keyword
MENU ▼
Read by QxMD icon Read
search

H7N9

keyword
https://www.readbyqxmd.com/read/28637471/enhanced-humoural-and-cellular-immune-responses-to-influenza-h7n9-antigen-ha1-2-fused-with-flagellin-in-chickens
#1
Li Song, Dan Xiong, Maozhi Hu, Xilong Kang, Zhiming Pan, Xinan Jiao
BACKGROUND: Sudden increases in the number of human A (H7N9) cases reported during December and January have been observed in previous years. Most reported infection cases are due to prior exposure to live poultry or potentially contaminated environments. Low pathogenicity of influenza A (H7N9) virus in avian species complicates timely discovery of infected birds. Therefore, there is a pressing need to develop safe and effective anti-H7N9 vaccines for poultry to reduce the risk of human infection and prevent the emergence of novel mutated strains...
June 21, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28633457/an-ha-stem-antibody-medi8852-prevents-and-controls-disease-and-limits-transmission-of-pandemic-influenza-viruses
#2
C I Paules, S Lakdawala, J M McAuliffe, M Paskel, L Vogel, N L Kallewaard, Q Zhu, K Subbarao
Background: MEDI8852 is a novel MAb which neutralizes both group I and group II influenza A viruses (IAV) in vitro. We evaluated whether MEDI8852 was effective for prophylaxis and therapy against representative group I (H5N1) and group II (H7N9) pandemic IAV in mice and ferrets and could be used to block transmission of influenza H1N1pdm09 in ferrets, compared to an irrelevant control MAb R347 and oseltamivir. Results: MEDI8852 was effective for prophylaxis and treatment of H7N9 and H5N1 infection in mice, with a clear dose-dependent response and treatment with MEDI8852 24, 48 or 72 h post-infection (hpi) was superior to oseltamivir for H5N1...
June 17, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28624926/limited-awareness-of-animal-influenza-prevention-and-control-among-dai-lue-smallholder-farmers-in-southwest-china
#3
Xiang Zhao, Gareth Davey
Awareness of animal influenza and its prevention and control is important for ensuring livestock health, production and welfare. In China, a country stereotyped as a major source of emerging zoonotic infectious diseases, research on the public understanding of animal influenza is limited to the Han, the main ethnic group. The present qualitative study in Southwest China investigated awareness of animal influenza among the Dai, an ethnic minority. The participants (15 men and 10 women, ages 18-83) were smallholder farmers of pigs and poultry in rural areas of Jinghong, Xishuangbanna, Yunnan Province...
June 17, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28617868/three-mutations-switch-h7n9-influenza-to-human-type-receptor-specificity
#4
Robert P de Vries, Wenjie Peng, Oliver C Grant, Andrew J Thompson, Xueyong Zhu, Kim M Bouwman, Alba T Torrents de la Pena, Marielle J van Breemen, Iresha N Ambepitiya Wickramasinghe, Cornelis A M de Haan, Wenli Yu, Ryan McBride, Rogier W Sanders, Robert J Woods, Monique H Verheije, Ian A Wilson, James C Paulson
The avian H7N9 influenza outbreak in 2013 resulted from an unprecedented incidence of influenza transmission to humans from infected poultry. The majority of human H7N9 isolates contained a hemagglutinin (HA) mutation (Q226L) that has previously been associated with a switch in receptor specificity from avian-type (NeuAcα2-3Gal) to human-type (NeuAcα2-6Gal), as documented for the avian progenitors of the 1957 (H2N2) and 1968 (H3N2) human influenza pandemic viruses. While this raised concern that the H7N9 virus was adapting to humans, the mutation was not sufficient to switch the receptor specificity of H7N9, and has not resulted in sustained transmission in humans...
June 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28615930/prevention-of-influenza-a-h7n9-and-bacterial-infections-in-mice-using-intranasal-immunization-with-live-influenza-vaccine-and-the-group-b-streptococcus-recombinant-polypeptides
#5
Yulia A Desheva, Galina F Leontieva, Tatiana A Kramskaya, Tatiana A Smolonogina, Kornelia B Grabovskaya, Galina O Landgraf, Vadim E Karev, Alexander N Suvorov, Larisa G Rudenko
We investigate the protective effect of combined vaccination based on live attenuated influenza vaccine (LAIV) and group B streptococcus (GBS) recombinant polypeptides against potential pandemic H7N9 influenza infection followed by GBS burden. Mice were intranasally immunized using 107 50% egg infectious dose (EID50) of H7N3 LAIV, the mix of the 4 GBS peptides (group B streptococcus vaccine [GBSV]), or combined LAIV + GBSV vaccine. The LAIV raised serum hemagglutination-inhibition antibodies against H7N9 in higher titers than against H7N3...
2017: Virology: Research and Treatment
https://www.readbyqxmd.com/read/28612264/application-of-recombinant-hemagglutinin-proteins-as-alternative-antigen-standards-for-pandemic-influenza-vaccines
#6
Yejin Choi, Seong Yi Kwon, Ho Jung Oh, Sunbo Shim, Seokkee Chang, Hye Joo Chung, Do Keun Kim, Younsang Park, Younghee Lee
OBJECTIVES: The single radial immunodiffusion (SRID) assay, used to quantify hemagglutinin (HA) in influenza vaccines, requires reference reagents; however, because centralized production of reference reagents may slow the emergency deployment of vaccines, alternatives are needed. RESULTS: We investigated the production of HA proteins using recombinant DNA technology, rather than a traditional egg-based production process. The HA proteins were then used in an SRID assay as a reference antigen...
June 13, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28611246/inhibition-of-avian-influenza-a-virus-replication-in-human-cells-by-host-restriction-factor-tufm-is-correlated-with-autophagy
#7
Shu-Ming Kuo, Chi-Jene Chen, Shih-Cheng Chang, Tzu-Jou Liu, Yi-Hsiang Chen, Sheng-Yu Huang, Shin-Ru Shih
Avian influenza A viruses generally do not replicate efficiently in human cells, but substitution of glutamic acid (Glu, E) for lysine (Lys, K) at residue 627 of avian influenza virus polymerase basic protein 2 (PB2) can serve to overcome host restriction and facilitate human infectivity. Although PB2 residue 627 is regarded as a species-specific signature of influenza A viruses, host restriction factors associated with PB2627E have yet to be fully investigated. We conducted immunoprecipitation, followed by differential proteomic analysis, to identify proteins associating with PB2627K (human signature) and PB2627E (avian signature) of influenza A/WSN/1933(H1N1) virus, and the results indicated that Tu elongation factor, mitochondrial (TUFM), had a higher binding affinity for PB2627E than PB2627K in transfected human cells...
June 13, 2017: MBio
https://www.readbyqxmd.com/read/28583579/the-changing-landscape-of-a-h7n9-influenza-virus-infections-in-china
#8
Richard J Webby, Zifeng Yang
No abstract text is available yet for this article.
June 2, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28583578/epidemiology-of-avian-influenza-a-h7n9-virus-in-human-beings-across-five-epidemics-in-mainland-china-2013-17-an-epidemiological-study-of-laboratory-confirmed-case-series
#9
Xiling Wang, Hui Jiang, Peng Wu, Timothy M Uyeki, Luzhao Feng, Shengjie Lai, Lili Wang, Xiang Huo, Ke Xu, Enfu Chen, Xiaoxiao Wang, Jianfeng He, Min Kang, Renli Zhang, Jin Zhang, Jiabing Wu, Shixiong Hu, Hengjiao Zhang, Xiaoqing Liu, Weijie Fu, Jianming Ou, Shenggen Wu, Ying Qin, Zhijie Zhang, Yujing Shi, Juanjuan Zhang, Jean Artois, Vicky J Fang, Huachen Zhu, Yi Guan, Marius Gilbert, Peter W Horby, Gabriel M Leung, George F Gao, Benjamin J Cowling, Hongjie Yu
BACKGROUND: The avian influenza A H7N9 virus has caused infections in human beings in China since 2013. A large epidemic in 2016-17 prompted concerns that the epidemiology of the virus might have changed, increasing the threat of a pandemic. We aimed to describe the epidemiological characteristics, clinical severity, and time-to-event distributions of patients infected with A H7N9 in the 2016-17 epidemic compared with previous epidemics. METHODS: In this epidemiological study, we obtained information about all laboratory-confirmed human cases of A H7N9 virus infection reported in mainland China as of Feb 23, 2017, from an integrated electronic database managed by the China Center for Disease Control and Prevention (CDC) and provincial CDCs...
June 2, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28580900/preliminary-epidemiology-of-human-infections-with-highly-pathogenic-avian-influenza-a-h7n9-virus-china-2017
#10
Lei Zhou, Yi Tan, Min Kang, Fuqiang Liu, Ruiqi Ren, Yali Wang, Tao Chen, Yiping Yang, Chao Li, Jie Wu, Hengjiao Zhang, Dan Li, Carolyn M Greene, Suizan Zhou, A Danielle Iuliano, Fiona Havers, Daxin Ni, Dayan Wang, Zijian Feng, Timothy M Uyeki, Qun Li
We compared the characteristics of cases of highly pathogenic avian influenza (HPAI) and low pathogenic avian influenza (LPAI) A(H7N9) virus infections in China. HPAI A(H7N9) case-patients were more likely to have had exposure to sick and dead poultry in rural areas and were hospitalized earlier than were LPAI A(H7N9) case-patients.
August 17, 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28580899/human-infection-with-highly-pathogenic-avian-influenza-a-h7n9-virus-china
#11
Changwen Ke, Chris Ka Pun Mok, Wenfei Zhu, Haibo Zhou, Jianfeng He, Wenda Guan, Jie Wu, Wenjun Song, Dayan Wang, Jiexiong Liu, Qinhan Lin, Daniel Ka Wing Chu, Lei Yang, Nanshan Zhong, Zifeng Yang, Yuelong Shu, Joseph Sriyal Malik Peiris
The recent increase in zoonotic avian influenza A(H7N9) disease in China is a cause of public health concern. Most of the A(H7N9) viruses previously reported have been of low pathogenicity. We report the fatal case of a patient in China who was infected with an A(H7N9) virus having a polybasic amino acid sequence at its hemagglutinin cleavage site (PEVPKRKRTAR/GL), a sequence suggestive of high pathogenicity in birds. Its neuraminidase also had R292K, an amino acid change known to be associated with neuraminidase inhibitor resistance...
July 17, 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28555543/broad-spectrum-inhibition-of-common-respiratory-rna-viruses-by-a-pyrimidine-synthesis-inhibitor-with-involvement-of-the-host-antiviral-response
#12
Nam Nam Cheung, Kin Kui Lai, Jun Dai, Kin Hang Kok, Honglin Chen, Kwok-Hung Chan, Kwok-Yung Yuen, Richard Yi Tsun Kao
Our previous screening of 50 240 structurally diverse compounds led to the identification of 39 influenza A virus infection inhibitors (Kao R.Y., Yang D., Lau L.S., Tsui W.H., Hu L. et al. Nat Biotechnol 2010;28:600-605). Further screening of these compounds against common respiratory viruses led to the discovery of compound FA-613. This inhibitor exhibited low micromolar antiviral activity against various influenza A and B virus strains, including the highly pathogenic influenza A strains H5N1 and H7N9, enterovirus A71, respiratory syncytial virus, human rhinovirus A, SARS- and MERS-coronavirus...
May 30, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28555541/avian-influenza-virus-a-h7n9-infects-multiple-mononuclear-cell-types-in-peripheral-blood-and-induces-dysregulated-cytokine-responses-and-apoptosis-in-infected-monocytes
#13
Andrew C Y Lee, Kelvin K W To, Houshun Zhu, Hin Chu, Can Li, Winger W N Mak, Anna J X Zhang, Kwok-Yung Yuen
Most patients with avian influenza A H7N9 virus (H7N9) infection suffer from severe illness, accompanied by dysregulated cytokine/chemokine response, delayed viral clearance and impaired neutralizing antibody response. Here, we evaluated the role of peripheral blood mononuclear cells (PBMCs) in the pathogenesis of H7N9 infection using an ex vivo infection model. H7N9 infected a significantly higher percentage of PBMCs (23.9 %) than those of avian influenza A H5N1 virus (H5N1) (12.3 %) and pandemic H1N1 virus (pH1N1) (5...
May 30, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28551451/a-sandwich-elisa-for-the-detection-of-neuraminidase-of-avian-influenza-a-h7n9-virus
#14
Yueyang Yu, Xi Zhang, Baihui Zhao, Ying Sun, Xiaoguang Zhang, Tian Bai, Jian Lu, Zi Li, Liqi Liu, Dayan Wang, Yuelong Shu, Jianfang Zhou, Kun Qin
Although exhibiting no or low virulence in poultry, avian influenza virus H7N9 has caused around 1400 confirmed human infections in China with a case-fatality rate of 30% since 2013. A highly pathogenic H7N9 virus (HP-H7), with the HA antigenicity distinct from the previous, were recently detected in patients and poultry. Therefore, convenient rapid diagnosis with reliability will allow early antiviral use and management for H7N9 infection. Here, a sandwich ELISA targeting the conserved viral antigen, neuraminidase (NA) was developed...
May 25, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28549473/attitudes-of-consumers-and-live-poultry-workers-to-central-slaughtering-in-controlling-h7n9-a-cross-sectional-study
#15
Xiao Lin, Dingmei Zhang, Xinwei Wang, Yun Huang, Zhicheng Du, Yaming Zou, Jiahai Lu, Yuantao Hao
BACKGROUND: Guangdong Province in the Pearl River Delta of Southeast China is among the areas in the country with the highest rates of avian flu cases. In order to control the outbreak of human-infected H7N9 cases, Guangdong launched a new policy on the central slaughtering of live poultry in 2015. This study aims to evaluate attitudes of consumers and live-poultry workers toward the policy. The live-poultry workers consisted of two sub-groups: live-poultry traders and poultry farm workers...
May 26, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28539661/the-pb2-mutation-with-lysine-at-627-enhances-the-pathogenicity-of-avian-influenza-h7n9-virus-which-belongs-to-a-non-zoonotic-lineage
#16
Weixuan Li, Horace Hok Yeung Lee, Run Feng Li, Huachen Maria Zhu, Guan Yi, Joseph Sriyal Malik Peiris, Zi Feng Yang, Chris Ka Pun Mok
A novel avian-origin influenza A (H7N9) virus emerged in China in 2013 and has caused zoonotic disease in over 1123 persons with an overall mortality around 30%. Amino acid changes at the residues 591, 627 and 701 of polymerase basic protein 2 (PB2) have been found frequently in the human H7N9 isolates but not in viruses isolated from avian species. We have recently identified a cluster of H7N9 viruses in ducks which circulated in China prior to the first recognition of zoonotic disease in 2013. These duck viruses have genetic background distinct from the zoonotic H7N9 lineage...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28537546/biological-characterisation-of-the-emerged-highly-pathogenic-avian-influenza-hpai-a-h7n9-viruses-in-humans-in-mainland-china-2016-to-2017
#17
Wenfei Zhu, Jianfang Zhou, Zi Li, Lei Yang, Xiyan Li, Weijuan Huang, Sumei Zou, Wenbing Chen, Hejiang Wei, Jing Tang, Liqi Liu, Jie Dong, Dayan Wang, Yuelong Shu
With no or low virulence in poultry, avian influenza A(H7N9) virus has caused severe infections in humans. In the current fifth epidemic wave, a highly pathogenic avian influenza (HPAI) H7N9 virus emerged. The insertion of four amino acids (KRTA) at the haemagglutinin (HA) cleavage site enabled trypsin-independent infectivity of this virus. Although maintaining dual receptor-binding preference, its HA antigenicity was distinct from low-pathogenic avian influenza A(H7N9). The neuraminidase substitution R292K conferred a multidrug resistance phenotype...
May 11, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28532182/tackling-a-novel-lethal-virus-a-focus-on-h7n9-vaccine-development
#18
Irina Isakova-Sivak, Larisa Rudenko
Avian-origin H7N9 influenza viruses first detected in humans in China in 2013 continue to cause severe human infections with a mortality rate close to 40%. These viruses are acknowledged as the subtype most likely to cause the next influenza pandemic. Areas covered: Here we review published data on the development of H7N9 influenza vaccine candidates and their evaluation in preclinical and clinical trials identified on PubMed database with the term 'H7N9 influenza vaccine'. In addition, a search with the same term was done on ClinicalTrials...
July 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28524040/-a-case-of-the-severe-human-infection-by-avian-influenza-h7n9-was-rescued-successfully-by-the-sepsis-bundle
#19
Shaohong Wang, Jintao Liu, Haili Luo, Xianguo Pan, Tongmei Yuan, Xuemei Long
One confirmed diagnosis case of severe human infection by avian influenza H7N9 admitted to intensive care unit (ICU) of the Second Affiliated Hospital of Guizhou Medical University on January 12th, 2017 was reported. The patient was treated with the sepsis bundle, and recovered finally, including a series of comprehensive treatments, such as respiratory support, circulation support, antiviral, anti-inflammation, immunization enhancement, critical nursing, fluid management, nutritional support and treatment of complications...
May 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28521760/avian-influenza-a-h7n9-risk-perception-information-trust-and-adoption-of-protective-behaviours-among-poultry-farmers-in-jiangsu-province-china
#20
Bin Cui, Qiuyan Liao, Wendy Wing Tak Lam, Zong Ping Liu, Richard Fielding
BACKGROUND: Poultry farmers are at high-risk from avian influenza A/H7N9 infection due to sustained occupational exposures to live poultry. This study examined factors associated with poultry farmers' adoption of personal protective behaviours (PPBs) based on Protection Motivation Theory (PMT). METHODS: Totally, 297 poultry farmers in three cities of Jiangsu Province, China were interviewed during November 2013-January 2014. Data on PMT constructs, perceived trustworthiness of A/H7N9 information from mass media (formal sources), friends and family (informal sources), intention to adopt and actual adoption of PPBs and respondents' demographics were collected...
May 18, 2017: BMC Public Health
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"