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Influenza H1n1

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https://www.readbyqxmd.com/read/28453845/effect-of-repeated-vaccination-with-the-same-vaccine-component-against-2009-pandemic-influenza-a-h1n1-virus
#1
Iván Martínez-Baz, Itziar Casado, Ana Navascués, Jorge Díaz-González, Aitziber Aguinaga, Laura Barrado, Josu Delfrade, Carmen Ezpeleta, Jesús Castilla
Background.: The 2009 pandemic influenza A(H1N1) (A[H1N1]pdm09) vaccine component has remained unchanged from 2009. We estimate the effectiveness of current and prior inactivated influenza A(H1N1)pdm09 vaccination from influenza seasons 2010-2011 to 2015-2016. Methods.: Patients attended with influenza-like illness were tested for influenza. Four periods with continued A(H1N1)pdm09 circulation were included in a test-negative design. Results.: We enrolled 1278 cases and 2343 controls...
March 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28448963/paradoxical-aging-in-hiv-immune-senescence-of-b-cells-is-most-prominent-in-young-age
#2
Stefano Rinaldi, Suresh Pallikkuth, Varghese K George, Lesley R de Armas, Rajendra Pahwa, Celeste M Sanchez, Maria Fernanda Pallin, Li Pan, Nicola Cotugno, Gordon Dickinson, Allan Rodriguez, Margaret Fischl, Maria Alcaide, Louis Gonzalez, Paolo Palma, Savita Pahwa
Combination antiretroviral therapies (cART)can lead to normal life expectancy in HIV-infected persons, and people aged >50 yrs represent the fastest growing HIV group. Although HIV and aging are independently associated with impaired humoral immunity, immune status in people aging with HIV is relatively unexplored. In this study influenza vaccination was used to probe age associated perturbations in the B cell compartment of HIV-negative "healthy controls" (HC) and virologically controlled HIV-infected participants on cART (HIV) (n=124), grouped by age as young (<40 yrs), middle-aged (40-59yrs) or old (>60 yrs)...
April 27, 2017: Aging
https://www.readbyqxmd.com/read/28446441/long-term-persistence-of-cell-mediated-and-humoral-responses-to-a-h1n1-pdm09-influenza-virus-vaccines-and-the-role-of-the-as03-adjuvant-system-in-adults-during-two-randomized-controlled-trials
#3
Robbert G van der Most, Frédéric Clément, Julie Willekens, Walthère Dewé, Karl Walravens, David W Vaughn, Geert Leroux-Roels
We investigated the role of AS03, an α-tocopherol oil-in-water-emulsion-based Adjuvant System, on the long-term persistence of humoral and cell-mediated immune responses to A(H1N1)pdm09 influenza vaccines. In two studies (NCT00968539/NCT00989287), a total of 261 healthy adults (age ≤60 years) were randomized to receive two doses of AS03-adjuvanted vaccine containing 3.75 μg hemagglutinin, or non-adjuvanted vaccine containing 15 μg hemagglutinin (in Study A) or 3.75 μg hemagglutinin (in Study B), 21 days apart...
April 26, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28439196/clinical-differences-of-influenza-subspecies-among-hospitalized-children
#4
Manolya Acar, Murat Sütçü, Hacer Aktürk, Selda Hançerli Törün, Metin Uysalol, Sevim Meşe, Nuran Salman, Ayper Somer
AIM: Clinical findings, mortality, and morbidity rates differ among influenza subspecies. Awareness of these differences will lead physicians to choose the proper diagnostic and therapeutic strategies and to foresee possible complications. The aim of this study was to evaluate the clinical differences of influenza subspecies among hospitalized children. MATERIAL AND METHODS: Hospitalized children with proven influenza infection by polymerase chain reaction on nasopharyngeal swab specimens in our clinic, between December 2013 and March 2016, were enrolled...
March 2017: Türk Pediatri Arşivi
https://www.readbyqxmd.com/read/28431812/potency-of-whole-virus-particle-and-split-virion-vaccines-using-dissolving-microneedle-against-challenges-of-h1n1-and-h5n1-influenza-viruses-in-mice
#5
Akihiro Nakatsukasa, Koji Kuruma, Masatoshi Okamatsu, Takahiro Hiono, Mizuho Suzuki, Keita Matsuno, Hiroshi Kida, Takayoshi Oyamada, Yoshihiro Sakoda
Transdermal vaccination using a microneedle (MN) confers enhanced immunity compared with subcutaneous (SC) vaccination. Here we developed a novel dissolving MN patch for the influenza vaccine. The potencies of split virion and whole virus particle (WVP) vaccines prepared from A/Puerto Rico/8/1934 (H1N1) and A/duck/Hokkaido/Vac-3/2007 (H5N1), respectively, were evaluated. MN vaccination induced higher neutralizing antibody responses than SC vaccination in mice. Moreover, MN vaccination with a lower dose of antigens conferred protective immunity against lethal challenges of influenza viruses than SC vaccination in mice...
April 18, 2017: Vaccine
https://www.readbyqxmd.com/read/28428558/a-joint-analysis-of-influenza-associated-hospitalizations-and-mortality-in-hong-kong-1998-2013
#6
Peng Wu, Anne M Presanis, Helen S Bond, Eric H Y Lau, Vicky J Fang, Benjamin J Cowling
Influenza viruses may cause severe human infections leading to hospitalization or death. Linear regression models were fitted to population-based data on hospitalizations and deaths. Surveillance data on influenza virus activity permitted inference on influenza-associated hospitalizations and deaths. The ratios of these estimates were used as a potential indicator of severity. Influenza was associated with 431 (95% CrI: 358-503) respiratory deaths and 12,700 (95% CrI: 11,700-13,700) respiratory hospitalizations per year...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28426646/community-mitigation-guidelines-to-prevent-pandemic-influenza-united-states-2017
#7
Noreen Qualls, Alexandra Levitt, Neha Kanade, Narue Wright-Jegede, Stephanie Dopson, Matthew Biggerstaff, Carrie Reed, Amra Uzicanin
When a novel influenza A virus with pandemic potential emerges, nonpharmaceutical interventions (NPIs) often are the most readily available interventions to help slow transmission of the virus in communities, which is especially important before a pandemic vaccine becomes widely available. NPIs, also known as community mitigation measures, are actions that persons and communities can take to help slow the spread of respiratory virus infections, including seasonal and pandemic influenza viruses.These guidelines replace the 2007 Interim Pre-pandemic Planning Guidance: Community Strategy for Pandemic Influenza Mitigation in the United States - Early, Targeted, Layered Use of Nonpharmaceutical Interventions (https://stacks...
April 21, 2017: MMWR. Recommendations and Reports: Morbidity and Mortality Weekly Report. Recommendations and Reports
https://www.readbyqxmd.com/read/28425933/study-on-the-rationality-for-antiviral-activity-of-flos-lonicerae-japonicae-fructus-forsythiae-herb-chito-oligosaccharide-via-integral-pharmacokinetics
#8
Wei Zhou, Ailing Yin, Jinjun Shan, Shouchuan Wang, Baochang Cai, Liuqing Di
In the present study, the rationality for the antiviral effect (H1N1 virus) of Flos Lonicerae Japonicae (FLJ, named JinYinHua)-Fructus forsythiae (FF, named LianQiao) herb couple preparations improved by chito-oligosaccharide (COS) was investigated. We found that the improvement of antiviral activity for four preparations attributed to the enhancement of bioavailability for the FLJ-FF herb couple in vivo, and that caffeic acid derivatives are the most important type of components for antiviral activity. The anti-Influenza virus activity-half maximal inhibitory concentration (IC50), not area under concentration (AUC) was considered as the weighting factor for integrating the pharmacokinetics of caffeic acid derivatives...
April 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28424077/plasma-metabolomics-for-the-diagnosis-and-prognosis-of-h1n1-influenza-pneumonia
#9
Mohammad M Banoei, Hans J Vogel, Aalim M Weljie, Anand Kumar, Sachin Yende, Derek C Angus, Brent W Winston
BACKGROUND: Metabolomics is a tool that has been used for the diagnosis and prognosis of specific diseases. The purpose of this study was to examine if metabolomics could be used as a potential diagnostic and prognostic tool for H1N1 pneumonia. Our hypothesis was that metabolomics can potentially be used early for the diagnosis and prognosis of H1N1 influenza pneumonia. METHODS: (1)H nuclear magnetic resonance spectroscopy and gas chromatography-mass spectrometry were used to profile the metabolome in 42 patients with H1N1 pneumonia, 31 ventilated control subjects in the intensive care unit (ICU), and 30 culture-positive plasma samples from patients with bacterial community-acquired pneumonia drawn within the first 24 h of hospital admission for diagnosis and prognosis of disease...
April 19, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28421062/identification-of-rare-pb2-d701n-mutation-from-a-patient-with-severe-influenza-contribution-of-the-pb2-d701n-mutation-to-the-pathogenicity-of-human-influenza
#10
Amelia Nieto, Francisco Pozo, Matxalen Vidal-García, Manuel Omeñaca, Inmaculada Casas, Ana Falcón
Several amino acid changes have been previously implicated in adaptation of avian influenza viruses to human hosts, among them the D701N change in the PB2 polymerase subunit that also is the main determinant of avian virus pathogenesis in animal models. However, previous studies using recombinant viruses did not provide conclusive information of the contribution of this PB2 residue to pathogenicity in human influenza virus strains. We identified this mutation in an A(H1N1)pdm09-like human influenza virus isolated from an infected patient with pneumonia and acute respiratory failure, admitted to the intensive care unit...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28418745/taiwan-s-experience-in-hospital-preparedness-and-response-for-emerging-infectious-diseases
#11
Hui-Yun Kao, Hai-Yun Ko, Peng Guo, Chang-Hsun Chen, Su-Mei Chou
The Communicable Disease Control Medical Network (CDCMN), established in 2003 after the SARS outbreak in Taiwan, has undergone several phases of modification in structure and activation. The main organizing principles of the CDCMN are centralized isolation of patients with severe highly infectious diseases and centralization of medical resources, as well as a network of designated regional hospitals like those in other countries. The CDCMN is made up of a command system, responding hospitals, and supporting hospitals...
March 2017: Health Security
https://www.readbyqxmd.com/read/28418300/population-responses-during-the-pandemic-phase-of-the-influenza-a-h1n1-pdm09-epidemic-hong-kong-china
#12
Nelson C Y Yeung, Joseph T F Lau, Kai Chow Choi, Sian Griffiths
During August 2009-July 2010, we conducted 7 longitudinal telephone surveys among 503 adults in Hong Kong, China, to explore changes in their behavioral and psychological responses to the influenza A(H1N1)pdm09 virus epidemic. Trends were examined using generalized estimating equations models. Findings showed that responses varied with the course of the pandemic.
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28417640/combinations-of-l-n-g-monomethyl-arginine-and-oseltamivir-against-pandemic-influenza-a-virus-infections-in-mice
#13
Donald F Smee, Ashley Dagley, E B Tarbet
L-N(G)-monomethyl-arginine (L-NMMA) is an experimental compound that suppresses nitric oxide production in animals. The compound was combined with oseltamivir to treat lethal influenza A/California/04/2009 (H1N1) pandemic virus infections in mice. Treatments were given twice a day for five days starting 4 h (oseltamivir, by oral gavage) or three days (L-NMMA, by intraperitoneal route; corresponding to the time previously reported for nitric oxide induction in the animals) after infection. Low doses of oseltamivir were used in order to demonstrate synergy or antagonism...
April 2017: Antiviral Chemistry & Chemotherapy
https://www.readbyqxmd.com/read/28417634/anti-influenza-a-virus-activity-of-dendrobine-and-its-mechanism-of-action
#14
Richan Li, Teng Liu, Miaomiao Liu, Feimin Chen, Shu-Wen Liu, Jie Yang
Dendrobine, a major component of Dendrobium nobile, increasingly draws attention to its wide applications in health care. Here we explore potential effect of dendrobine against influenza A virus and elucidate the underlying mechanism. Our results indicated that dendrobine possessed antiviral activity against influenza A viruses, including A/FM-1/1/47 (H1N1), A/Puerto Rico/8/34 H274Y (H1N1) and A/Aichi/2/68 (H3N2) with IC50 value of 3.39±0.32, 2.16±0.91, 5.32±1.68 μg/mL, respectively. Mechanism studies revealed that dendrobine inhibited early steps in the viral replication cycle...
April 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28417321/adjuvanted-as03-a-h1n1-2009-pandemic-influenza-vaccines-and-solid-organ-transplant-rejection-systematic-signal-evaluation-and-lessons-learnt
#15
Gaël Dos Santos, Harry A Seifert, Vincent Bauchau, Vivek Shinde, Dominique M Barbeau, Catherine Cohet
INTRODUCTION: We investigated a signal of solid organ transplant (SOT) rejection after immunisation with (AS03) A/H1N1 2009 pandemic influenza vaccines. METHODS: Potential immunological mechanisms were reviewed and quantitative analyses were conducted. The feasibility of pharmacoepidemiological studies was explored. RESULTS: Overall results, including data from a pharmacoepidemiological study, support the safety of adjuvanted (AS03) pandemic influenza vaccination in SOT recipients...
April 17, 2017: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/28415629/a-h1n1-pdm09-influenza-infection-vaccine-inefficiency
#16
Nehemya Friedman, Yaron Drori, Rakefet Pando, Aharona Glatman-Freedman, Hanna Sefty, Ravit Bassal, Yaniv Stein, Tamy Shohat, Ella Mendelson, Musa Hindiyeh, Michal Mandelboim
The last influenza pandemic, caused by the swine A(H1N1)pdm09 influenza virus, began in North America at 2009. Since then, the World Health Organization (WHO) recommended integration of the swine-based virus A/California/07/2009 strain in yearly vaccinations. Yet, infections with A(H1N1)pdm09 have continued in subsequent years. The reasons for this are currently unknown. During the 2015-2016 influenza season, we noted an increased prevalence of A(H1N1)pdm09 influenza virus infection in Israel. Our phylogenetic analysis indicated that the circulating A(H1N1)pdm09 strains belonged to 6B...
March 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414953/health-shocks-and-their-long-lasting-impact-on-health-behaviors-evidence-from-the-2009-h1n1-pandemic-in-mexico
#17
Jorge M Agüero, Trinidad Beleche
Worldwide, the leading causes of death could be avoided with health behaviors that are low-cost but also difficult to adopt. We show that exogenous health shocks could facilitate the adoption of these behaviors and provide long-lasting effects on health outcomes. Specifically, we exploit the spatial and temporal variation of the 2009 H1N1 influenza pandemic in Mexico and show that areas with a higher incidence of H1N1 experienced larger reductions in diarrhea-related cases among young children. These reductions continue even three years after the shock ended...
March 31, 2017: Journal of Health Economics
https://www.readbyqxmd.com/read/28414053/inhibition-effects-of-novel-polyketide-compound-ppq-b-against-influenza-a-virus-replication-by-interfering-with-the-cellular-egfr-pathway
#18
Miaomiao Wang, Shuyao Wang, Wei Wang, Yi Wang, Hui Wang, Weiming Zhu
Development of anti-influenza A virus (IAV) drugs with novel targets and low toxicity is critical for preparedness against influenza outbreaks. In the current study, our results indicated that the novel polyketide compound purpurquinone B (PPQ-B) derived from acid-tolerant fungus Penicillium purpurogenum strain JS03-21 suppressed the replication of IAV in vitro with low toxicity, and may block some stages after virus adsorption. PPQ-B could inhibit H1N1 (A/Puerto Rico/8/34; PR8), H1N1 (A/California/04/2009; Cal09) and H3N2 (A/swine/Minnesota/02719/2009) virus replication in vitro, suggesting that PPQ-B possesses broad-spectrum anti-IAV activities...
April 13, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28413489/retrospective-review-of-epidemic-viral-pneumonia-cases-in-turkey-a-multicenter-study
#19
Mustafa Çörtük, Murat Acat, Onur Yazici, Zehra Yasar, Kemal Kiraz, Sena Yapicioglu Ataman, Elif Tanriverdi, Burcak Zitouni, Cenk Kirakli, Ozlem Ediboglu, Fevziye Tuksavul, Adem Dirican, Hale Kefeli Celik, Sevket Ozkaya, Erdogan Cetinkaya
Influenza A (H1N1) caused its first pandemic in 2009 in USA and Mexico. Since then, clinicians have exercised great care in order to make an early diagnosis of viral pneumonias. This is due in part to pandemic influenza A infection having greater impact on populations <65 years old than other viral strains, including seasonal influenza. Chest radiographies of those affected displayed a rapid progression of patchy infiltrates, and a large proportion of individuals required admission to intensive care units (ICU)...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28411453/inhibition-of-influenza-virus-infection-by-multivalent-pentacyclic-triterpene-functionalized-per-o-methylated-cyclodextrin-conjugates
#20
Zhenyu Tian, Longlong Si, Kun Meng, Xiaoshu Zhou, Yongmin Zhang, Demin Zhou, Sulong Xiao
Multivalent ligands that exhibit high binding affinity to influenza hemagglutinin (HA) trimer can block the interaction of HA with its sialic acid receptor. In this study, a series of multivalent pentacyclic triterpene-functionalized per-O-methylated cyclodextrin (CD) derivatives were designed and synthesized using 1, 3-dipolar cycloaddition click reaction. A cell-based assay showed that three compounds (25, 28 and 31) exhibited strong inhibitory activity against influenza A/WSN/33 (H1N1) virus. Compound 28 showed the most potent anti-influenza activity with IC50 of 4...
April 2, 2017: European Journal of Medicinal Chemistry
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