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https://www.readbyqxmd.com/read/29071197/amplified-visual-immunosensor-integrated-with-nanozyme-for-ultrasensitive-detection-of-avian-influenza-virus
#1
Syed Rahin Ahmed, Juan C Corredor, Éva Nagy, Suresh Neethirajan
Nanomaterial-based artificial enzymes or nanozymes exhibit superior properties such as stability, cost effectiveness and ease of preparation in comparison to conventional enzymes. However, the lower catalytic activity of nanozymes limits their sensitivity and thereby practical applications in the bioanalytical field. To overcome this drawback, herein we propose a very simple but highly sensitive, specific and low-cost dual enhanced colorimetric immunoassay for avian influenza A (H5N1) virus. 3,3´,5,5´- Tetramethylbenzidine (TMBZ) was used as a reducing agent to produce gold nanoparticles (Au NPs) with blue colored solution from a viral target-specific antibody-gold ion mixture at first step...
2017: Nanotheranostics
https://www.readbyqxmd.com/read/28986672/high-accumulation-in-tobacco-seeds-of-hemagglutinin-antigen-from-avian-h5n1-influenza
#2
Yanaysi Ceballo, Kenia Tiel, Alina López, Gleysin Cabrera, Marlene Pérez, Osmany Ramos, Yamilka Rosabal, Carlos Montero, Rima Menassa, Ann Depicker, Abel Hernández
Tobacco seeds can be used as a cost effective system for production of recombinant vaccines. Avian influenza is an important respiratory pathogen that causes a high degree of mortality and becomes a serious threat for the poultry industry. A safe vaccine against avian flu produced at low cost could help to prevent future outbreaks. We have genetically engineered tobacco plants to express extracellular domain of hemagglutinin protein from H5N1 avian influenza virus as an inexpensive alternative for production purposes...
October 6, 2017: Transgenic Research
https://www.readbyqxmd.com/read/28931425/neutralizing-immune-responses-induced-by-oligomeric-h5n1-hemagglutinins-from-plants
#3
Hoang Trong Phan, Thuong Thi Ho, Ha Hoang Chu, Trang Huyen Vu, Ulrike Gresch, Udo Conrad
Plant-based transient expression is an alternative platform to produce hemagglutinin-based subunit vaccines. This production system provides not only fast and effective response in the context of a pandemic but also enables the supply of big volume vaccines at low cost. Crude plant extracts containing influenza hemagglutinin are considered to use as vaccine sources because of avoidance of related purification steps resulting in low cost production allowing veterinary applications. Highly immunogenic influenza hemagglutinins are urgently required to meet these pre-conditions...
September 20, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28900092/-impact-of-delivery-method-on-antiviral-activity-of-phosphodiester-phosphorothioate-and-phosphoryl-guanidine-oligonucleotides-in-mdck-cells-infected-with-h5n1-bird-flu-virus
#4
A S Levina, M N Repkova, B P Chelobanov, E V Bessudnova, N A Mazurkova, D A Stetsenko, V F Zarytova
We have previously described nanocomposites containing conjugates or complexes of native oligodeoxyribonucleotides with poly-L-lysine and TiO2 nanoparticles. We have shown that these nanocomposites efficiently suppressed influenza A virus reproduction in MDCK cells. Here, we have synthesized previously undescribed nanocomposites that consist of TiO2 nanoparticles and polylysine conjugates with oligonucleotides that contain phosphoryl guanidine or phosphorothioate internucleotide groups. These nanocomposites have been shown to exhibit antiviral activity in MDCK cells infected with H5N1 influenza A virus...
July 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28859269/optimized-clade-2-3-2-1c-h5n1-recombinant-vaccine-strains-against-highly-pathogenic-avian-influenza
#5
Jin-Wook Jang, Chung-Young Lee, Il-Hwan Kim, Jun-Gu Choi, Youn-Jeong Lee, Seong-Su Yuk, Ji-Ho Lee, Chang-Seon Song, Jae-Hong Kim, Hyuk-Joon Kwon
A/Puerto Rico/8/34 (PR8)-derived recombinant viruses have been used for seasonal flu vaccines; however, they are insufficient for vaccines against some human-fatal H5N1 highly pathogenic avian influenza (HPAI) viruses (HPAIV) due to low productivity. Additionally, the polymerase basic 2 (PB2) protein, an important mammalian-pathogenicity determinant, of PR8 possesses several mammalian-pathogenic mutations. We previously reported two avian PB2 genes (01310 and 0028) related to efficient replication in embryonated chicken eggs (ECEs) and nonpathogenicity in BALB/c mice...
August 31, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28738865/avian-influenza-h9n2-virus-isolated-from-air-samples-in-lpms-in-jiangxi-china
#6
Xiaoxu Zeng, Mingbin Liu, Heng Zhang, Jingwen Wu, Xiang Zhao, Wenbing Chen, Lei Yang, Fenglan He, Guoyin Fan, Dayan Wang, Haiying Chen, Yuelong Shu
BACKGROUND: Recently, avian influenza virus has caused repeated worldwide outbreaks in humans. Live Poultry Markets (LPMs) play an important role in the circulation and reassortment of novel Avian Influenza Virus (AIVs). Aerosol transmission is one of the most important pathways for influenza virus to spread among poultry, from poultry to mammals, and among mammals. METHODS: In this study, air samples were collected from LPMs in Nanchang city between April 2014 and March 2015 to investigate possible aerosol transmission of AIVs...
July 24, 2017: Virology Journal
https://www.readbyqxmd.com/read/28695835/the-concept-of-travel-medicine-and-the-actual-situation-of-travel-related-illnesses
#7
Varol Tunalı, Nevin Turgay
Travel medicine defines all diseases and medical situations that are related to travel. Travel medicine comprises infectious diseases, traumas, altitude sickness, sun burns, embolisms, jet lag, and many more travel-related situations. With the increasing possibility and ease of travel, the number of people who have travelled internationally has exceeded 1.13 billion in 2014, and the revenues of international travel have exceeded 1.25 trillion dollars. With every passing day, international travels are shifting toward the developing countries and to more exotic regions of the world, and travelers tend to be more adventurous and daring, thereby increasing risky behaviors during travels...
June 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/28633891/aids-avian-flu-sars-mers-ebola-zika%C3%A2-what-next
#8
REVIEW
Leslie A Reperant, Albert D M E Osterhaus
Emerging infections have threatened humanity since times immemorial. The dramatic anthropogenic, behavioral and social changes that have affected humanity and the environment in the past century have accelerated the intrusion of novel pathogens into the global human population, sometimes with devastating consequences. The AIDS and influenza pandemics have claimed and will continue to claim millions of lives. The recent SARS and Ebola epidemics have threatened populations across borders. The emergence of MERS may well be warning signals of a nascent pandemic threat, while the potential for geographical spread of vector-borne diseases, such as Zika, but also Dengue and Chikungunya is unprecedented...
June 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28632771/avian-influenza-in-latin-america-a-systematic-review-of-serological-and-molecular-studies-from-2000-2015
#9
REVIEW
Alejandra Afanador-Villamizar, Carlos Gomez-Romero, Andres Diaz, Julian Ruiz-Saenz
Avian influenza or bird flu is a highly contagious acute viral disease that can occur in epidemics and cross-border forms in poultry and wild birds. The characteristics of avian influenza viruses (AIVs) allow the emergence of new viral variants, some with zoonotic and pandemic potential. AIVs have been identified in Latin America; however, there is a lack of understanding of these viruses at the regional level. We performed a systematic literature review on serological or molecular evidence of AIVs circulation in Latin America...
2017: PloS One
https://www.readbyqxmd.com/read/28610552/a-fragile-assemblage-mutant-bird-flu-and-the-limits-of-risk-assessment
#10
Andrew Lakoff
This paper examines the recent public controversy sparked by the laboratory creation of a strain of highly pathogenic avian influenza transmissible among mammals. The contours of the controversy can be understood by tracking the assemblage of actors, institutions and devices gathered together in response to the governmental problem of how to manage emerging diseases. The grouping is tenuously held together by a shared commitment to the project of 'pandemic preparedness'. However, as the controversy unfolds, it becomes clear that the main actors involved do not share a common understanding of the problem to be addressed by pandemic preparedness, and the assemblage threatens to decompose...
June 2017: Social Studies of Science
https://www.readbyqxmd.com/read/28551451/a-sandwich-elisa-for-the-detection-of-neuraminidase-of-avian-influenza-a-h7n9-virus
#11
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
#12
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/28487229/every-member-of-the-kingdom-animalia-is-a-potential-vector-of-human-pathogens
#13
LETTER
Seema Patel
Zoonotic diseases are a subset of infectious diseases, which account for enormous morbidity and mortality. Pathologies like malaria, rabies, Lyme disease, leptospirosis, avian flu etc. are microbe- and parasite-caused ailments, where the etiological agents are introduced into or on the human body via ticks, mosquitoes, birds, rodents, bats, and deer, among other members of kingdom Animalia. While some of the zoonotic diseases are well-investigated and caution taken against, a lot many are yet to be recognized...
May 6, 2017: Microbial Pathogenesis
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
#14
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
#15
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/28179143/how-s-the-flu-getting-through-landscape-genetics-suggests-both-humans-and-birds-spread-h5n1-in-egypt
#16
Sean G Young, Margaret Carrel, Andrew Kitchen, George P Malanson, James Tamerius, Mohamad Ali, Ghazi Kayali
First introduced to Egypt in 2006, H5N1 highly pathogenic avian influenza has resulted in the death of millions of birds and caused over 350 infections and at least 117 deaths in humans. After a decade of viral circulation, outbreaks continue to occur and diffusion mechanisms between poultry farms remain unclear. Using landscape genetics techniques, we identify the distance models most strongly correlated with the genetic relatedness of the viruses, suggesting the most likely methods of viral diffusion within Egyptian poultry...
April 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28109709/the-effect-of-gamma-irradiation-conditions-on-the-immunogenicity-of-whole-inactivated-influenza-a-virus-vaccine
#17
Shannon C David, Josyane Lau, Eve V Singleton, Rachelle Babb, Justin Davies, Timothy R Hirst, Shaun R McColl, James C Paton, Mohammed Alsharifi
Gamma-irradiation, particularly an irradiation dose of 50kGy, has been utilised widely to sterilise highly pathogenic agents such as Ebola, Marburg Virus, and Avian Influenza H5N1. We have reported previously that intranasal vaccination with a gamma-irradiated Influenza A virus vaccine (γ-Flu) results in cross-protective immunity. Considering the possible inclusion of highly pathogenic Influenza strains in future clinical development of γ-Flu, an irradiation dose of 50kGy may be used to enhance vaccine safety beyond the internationally accepted Sterility Assurance Level (SAL)...
January 18, 2017: Vaccine
https://www.readbyqxmd.com/read/27872801/-beauty-contest-indicator-of-cognitive-ability-and-free-riding-strategies-results-from-a-scenario-experiment-about-pandemic-flu-immunization
#18
Björn Rönnerstrand
High immunization coverage rates are desirable in order to reduce total morbidity and mortality rates, but it may also provide an incentive for herd immunity free riding strategies. The aim of this paper was to investigate the link between cognitive ability and vaccination intention in a hypothetical scenario experiment about Avian Flu immunization. A between-subject scenario experiment was utilized to examine the willingness to undergo vaccination when the vaccination coverage was proclaimed to be 36, 62 and 88%...
March 2017: Preventive Medicine Reports
https://www.readbyqxmd.com/read/27741319/cross-neutralising-nanobodies-bind-to-a-conserved-pocket-in-the-hemagglutinin-stem-region-identified-using-yeast-display-and-deep-mutational-scanning
#19
Tiziano Gaiotto, Simon E Hufton
Cross-neutralising monoclonal antibodies against influenza hemagglutinin (HA) are of considerable interest as both therapeutics and diagnostic tools. We have recently described five different single domain antibodies (nanobodies) which share this cross-neutralising activity and suggest their small size, high stability, and cleft binding properties may present distinct advantages over equivalent conventional antibodies. We have used yeast display in combination with deep mutational scanning to give residue level resolution of positions in the antibody-HA interface which are crucial for binding...
2016: PloS One
https://www.readbyqxmd.com/read/27733806/socio-demographic-study-on-extent-of-knowledge-awareness-attitude-and-risks-of-zoonotic-diseases-among-livestock-owners-in-puducherry-region
#20
K Rajkumar, A Bhattacharya, S David, S Hari Balaji, R Hariharan, M Jayakumar, N Balaji
AIM: This study was conducted to assess the extent of knowledge, awareness, attitude, and risks of zoonotic diseases among livestock owners in Puducherry region. MATERIALS AND METHODS: A total of 250 livestock farmers were selected randomly from eight revenue villages. And each farmer was interviewed with a questionnaire containing both open- and close-ended questions on various aspects of zoonotic diseases, a total of 49 questionnaires were framed to assess the source and transmission of infection to the farmers and to test their knowledge and awareness about zoonotic diseases...
September 2016: Veterinary World
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