 2017: Analyst
https://www.readbyqxmd.com/read/28061848/multi-antigen-avian-influenza-a-h7n9-virus-like-particles-particulate-characterizations-and-immunogenicity-evaluation-in-murine-and-avian-models
#13
Che-Ming Jack Hu, Chu-Yang Chien, Ming-Tsan Liu, Zih-Syun Fang, Sui-Yuan Chang, Rong-Huay Juang, Shih-Chung Chang, Hui-Wen Chen
BACKGROUND: Human infection with avian influenza A virus (H7N9) was first reported in China in March 2013. Since then, hundreds of cases have been confirmed showing severe symptoms with a high mortality rate. The virus was transmitted from avian species to humans and has spread to many neighboring areas, raising serious concerns over its pandemic potential. Towards containing the disease, the goal of this study is to prepare a virus-like particle (VLP) that consists of hemagglutinin (HA), neuraminidase (NA) and matrix protein 1 (M1) derived from the human isolate A/Taiwan/S02076/2013(H7N9) for potential vaccine development...
January 7, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28057141/-research-on-spatiotemporal-spread-of-avian-influenza-a-h7n9-virus-based-on-discrete-geographic-information
#14
M X Wang, M Q Yuan, Y Fang
Objective: To establish a dynamic spatiotemporal spread modes of influenza A (H7N9) virus by using discrete geographic information and explore the spatiotemporal transmission of the virus. Methods: The gene sequences of H7N9 virus isolated from human in China, which were available from Global Initiative on Sharing Avian Influenza Data (GISAID), were used in alignment by using software BioEdit 7.0. Spatiotemporal spread model of H7N9 virus was established in a Bayesian statistical framework by using software BEAST 1...
November 10, 2016: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28054599/estimating-risks-of-inapparent-avian-exposure-for-human-infection-avian-influenza-virus-a-h7n9-in-zhejiang-province-china
#15
Erjia Ge, Renjie Zhang, Dengkui Li, Xiaolin Wei, Xiaomeng Wang, Poh-Chin Lai
Inapparent avian exposure was suspected for the sporadic infection of avian influenza A(H7N9) occurring in China. This type of exposure is usually unnoticed and difficult to model and measure. Infected poultry with avian influenza H7N9 virus typically remains asymptomatic, which may facilitate infection through inapparent poultry/bird exposure, especially in a country with widespread practice of backyard poultry. The present study proposed a novel approach that integrated ecological and case-control methods to quantify the risk of inapparent avian exposure on human H7N9 infection...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28011910/human-seasonal-influenza-a-viruses-induce-h7n9-cross-reactive-antibody-dependent-cellular-cytotoxicity-adcc-antibodies-that-are-directed-towards-the-nucleoprotein
#16
Sinthujan Jegaskanda, Mary Dawn T Co, John Cruz, Kanta Subbarao, Francis A Ennis, Masanori Terajima
Antibodies that mediate antibody-dependent cellular cytotoxicity (ADCC) against avian influenza virus subtypes including H7N9 and H5N1 have been detected in human sera. There are limited data on the presence of such cross-reactive ADCC mediating antibodies (ADCC-Abs) in children and the viral target(s) of these Abs are poorly understood. Using high-throughput NK cell activation and NK cytotoxicity assays, we compared ADCC-Abs in sera collected from healthy infants (≤1 year), children (2-17 years) and adults (≥18 years) against H7N9 virus-infected cells and recombinant HA, NA and NP proteins...
December 23, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28003465/structural-basis-of-influenza-virus-fusion-inhibition-by-the-antiviral-drug-arbidol
#17
Rameshwar U Kadam, Ian A Wilson
The broad-spectrum antiviral drug Arbidol shows efficacy against influenza viruses by targeting the hemagglutinin (HA) fusion machinery. However, the structural basis of the mechanism underlying fusion inhibition by Arbidol has remained obscure, thereby hindering its further development as a specific and optimized influenza therapeutic. We determined crystal structures of Arbidol in complex with influenza virus HA from pandemic 1968 H3N2 and recent 2013 H7N9 viruses. Arbidol binds in a hydrophobic cavity in the HA trimer stem at the interface between two protomers...
January 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27995031/simultaneous-detection-of-influenza-a-subtypes-of-h3n2-virus-pandemic-h1n1-2009-virus-and-reassortant-avian-h7n9-virus-in-humans-by-multiplex-one-step-real-time-rt-pcr-assay
#18
Dawei Cui, Dejian Zhao, Guoliang Xie, Xianzhi Yang, Zhaoxia Huo, Shufa Zheng, Fei Yu, Yu Chen
BACKGROUND: Influenza A virus is a leading causative pathogen of human acute respiratory infection. Recently, the co-circulation of pandemic (H1N1) 2009 and seasonal H3N2 viruses was reported, and sporadic cases with reassortant avian H7N9 virus are continually reported in China. We aimed to establish a multiplex one-step real-time reverse transcription-polymerase chain reaction (rRT-PCR) assay to simultaneously detect and discriminate FluA subtypes, including human seasonal H3N2 virus, pandemic (H1N1) 2009 virus and reassortant avian H7N9 virus, in one reaction tube...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27988501/elevation-of-creatine-kinase-is-linked-to-disease-severity-and-predicts-fatal-outcomes-in-h7n9-infection
#19
Shufa Zheng, Jianping Wu, Fei Yu, Yiyin Wang, Liming Chen, Dawei Cui, Guoliang Xie, Xianzhi Yang, Xiaogang Chen, Wen Zhang, Liang Yu, Jing Guo, Yiming Zhang, Yu Chen
No abstract text is available yet for this article.
December 19, 2016: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/27977644/assessing-change-in-avian-influenza-a-h7n9-virus-infections-during-the-fourth-epidemic-china-september-2015-august-2016
#20
Nijuan Xiang, Xiyan Li, Ruiqi Ren, Dayan Wang, Suizan Zhou, Carolyn M Greene, Ying Song, Lei Zhou, Lei Yang, C Todd Davis, Ye Zhang, Yali Wang, Jian Zhao, Xiaodan Li, A Danielle Iuliano, Fiona Havers, Sonja J Olsen, Timothy M Uyeki, Eduardo Azziz-Baumgartner, Susan Trock, Bo Liu, Haitian Sui, Xu Huang, Yanping Zhang, Daxin Ni, Zijian Feng, Yuelong Shu, Qun Li
Since human infections with avian influenza A(H7N9) virus were first reported by the Chinese Center for Disease Control and Prevention (China CDC) in March 2013 (1), mainland China has experienced four influenza A(H7N9) virus epidemics. Prior investigations demonstrated that age and sex distribution, clinical features, and exposure history of A(H7N9) virus human infections reported during the first three epidemics were similar (2). In this report, epidemiology and virology data from the most recent, fourth epidemic (September 2015-August 2016) were compared with those from the three earlier epidemics...
December 16, 2016: MMWR. Morbidity and Mortality Weekly Report
keyword
keyword
3722
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"