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https://www.readbyqxmd.com/read/28636590/host-and-viral-traits-predict-zoonotic-spillover-from-mammals
#1
Kevin J Olival, Parviez R Hosseini, Carlos Zambrana-Torrelio, Noam Ross, Tiffany L Bogich, Peter Daszak
The majority of human emerging infectious diseases are zoonotic, with viruses that originate in wild mammals of particular concern (for example, HIV, Ebola and SARS). Understanding patterns of viral diversity in wildlife and determinants of successful cross-species transmission, or spillover, are therefore key goals for pandemic surveillance programs. However, few analytical tools exist to identify which host species are likely to harbour the next human virus, or which viruses can cross species boundaries. Here we conduct a comprehensive analysis of mammalian host-virus relationships and show that both the total number of viruses that infect a given species and the proportion likely to be zoonotic are predictable...
June 21, 2017: Nature
https://www.readbyqxmd.com/read/28636443/personal-protective-equipment-supply-chain-lessons-learned-from-recent-public-health-emergency-responses
#2
Anita Patel, Maryann M D'Alessandro, Karen J Ireland, W Greg Burel, Elaine B Wencil, Sonja A Rasmussen
Personal protective equipment (PPE) that protects healthcare workers from infection is a critical component of infection control strategies in healthcare settings. During a public health emergency response, protecting healthcare workers from infectious disease is essential, given that they provide clinical care to those who fall ill, have a high risk of exposure, and need to be assured of occupational safety. Like most goods in the United States, the PPE market supply is based on demand. The US PPE supply chain has minimal ability to rapidly surge production, resulting in challenges to meeting large unexpected increases in demand that might occur during a public health emergency...
May 2017: Health Security
https://www.readbyqxmd.com/read/28634155/perceptions-of-hiv-seriousness-risk-and-threat-among-online-samples-of-hiv-negative-men-who-have-sex-with-men-in-seven-countries
#3
Anna N Chard, Nicholas Metheny, Rob Stephenson
BACKGROUND: Rates of new HIV infections continue to increase worldwide among men who have sex with men (MSM). Despite effective prevention strategies such as condoms and pre-exposure prophylaxis (PrEP), low usage of both methods in many parts of the world hinder prevention efforts. An individual's perceptions of the risk of acquiring HIV and the seriousness they afford to seroconversion are important drivers of behavioral risk-taking. Understanding the behavioral factors suppressing the uptake of HIV prevention services is a critical step in informing strategies to improve interventions to combat the ongoing HIV pandemic among MSM...
June 20, 2017: JMIR Public Health and Surveillance
https://www.readbyqxmd.com/read/28633900/analytical-and-clinical-performance-of-a-chikungunya-qrt-pcr-for-central-and-south-america
#4
Thomas Edwards, Leticia Del Carmen Castillo Signor, Christopher Williams, Clément Larcher, Mauricio Espinel, Jane Theaker, Evelin Donis, Luis E Cuevas, Emily R Adams
Chikungunya was introduced into the Americas in 2015 causing a pandemic across the continent. Testing during the acute phase of infection relies on qRT-PCR, but available assays have a number of limitations. A qRT-PCR assay specific to the chikungunya E1 gene was designed using sequence data from contemporary strains. A probit analysis established the 95% limit of detection as 19.6 copies per reaction. We compared the assay with a US Centers for Disease Control (CDC) chikungunya qRT-PCR as the reference standard...
June 8, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28633891/aids-avian-flu-sars-mers-ebola-zika%C3%A2-what-next
#5
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/28633457/an-ha-stem-antibody-medi8852-prevents-and-controls-disease-and-limits-transmission-of-pandemic-influenza-viruses
#6
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/28632771/avian-influenza-in-latin-america-a-systematic-review-of-serological-and-molecular-studies-from-2000-2015
#7
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/28629986/identification-of-influenza-polymerase-inhibitors-targeting-polymerase-pb2-cap-binding-domain-through-virtual-screening
#8
Ming Liu, Edwin Chun-Yeung Lo, Guoxin Wang, Hak-Fun Chow, Jacky Chi-Ki Ngo, David Chi-Cheong Wan, Leo Lit-Man Poon, Pang-Chui Shaw
Influenza A virus is the major cause of epidemics and pandemics worldwide. In this study, virtual screening was used to identify compounds interacting with influenza A polymerase PB2 cap-binding domain (CBD). With a database of 21,351 small molecules, 28 candidate compounds were obtained and four of them (225, 225D1, 426 and 426Br) were found to bind directly to PB2 CBD by surface plasmon resonance (SPR). The evaluation of compounds 426Br and 225 indicated that they could bind to PB2 CBD and inhibit influenza virus at low micromolar concentration...
June 16, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28629756/nasal-colonization-of-staphylococcus-aureus-colonal-complex-5-prevalence-influencing-factors-and-phenotypic-and-molecular-characteristics-in-pregnant-chinese-women
#9
Jialing Lin, Chuanan Wu, Qianting Ou, Dongxin Lin, Ting Zhang, Chan Bai, Haoqu Zheng, Jiaping Ye, Xiaojie Wang, Ying Li, Xiaohua Ye, Zhenjiang Yao
BACKGROUND: Colonal complex 5 (CC5) has been referred to as the most pandemic community-associated Staphylococcus aureus in most Asian countries. However, few studies have focused on CC5 isolates in pregnant women. The aim of this study was to determine the prevalence and phenotypic and molecular characteristics of S aureus and methicillin-resistant S aureus (MRSA) CC5 nasal colonization in pregnant Chinese women. METHODS: We performed a cross-sectional study between August and November 2015 in 2 hospitals in Shenzhen, China...
June 16, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28624679/neuraminidase-based-recombinant-virus-like-particles-protect-against-lethal-avian-influenza-a-h5n1-virus-infection-in-ferrets
#10
Gale E Smith, Xiangjie Sun, Yaohui Bai, Ye V Liu, Michael J Massare, Melissa B Pearce, Jessica A Belser, Taronna R Maines, Hannah M Creager, Gregory M Glenn, David Flyer, Peter Pushko, Min Z Levine, Terrence M Tumpey
Avian influenza A (H5N1) viruses represent a growing threat for an influenza pandemic. The presence of widespread avian influenza virus infections further emphasizes the need for vaccine strategies for control of pre-pandemic H5N1 and other avian influenza subtypes. Influenza neuraminidase (NA) vaccines represent a potential strategy for improving vaccines against avian influenza H5N1 viruses. To evaluate a strategy for NA vaccination, we generated a recombinant influenza virus-like particle (VLP) vaccine comprised of the NA protein of A/Indonesia/05/2005 (H5N1) virus...
June 15, 2017: Virology
https://www.readbyqxmd.com/read/28624584/antibody-dependent-nk-cell-degranulation-as-a-marker-for-assessing-antibody-dependent-cytotoxicity-against-pandemic-2009-influenza-a-h1n1-infection-in-human-plasma-and-influenza-vaccinated-transchromosomic-bovine-intravenous-immunoglobulin-therapy
#11
Brian J Morrison, Jessica A Roman, Thomas C Luke, Nishith Nagabhushana, Kanakatte Raviprakash, Maya Williams, Peifang Sun
This study describes an antibody-dependent NK cell degranulation assay, as a biomarker to assess antibody-dependent cellular cytotoxicity (ADCC) response in influenza plasma and for antibody therapies against influenza infection. The concentration of neutralizing antibodies (NAbs) against the hemagglutinin receptor of influenza viruses is a current determinant in protection against infection, particularly following receipt of the seasonal influenza vaccine. However, this is a limited assessment of protection, because: (i) NAb titers that incur full protection vary; and (ii) NAb titers do not account for the entire breadth of antibody responses against viral infection...
June 14, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28622865/pa-x-protein-decreases-replication-and-pathogenicity-of-swine-influenza-virus-in-cultured-cells-and-mouse-models
#12
Xiao-Qian Gong, Ying-Feng Sun, Bao-Yang Ruan, Xiao-Min Liu, Qi Wang, Hai-Ming Yang, Shuai-Yong Wang, Peng Zhang, Xiu-Hui Wang, Tong-Ling Shan, Wu Tong, Yan-Jun Zhou, Guo-Xin Li, Hao Zheng, Guang-Zhi Tong, Hai Yu
Swine influenza viruses have been circulating in pigs throughout world and might be potential threats to human health. PA-X protein is a newly discovered protein produced from the PA gene by ribosomal frameshifting and the effects of PA-X on the 1918 H1N1, the pandemic 2009 H1N1, the highly pathogenic avian H5N1 and the avian H9N2 influenza viruses have been reported. However, the role of PA-X in the pathogenesis of swine influenza virus is still unknown. In this study, we rescued the H1N1 wild-type (WT) classical swine influenza virus (A/Swine/Guangdong/1/2011 (H1N1)) and H1N1 PA-X deficient virus containing mutations at the frameshift motif, and compared their replication properties and pathogenicity of swine influenza virus in vitro and in vivo...
June 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28622368/minimal-genetic-change-in-vibrio-cholerae-in-mozambique-over-time-multilocus-variable-number-tandem-repeat-analysis-and-whole-genome-sequencing
#13
Marcelino Garrine, Inácio Mandomando, Delfino Vubil, Tacilta Nhampossa, Sozinho Acacio, Shan Li, Joseph N Paulson, Mathieu Almeida, Daryl Domman, Nicholas R Thomson, Pedro Alonso, Oscar Colin Stine
Although cholera is a major public health concern in Mozambique, its transmission patterns remain unknown. We surveyed the genetic relatedness of 75 Vibrio cholerae isolates from patients at Manhiça District Hospital between 2002-2012 and 3 isolates from river using multilocus variable-number tandem-repeat analysis (MLVA) and whole genome sequencing (WGS). MLVA revealed 22 genotypes in two clonal complexes and four unrelated genotypes. WGS revealed i) the presence of recombination, ii) 67 isolates descended monophyletically from a single source connected to Wave 3 of the Seventh Pandemic, and iii) four clinical isolates lacking the cholera toxin gene...
June 16, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28622344/protecting-an-island-nation-from-extreme-pandemic-threats-proof-of-concept-around-border-closure-as-an-intervention
#14
Matt Boyd, Michael G Baker, Osman D Mansoor, Giorgi Kvizhinadze, Nick Wilson
BACKGROUND: Countries are well advised to prepare for future pandemic risks (e.g., pandemic influenza, novel emerging agents or synthetic bioweapons). These preparations do not typically include planning for complete border closure. Even though border closure may not be instituted in time, and can fail, there might still plausible chances of success for well organized island nations. OBJECTIVE: To estimate costs and benefits of complete border closure in response to new pandemic threats, at an initial proof-of-concept level...
2017: PloS One
https://www.readbyqxmd.com/read/28619700/integrated-detection-and-prediction-of-influenza-activity-for-real-time-surveillance-algorithm-design
#15
Armin Spreco, Olle Eriksson, Örjan Dahlström, Benjamin John Cowling, Toomas Timpka
BACKGROUND: Influenza is a viral respiratory disease capable of causing epidemics that represent a threat to communities worldwide. The rapidly growing availability of electronic "big data" from diagnostic and prediagnostic sources in health care and public health settings permits advance of a new generation of methods for local detection and prediction of winter influenza seasons and influenza pandemics. OBJECTIVE: The aim of this study was to present a method for integrated detection and prediction of influenza virus activity in local settings using electronically available surveillance data and to evaluate its performance by retrospective application on authentic data from a Swedish county...
June 15, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28617987/the-sex-selective-impact-of-the-black-death-and-recurring-plagues-in-the-southern-netherlands-1349-1450
#16
Daniel R Curtis, Joris Roosen
Although recent work has begun to establish that early modern plagues had selective mortality effects, it was generally accepted that the initial outbreak of Black Death in 1347-52 was a "universal killer." Recent bioarchaeological work, however, has argued that the Black Death was also selective with regard to age and pre-plague health status. The issue of the Black Death's potential sex selectivity is less clear. Bioarchaeological research hypothesizes that sex-selection in mortality was possible during the initial Black Death outbreak, and we present evidence from historical sources to test this notion...
June 15, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28617868/three-mutations-switch-h7n9-influenza-to-human-type-receptor-specificity
#17
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/28617223/coupling-effects-on-turning-points-of-infectious-diseases-epidemics-in-scale-free-networks
#18
Kiseong Kim, Sangyeon Lee, Doheon Lee, Kwang Hyung Lee
BACKGROUND: Pandemic is a typical spreading phenomenon that can be observed in the human society and is dependent on the structure of the social network. The Susceptible-Infective-Recovered (SIR) model describes spreading phenomena using two spreading factors; contagiousness (β) and recovery rate (γ). Some network models are trying to reflect the social network, but the real structure is difficult to uncover. METHODS: We have developed a spreading phenomenon simulator that can input the epidemic parameters and network parameters and performed the experiment of disease propagation...
May 31, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28616469/periodic-global-one-health-threats-update
#19
Leslie A Reperant, John MacKenzie, Albert D M E Osterhaus
Emerging infectious diseases continue to impose unpredictable burdens on global health and economy. Infectious disease surveillance and pandemic preparedness are essential to mitigate the impact of future threats. Global surveillance networks provide unprecedented monitoring data on plant, animal and human infectious diseases. Using such sources, we report on current major One Health threats and update on their epidemiological status.
December 2016: One Health
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
#20
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
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