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https://www.readbyqxmd.com/read/28729702/structure-of-general-population-antibody-titer-distributions-to-influenza-a-virus
#1
Nguyen Thi Duy Nhat, Stacy Todd, Erwin de Bruin, Tran Thi Nhu Thao, Nguyen Ha Thao Vy, Tran Minh Quan, Dao Nguyen Vinh, Janko van Beek, Pham Hong Anh, Ha Minh Lam, Nguyen Thanh Hung, Nguyen Thi Le Thanh, Huynh Le Anh Huy, Vo Thi Hong Ha, Stephen Baker, Guy E Thwaites, Nguyen Thi Nam Lien, Tran Thi Kim Hong, Jeremy Farrar, Cameron P Simmons, Nguyen Van Vinh Chau, Marion Koopmans, Maciej F Boni
Seroepidemiological studies aim to understand population-level exposure and immunity to infectious diseases. Their results are normally presented as binary outcomes describing the presence or absence of pathogen-specific antibody, despite the fact that many assays measure continuous quantities. A population's natural distribution of antibody titers to an endemic infectious disease may include information on multiple serological states - naiveté, recent infection, non-recent infection, childhood infection - depending on the disease in question and the acquisition and waning patterns of immunity...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729020/purification-of-cell-culture-derived-influenza-a-virus-via-continuous-anion-exchange-chromatography-on-monoliths
#2
Laura M Fischer, Michael W Wolff, Udo Reichl
The continuously increasing demand for potent and safe vaccines and the intensifying economic pressure on health care systems underlines the need for further optimization of vaccine manufacturing. Here, we focus on downstream processing of human influenza vaccines, investigating the purification of serum-free cell culture-derived influenza virus (A/PR/8/34 H1N1) using continuous chromatography. Therefore, quaternary amine anion exchange monoliths (CIM® QA) were characterized for their capacity to capture virus particles from animal cells cultivated in different media and their ability to separate virions from contaminating host cell proteins and DNA...
July 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28726598/pandemic-related-health-behavior-repeat-episodes-of-influenza-like-illness-related-to-the-2009-h1n1-influenza-pandemic
#3
O Mgbere, K Ngo, S Khuwaja, M Mouzoon, A Greisinger, R Arafat, J Markee
The Houston Health Department (HHD) in Texas tracks influenza-like illness (ILI) in the community through its Influenza Sentinel Surveillance Program, which began in 2008. After the influenza A(H1N1) pandemic (pH1N1) in 2009, investigators sought to assess the feasibility of this program as a non-traditional data source for tracking and monitoring care-seeking activities. Through the process of characterizing and describing patients who had 'return visits', or who were considered the heaviest ILI-related care-utilizers, the investigators sought to understand the strengths and limitations of this data source...
July 20, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28724768/synthetic-tlr4-and-tlr7-ligands-work-additively-via-myd88-to-induce-protective-antiviral-immunity-in-mice
#4
Peter H Goff, Tomoko Hayashi, Wenqian He, Shiyin Yao, Howard B Cottam, Gene S Tan, Brian Crain, Florian Krammer, Karen Messer, Minya Pu, Dennis A Carson, Peter Palese, Maripat Corr
We have previously demonstrated that the combination of synthetic small molecule Toll-like receptor 4 (TLR4) and TLR7 ligands is a potent adjuvant for recombinant influenza virus hemagglutinin, inducing rapid and sustained immunity protective against influenza viruses in homologous, heterologous and heterosubtypic murine challenge models. Combining TLR4 and TLR7 ligands balances Th1/Th2-type immune responses for long-lived cellular and neutralizing humoral immunity against the viral hemagglutinin. Here, we demonstrate that the protective response induced in mice by this combined adjuvant is dependent upon TLR4 and TLR7 signaling via myeloid differentiation primary response gene 88 (MyD88), indicating that the adjuvants function in vivo via their known receptors with negligible off-target effects to induce protective immunity...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28723925/immunologic-response-to-vaccine-challenge-in-pregnant-ptpn22-r620w-carriers-and-non-carriers
#5
Shelly H Tien, Juliet N Crabtree, Heather L Gray, Erik J Peterson
OBJECTIVES: Influenza infection is a significant cause of respiratory morbidity among pregnant women. Seasonal influenza vaccination engages innate immune receptors to promote protective immunity. A coding polymorphism (R620W) in PTPN22 imparts elevated risk for human infection and autoimmune disease, predisposes to diminished innate immune responses, and associates with reduced immunization responses. We sought to quantify the effects of PTPN22-R620W on humoral and cell-mediated immune responses to the inactivated influenza vaccine among healthy pregnant women...
2017: PloS One
https://www.readbyqxmd.com/read/28720851/microneedle-patch-delivery-of-influenza-vaccine-during-pregnancy-enhances-maternal-immune-responses-promoting-survival-and-long-lasting-passive-immunity-to-offspring
#6
E Stein Esser, Joanna A Pulit-Penaloza, Haripriya Kalluri, Devin McAllister, Elena V Vassilieva, Elizabeth Q Littauer, Nadia Lelutiu, Mark R Prausnitz, Richard W Compans, Ioanna Skountzou
Influenza virus causes life-threatening infections in pregnant women and their newborns. Immunization during pregnancy is the most effective means of preventing maternal and infant mortality/morbidity; however, influenza vaccination rates of pregnant women remain under 50%. Furthermore, the availability of vaccines in low-resource populations is limited. Skin immunization with microneedle patches (MN) is a novel and safe vaccination platform featuring thermostable vaccine formulations. Cold-chain independence and the potential for self-administration can expand influenza vaccination coverage in developing countries...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28718801/from-variation-of-influenza-viral-proteins-to-vaccine-development
#7
REVIEW
Wandi Zhu, Chao Wang, Bao-Zhong Wang
Recurrent influenza epidemics and occasional pandemics are one of the most important global public health concerns and are major causes of human morbidity and mortality. Influenza viruses can evolve through antigen drift and shift to overcome the barriers of human immunity, leading to host adaption and transmission. Mechanisms underlying this viral evolution are gradually being elucidated. Vaccination is an effective method for the prevention of influenza virus infection. However, the emergence of novel viruses, including the 2009 pandemic influenza A (H1N1), the avian influenza A virus (H7N9), and the highly pathogenic avian influenza A virus (HPAI H5N1), that have infected human populations frequently in recent years reveals the tremendous challenges to the current influenza vaccine strategy...
July 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28716554/calcium-phosphate-nanoparticle-capnp-for-dose-sparing-of-inactivated-whole-virus-pandemic-influenza-a-h1n1-2009-vaccine-in-mice
#8
Tülin Morçӧl, Brett L Hurst, E Bart Tarbet
The emergence of pandemic influenza strains, particularly the reemergence of the swine-derived influenza A (H1N1) in 2009, is reaffirmation that influenza viruses are very adaptable and influenza remains as a significant global public health treat. As recommended by the World Health Organization (WHO), the use of adjuvants is an attractive approach to improve vaccine efficacy and allow dose-sparing during an influenza emergency. In this study, we utilized CaPtivate Pharmaceutical's proprietary calcium phosphate nanoparticles (CaPNP) vaccine adjuvant and delivery platform to formulate an inactivated whole virus influenza A/CA/04/2009 (H1N1pdm) vaccine as a potential dose-sparing strategy...
July 14, 2017: Vaccine
https://www.readbyqxmd.com/read/28715468/heterosubtypic-cross-reactivity-of-ha1-antibodies-to-influenza-a-with-emphasis-on-nonhuman-subtypes-h5n1-h7n7-h9n2
#9
Dennis E Te Beest, Erwin de Bruin, Sandra Imholz, Marion Koopmans, Michiel van Boven
Epidemics of influenza A vary greatly in size and age distribution of cases, and this variation is attributed to varying levels of pre-existing immunity. Recent studies have shown that antibody-mediated immune responses are more cross-reactive than previously believed, and shape patterns of humoral immunity to influenza A viruses over long periods. Here we quantify antibody responses to the hemagglutinin subunit 1 (HA1) across a range of subtypes using protein microarray analysis of cross-sectional serological surveys carried out in the Netherlands before and after the A/2009 (H1N1) pandemic...
2017: PloS One
https://www.readbyqxmd.com/read/28715152/demographic-and-ecological-risk-factors-for-human-influenza-a-virus-infections-in-rural-indonesia
#10
Elisabeth Dowling Root, Dwi Agustian, Cissy Kartasasmita, Timothy M Uyeki, Eric A F Simões
BACKGROUND: Indonesia has the world's highest reported mortality for human infections with highly pathogenic avian influenza (HPAI) A(H5N1) virus. Indonesia is an agriculturally-driven country where human-animal mixing is common and provides a unique environment for zoonotic influenza A virus transmission. OBJECTIVES: To identify potential demographic and ecological risk factors for human infection with seasonal influenza A viruses in rural Indonesia, a population-based study was conducted in Cileunyi and Soreang sub-districts near Bandung in western Java from 2008 to 2011...
July 17, 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/28714491/molecular-epidemiology-and-antigenic-characterization-of-seasonal-influenza-viruses-circulating-in-nepal
#11
B P Upadhyay, P Ghimire, M Tashiro, M R Banjara
BACKGROUND: Influenza is one of the public health burdens in Nepal and its epidemiology is not clearly understood. The objective of this study was to explore the molecular epidemiology and the antigenic characteristics of the circulating influenza viruses in Nepal. METHODS: A total of 1495 throat swab specimens were collected from January to December, 2014. Real time PCR assay was used for identification of influenza virus types and subtypes. Ten percent of the positive specimens were randomly selected and inoculated onto Madin-Darby Canine Kidney Epithelial cells (MDCK) for influenza virus isolation...
January 2017: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/28714069/discriminant-biomarkers-of-acute-respiratory-distress-syndrome-associated-to-h1n1-influenza-identified-by-metabolomics-hplc-qtof-ms-ms-platform
#12
Alessia Ferrarini, Laura Righetti, Ma Paz Martínez, Mariano Fernández, Annalaura Mastrangelo, Juan P Horcajada, Antoni Betbesé, Andrés Esteban, Jordi Ordóñez, Joaquín de Gea, Jesús Ruiz Cabello, Federica Pellati, José A Lorente, Nicolás Nin, Francisco J Rupérez
Acute Respiratory Distress Syndrome (ARDS) is a serious complication of influenza A (H1N1) virus infection. Its pathogenesis is unknown, and biomarkers are lacking. Untargeted metabolomics allows the analysis of the whole metabolome in a biological compartment, identifying patterns associated with specific conditions. We hypothesized that LC-MS could help identify discriminant metabolites able to define the metabolic alterations occurring in patients with influenza A (H1N1) virus infection that developed ARDS...
July 17, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28713494/caspase-3-role-and-immunohistochemical-expression-in-assessment-of-apoptosis-as-a-feature-of-h1n1-vaccine-caused-drug-induced-liver-injury-dili
#13
Abir Khalil Mohamed, Mona Magdy
BACKGROUND: Drug-Induced Liver Injury (DILI) changes, occur post exposure to natural or chemical compounds including apoptosis. AIM: To assess the H1N1 vaccine-caused DILI by histochemical and immunohistochemical methods. METHODS: This 2014's experimental study was conducted on 70 albino rats. They were given Arepanrix(TM) H1N1 vaccine and were divided into 7 groups; 10 mice each, as control (non-vaccinated), vac2 and vac4 injected with 1(st) and 2(nd) doses of vaccine (suspension only) and euthanized after 3 weeks each, vac5 euthanized 6 weeks after 2(nd) dose, mix2 and mix4 injected with 1(st) and 2(nd) doses of vaccine (mixture of suspension and adjuvant) and euthanized after 3 weeks each, mix5 and euthanized 6 weeks after 2(nd) dose...
May 2017: Electronic Physician
https://www.readbyqxmd.com/read/28712489/plant-made-virus-like-particles-bearing-influenza-hemagglutinin-ha-recapitulate-early-interactions-of-native-influenza-virions-with-human-monocytes-macrophages
#14
Alexander I Makarkov, Sabrina Chierzi, Stéphane Pillet, Keith K Murai, Nathalie Landry, Brian J Ward
INTRODUCTION: Plant-made virus-like particles (VLP) bearing influenza virus hemagglutinins (HA) are novel vaccine candidates that induce cross-reactive humoral and poly-functional T cell responses. To better understand the mechanisms that underlie this broad immunogenicity we studied early interactions of VLPs bearing either H1 (A/California/07/2009 (H1N1)) or H5 (A/Indonesia/05/2005 (H5N1)) with a human monocytoid cell line (U-937 cells) and human monocyte-derived macrophages (MDMs) as model antigen-presenting cells (APC)...
July 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28709902/duration-of-fever-and-other-symptoms-after-the-inhalation-of-laninamivir-octanoate-hydrate-comparison-of-the-2011-12-to-2015-16-japanese-influenza-seasons
#15
Hideyuki Ikematsu, Naoki Kawai, Norio Iwaki, Seizaburo Kashiwagi
The duration of fever and symptoms after laninamivir octanoate hydrate (laninamivir) inhalation were investigated in the Japanese 2015/16 influenza season, and the results were compared with those of the 2011/12 to 2014/15 seasons. A total of 1068 patients were evaluated for the duration of fever and symptoms in the five studied seasons. The influenza types/subtypes were 125 A(H1N1)pdm09 (62.2%), 17 A(H3N2) (8.5%), and 59 B (29.4%) in the 2015/16 season. The median durations of fever were 40.0, 41.0, and 47...
July 11, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28709555/repeated-seasonal-influenza-vaccination-among-elderly-in-europe-effects-on-laboratory-confirmed-hospitalised-influenza
#16
Marc Rondy, Odile Launay, Jesus Castilla, Simona Costanzo, Joan Puig-Barberà, Giedre Gefenaite, Amparo Larrauri, Caterina Rizzo, Daniela Pitigoi, Ritva K Syrjänen, Ausenda Machado, Sanja Kurečić Filipović, Judit Krisztina Horváth, Iwona Paradowska-Stankiewicz, Sierk Marbus, Alain Moren
In Europe, annual influenza vaccination is recommended to elderly. From 2011 to 2014 and in 2015-16, we conducted a multicentre test negative case control study in hospitals of 11 European countries to measure influenza vaccine effectiveness (IVE) against laboratory confirmed hospitalised influenza among people aged ≥65years. We pooled four seasons data to measure IVE by past exposures to influenza vaccination. We swabbed patients admitted for clinical conditions related to influenza with onset of severe acute respiratory infection ≤7days before admission...
August 3, 2017: Vaccine
https://www.readbyqxmd.com/read/28709460/semi-quantitative-influenza-a-population-averages-from-a-multiplex-respiratory-viral-panel-rvp-potential-for-reflecting-target-sequence-changes-affecting-the-assay
#17
Kenneth H Rand, Maura Pieretti, Rodney Arcenas, Stacy G Beal, Herbert Houck, Emma Boslet, John A Lednicky
BACKGROUND: Yearly influenza virus mutations potentially affect the performance of molecular assays, if nucleic acid changes involve the sequences in the assay. Because individual patient viral loads depend on variables such as duration of illness, specimen type, age, and immunosuppression, we examined seasonal population averages of positive tests to smooth inherent variability. METHODS: We studied the population seasonal averages of the semi-quantitative nAMPs for the influenza matrix and hemagglutinin genes in the GenMark (Carlsbad, CA) Respiratory Viral Panel assay between 3 institutions over 3 Influenza seasons...
July 14, 2017: Virology Journal
https://www.readbyqxmd.com/read/28705972/whole-genome-sequences-of-influenza-a-h1n1-pdm09-virus-isolates-from-kerala-india
#18
Sara Jones, Raji Prasad, Anjana S Nair, Sanjai Dharmaseelan, Remya Usha, Radhakrishnan R Nair, Radhakrishna Madhavan Pillai
We report here the whole-genome sequence of six clinical isolates of influenza A(H1N1)pdm09, isolated from Kerala, India. Amino acid analysis of all gene segments from the A(H1N1)pdm09 isolates obtained in 2014 and 2015 identified several new mutations compared to the 2009 A(H1N1) pandemic strain.
July 13, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28701401/evaluation-of-the-biological-properties-and-cross-reactive-antibody-response-to-h10-influenza-viruses-in-ferrets
#19
Troy C Sutton, Elaine W Lamirande, Rita Czako, Kanta Subbarao
The recent outbreak of avian origin H10N7 influenza among seals in Northern Europe, and two fatal human infections with an avian H10N8 virus in China, have demonstrated that H10 viruses can spread between mammals and cause severe disease in humans. To gain insight into the potential for H10 viruses to cross the species barrier and identify a candidate vaccine strain, we evaluated the in vitro and in vivo properties and antibody response in ferrets to 20 diverse H10 viruses. H10 virus infection of ferrets caused variable weight loss and all 20 viruses replicated throughout the respiratory tract; however, replication in the lungs was highly variable...
July 12, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28694834/influenza-vaccine-response-in-community-dwelling-german-prefrail-and-frail-individuals
#20
Jürgen M Bauer, Antonio De Castro, Nabil Bosco, Celine Romagny, Rebecca Diekmann, Jalil Benyacoub, Karine Vidal
BACKGROUND: The age-related dysregulation of the immune system in older persons results in reduced responses to vaccination and greater susceptibility to infection, especially in frail individuals who suffer the greatest of morbidity and mortality due to infection. Recently, significantly reduced anti-influenza antibody titers and increased rates of influenza infection after vaccination were reported in community-dwelling American frail older adults. The aim of our study was to further assess the relative impact of frailty and of each individual Fried frailty criterion on influenza vaccine response...
2017: Immunity & Ageing: I & A
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