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https://www.readbyqxmd.com/read/27922126/viral-and-bacterial-co-infection-in-severe-pneumonia-triggers-innate-immune-responses-and-specifically-enhances-ip-10-a-translational-study
#1
Jonathan Hoffmann, Daniela Machado, Olivier Terrier, Stephane Pouzol, Mélina Messaoudi, Wilma Basualdo, Emilio E Espínola, Rosa M Guillen, Manuel Rosa-Calatrava, Valentina Picot, Thomas Bénet, Hubert Endtz, Graciela Russomando, Gláucia Paranhos-Baccalà
Mixed viral and bacterial infections are widely described in community-acquired pneumonia; however, the clinical implications of co-infection on the associated immunopathology remain poorly studied. In this study, microRNA, mRNA and cytokine/chemokine secretion profiling were investigated for human monocyte-derived macrophages infected in-vitro with Influenza virus A/H1N1 and/or Streptococcus pneumoniae. We observed that the in-vitro co-infection synergistically increased interferon-γ-induced protein-10 (CXCL10, IP-10) expression compared to the singly-infected cells conditions...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27919283/outcomes-and-survival-prediction-models-for-severe-adult-acute-respiratory-distress-syndrome-treated-with-extracorporeal-membrane-oxygenation
#2
REVIEW
Sacha Rozencwajg, David Pilcher, Alain Combes, Matthieu Schmidt
Extracorporeal membrane oxygenation (ECMO) for severe acute respiratory distress syndrome (ARDS) has known a growing interest over the last decades with promising results during the 2009 A(H1N1) influenza epidemic. Targeting populations that can most benefit from this therapy is now of major importance.Survival has steadily improved for a decade, reaching up to 65% at hospital discharge in the most recent cohorts. However, ECMO is still marred by frequent and significant complications such as bleeding and nosocomial infections...
December 5, 2016: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/27918264/a-major-impact-of-the-influenza-seasonal-epidemic-on-intensive-care-units-r%C3%A3-union-april-to-august-2016
#3
Laurent Filleul, Dany Bakoly Ranoaritiana, Elsa Balleydier, David Vandroux, Clémence Ferlay, Marie-Christine Jaffar-Bandjee, Julien Jaubert, Bénédicte Roquebert, Bruno Lina, Martine Valette, Bruno Hubert, Sophie Larrieu, Elise Brottet
The 2016 seasonal influenza in Réunion in the southern hemisphere, was dominated by influenza A(H1N1)pdm09 (possibly genogroup 6B.1). An estimated 100,500 patients with acute respiratory infection (ARI) consulted a physician (cumulative attack rate 11.9%). Sixty-six laboratory-confirmed cases (65.7/100,000 ARI consultations) were hospitalised in an intensive care unit, the highest number since 2009. Impact on intensive care units was major. Correlation between severe cases was 0.83 between Réunion and France and good for 2009 to 2015...
November 24, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/27914853/monitoring-the-fitness-of-antiviral-resistant-influenza-strains-during-an-epidemic-a-mathematical-modelling-study
#4
Kathy Leung, Marc Lipsitch, Kwok Yung Yuen, Joseph T Wu
BACKGROUND: Antivirals (eg, oseltamivir) are important for mitigating influenza epidemics. In 2007, an oseltamivir-resistant influenza seasonal A H1N1 strain emerged and spread to global fixation within 1 year. This event showed that antiviral-resistant (AVR) strains can be intrinsically more transmissible than their contemporaneous antiviral-sensitive (AVS) counterpart. Surveillance of AVR fitness is therefore essential. Our objective was to develop a simple method for estimating AVR fitness from surveillance data...
November 30, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27914743/sequential-immunization-with-consensus-influenza-hemagglutinins-raises-cross-reactive-neutralizing-antibodies-against-various-heterologous-ha-strains
#5
Hui Zhou, Yang Huang, Songhua Yuan, Yuanyuan Li, Shuyan Wu, Jianqing Xu, Rui Huang
Seasonal and emerging epidemics caused by influenza virus remain as a public health concern and an economic burden. The weak immunogenicity of conserved epitopes on hemagglutinin that induces broad protective immune responses is the main obstacle to the development of universal vaccines. In the present report, we designed the cross-subtypic sequential vaccination strategy and evaluated its neutralizing antibody (nAb) activity by pseudovirus-based neutralization assays. The results clearly indicated that compared with traditional vaccines strategy, the cross-subtypic sequential immunization could significantly induce a broad serum cross-reactive nAb response in mice as well as against homologous strains, and provide protection from heterologous virus PR8 (H1N1) challenge...
November 30, 2016: Vaccine
https://www.readbyqxmd.com/read/27913620/pb1-f2-derived-from-avian-influenza-a-virus-h7n9-induces-inflammation-via-activation-of-the-nlrp3-inflammasome
#6
Anita Pinar, Jennifer K Dowling, Natalie J Bitto, Avril B Robertson, Eicke Latz, Cameron R Stewart, Grant R Drummond, Matthew A Cooper, Julie L McAuley, Michelle D Tate, Ashley Mansell
The emergence of avian H7N9 influenza A virus (IAV) in humans with associated high mortality, has highlighted the threat of a potential pandemic. Fatal H7N9 infections are characterised by hyperinflammation and increased cellular infiltrates in the lung. Currently there are limited therapies to address the pathologies associated with H7N9 infection and what virulence factors may contribute to these pathologies. We have found that PB1-F2 derived from H7N9 activates the NLRP3 inflammasome and induces lung inflammation and cellular recruitment that is NLRP3 dependent...
December 2, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27913239/strategy-for-assessment-of-the-colloidal-and-biological-stability-of-h1n1-influenza-a-viruses
#7
Frank Hämmerling, Oliver Lorenz-Cristea, Pascal Baumann, Jürgen Hubbuch
Current influenza vaccines are mostly formulated as liquids which requires a continuous cold chain to maintain the stability of the antigen. For development of vaccines with an increased stability at ambient temperatures, manifold parameters and their influences on the colloidal stability and activity of the antigen have to be understood. This work presents a strategy to examine both, the colloidal stability and the remaining biological activity of H1N1 influenza viruses under various conditions after an incubation of 40 days...
November 29, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27912070/cardiac-complications-associated-with-the-influenza-viruses-a-subtype-h7n9-or-pandemic-h1n1-in-critically-ill-patients-under-intensive-care
#8
Jiajia Wang, Hua Xu, Xinjing Yang, Daguo Zhao, Shenlang Liu, Xue Sun, Jian-An Huang, Qiang Guo
BACKGROUND AND OBJECTIVE: The clinical presentations and disease courses of patients hospitalized with either influenza A virus subtype H7N9 (H7N9) or 2009 pandemic H1N1 influenza virus (pH1N1) were compared in a recent report, but associated cardiac complications remain unclear. The present retrospective study investigated whether cardiac complications in critically ill patients with H7N9 infections differed from those infected with the pH1N1 strain. METHODS: Suspect cases were confirmed by reverse transcription polymerase chain reaction assays with specific confirmation of the pandemic H1N1 strain at the Centers for Disease Control and Prevention...
November 29, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27912069/immunogenicity-and-safety-of-southern-hemisphere-quadrivalent-inactivated-influenza-vaccine-a-phase-iii-open-label-study-of-adults-in-brazil
#9
Cristiano A F Zerbini, Rodrigo Ribeiro Dos Santos, Maria Jose Nunes, Jyoti Soni, Ping Li, Varsha K Jain, Opokua Ofori-Anyinam
The World Health Organization influenza forecast now includes an influenza B strain from each of the influenza B lineages (B/Yamagata and B/Victoria) for inclusion in seasonal influenza vaccines. Traditional trivalent influenza vaccines include an influenza B strain from one lineage, but because two influenza B lineages frequently co-circulate, the effectiveness of trivalent vaccines may be reduced in seasons of influenza B vaccine-mismatch. Thus, quadrivalent vaccines may potentially reduce the burden of influenza compared with trivalent vaccines...
November 29, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27910950/human-antibody-3e1-targets-the-ha-stem-region-of-h1n1-and-h5n6-influenza-a-viruses
#10
Wenshuai Wang, Xiaoyu Sun, Yanbing Li, Jinpeng Su, Zhiyang Ling, Tianlong Zhang, Fang Wang, Hong Zhang, Hualan Chen, Jianping Ding, Bing Sun
As influenza A viruses remain a major threat to human health worldwide, the discovery of broadly neutralizing monoclonal antibodies that recognize conserved epitopes would facilitate the development of antibody-based therapeutic strategies. Here we report that a VH4-4-encoded human mAb named 3E1 could neutralize H1 and H5 subtype viruses in vitro and protect mice against the H1N1 and H5N6 viruses by inhibiting the low pH-induced conformational rearrangement of haemagglutinin (HA), hence blocking membrane fusion...
December 2, 2016: Nature Communications
https://www.readbyqxmd.com/read/27908830/protective-efficacy-of-fc-targeting-conserved-influenza-virus-m2e-antigen-expressed-by-lactobacillus-plantarum
#11
Wen-Tao Yang, Gui-Lian Yang, Qian Wang, Hai-Bin Huang, Yan-Long Jiang, Chun-Wei Shi, Jian-Zhong Wang, Ke-Yan Huang, Yu-Bei Jin, Chun-Feng Wang
The influenza A (H1N1) virus is a highly contagious acute respiratory disease affecting pigs and humans. This disease causes severe economic loss in many countries, and developing mucosal vaccines is an efficient strategy to control the influenza virus. The neonatal Fc receptor (FcRn) plays an important role in transferring IgG across polarized epithelial cells. In the present study, an oral vaccine was developed using Lactobacillus plantarum to deliver the internal influenza viral protein M2e fused to an IgG Fc fragment...
November 28, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27905835/hemagglutination-inhibiting-antibody-persistence-1-year-after-of-influenza-vaccination-in-korean-children-and-adolescents
#12
Eun-Kyeong Kang, Byung-Wook Eun, Nam-Hee Kim, Yun-Kyung Kim, Jung-Sub Lim, Dong-Ho Kim
This study aimed to assess the one-year immunogenicity of influenza vaccines and the association between immunogenicity at one month and further influenza infections in children aged 6 months to 18 years. Serum hemagglutination inhibition (HI) antibody titers and GMTs were determined for the recommended influenza strains 0, 1, 6, and 12 months post-vaccination. The serological evidence of influenza infections were defined as the increase of HI titer (HI ≥1:40 and 4-fold rise). The seroprotection rates for strains A(H1N1), A(H3N2), and B were 91...
December 1, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27904748/patterns-of-medication-use-and-factors-associated-with-antibiotic-use-among-adult-fever-patients-at-singapore-primary-care-clinics
#13
Zaw Myo Tun, Mahesh Moorthy, Martin Linster, Yvonne C F Su, Richard James Coker, Eng Eong Ooi, Jenny Guek-Hong Low, Gavin J D Smith, Clarence C Tam
BACKGROUND: Antimicrobial resistance is a public health problem of global importance. In Singapore, much focus has been given to antibiotic usage patterns in hospital settings. Data on antibiotic use in primary care is lacking. We describe antibiotic usage patterns and assess factors contributing to antibiotic usage among adults presenting with acute febrile illness (AFI) in primary care settings in Singapore. METHODS: We analyzed data from the Early Dengue infection and outcome study...
2016: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/27904520/a-diagnostic-one-step-real-time-reverse-transcription-polymerase-chain-reaction-method-for-accurate-detection-of-influenza-virus-type-a
#14
Mohammad Amin Behzadi, Mazyar Ziyaeyan, Abdolvahab Alborzi
INTRODUCTION: Influenza A is known as a public health concern worldwide. In this study, a novel one-step real-time reverse transcription polymerase chain reaction (rtRT-PCR) assay was designed and optimized for the detection of influenza A viruses. MATERIAL AND METHODS: The primers and probe were designed based on the analysis of 90 matrix nucleotide sequence data of influenza type A subtypes from the GenBank database of the National Center for Biotechnology Information (NCBI)...
December 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27904034/regulation-of-matrix-metalloproteinases-2-and-9-gene-expression-in-cultured-human-fetal-membrane-cells-by-influenza-virus-infection
#15
Noboru Uchide, Kyoko Obatake, Rie Yamada, Hidetaka Sadanari, Keiko Matsubara, Tsugiya Murayama, Kunio Ohyama
In order to understand a possible etiology of adverse pregnancy outcomes associated with intrauterine influenza virus infection, we examined the effect of influenza virus infection on gene expression of matrix metalloproteinases (MMPs) in cultured amnion epithelial, amnion mesenchymal and chorion trophoblast cells prepared from human fetal membrane tissues by gelatin zymography, Western blotting and reverse transcriptase-PCR. The cells were infected with influenza A (H1N1) virus. The levels of pro-MMP-9 activity in culture supernatants of three types of cells were increased during the period of 24-48 h after the virus infection as compared to those of mock infection...
2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27903601/performance-evaluation-of-allplex%C3%A2-respiratory-panel-1-2-and-3-for-the-detection-of-respiratory-viruses-and-influenza-a-virus-subtypes
#16
Hee Jae Huh, Ji-Youn Kim, Hyeon Jeong Kwon, Sun Ae Yun, Myoung-Keun Lee, Nam Yong Lee, Jong-Won Kim, Chang-Seok Ki
The Allplex™ Respiratory Panel 1, 2, and 3 (Allplex) is a one-step real-time reverse transcription PCR assay for the detection of respiratory viruses (RVs) and influenza A subtypes based on MuDT™ technology. Performance of the Allplex assay was compared to the AdvanSure™ RV real-time PCR Kit (AdvanSure) and PowerChek™ Pandemic H1N1/H3N2/H5N1 Real-time PCR Kit (PowerChek) using 417 clinical respiratory specimens. Compared to the AdvanSure assay for RV detection by each virus, the ranges of positive percent agreement, negative percent agreement, and kappa value were 82...
November 30, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27903058/space-time-epidemiology-and-effect-of-meteorological-parameters-on-influenza-like-illness-in-phitsanulok-a-northern-province-in-thailand
#17
Prakash Madhav Nimbalkar, Nitin Kumar Tripathi
Influenza-like illness (ILI) is an acute respiratory disease that remains a public health concern for its ability to circulate globally affecting any age group and gender causing serious illness with mortality risk. Comprehensive assessment of the spatio-temporal dynamics of ILI is a prerequisite for effective risk assessment and application of control measures. Though meteorological parameters, such as rainfall, average relative humidity and temperature, influence ILI and represent crucial information for control of this disease, the relation between the disease and these variables is not clearly understood in tropical climates...
November 21, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27902386/establishment-of-memory-cd8-t-cells-with-live-attenuated-influenza-virus-laiv-across-different-vaccination-doses
#18
Zhongfang Wang, Lukasz Kedzierska, Simone Nuessing, Brendon Chua, Sergio M Quiñones-Parra, Victor C Huber, David Jackson, Paul G Thomas, Katherine Kedzierska
FluMist has been used in children and adults for more than ten years. As pre-existing CD8+ T-cell memory pools can provide heterologous immunity against distinct influenza viruses, it is important to understand influenza-specific CD8+ T-cell responses elicited by different LAIV regimens. In this study, we immunized mice intranasally (i.n.) with two different doses of live-attenuated PR8 virus (PR8 ts, H1N1), low and high, and then assessed protective efficacy by challenging animals with heterosubtypic X31-H3N2 virus at 6 weeks post-vaccination...
November 2, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27899865/necrotizing-pneumonia-caused-by-h1n1-virus-in-a-child-with-total-anomalous-pulmonary-venous-connection-after-cardiac-surgery
#19
Mehmet G Ramoğlu, Tayfun Uçar, Tanıl Kendirli, Zeynep Eyileten, Semra Atalay
Total anomalous pulmonary venous connection is a rare form of congenital heart disease, occurring in only 1.5% of children with congenital heart disease. Although the mortality and morbidity of total anomalous pulmonary venous connection have decreased dramatically due to improvements in surgery, postoperative pulmonary venous obstruction is still a cause of late mortality in patients with corrected total anomalous pulmonary venous connection. Influenza A H1N1, the most common cause of human influenza in 2009, may cause pneumonia presenting with increased disease severity...
November 2016: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/27898637/influenza-a-h1n1-infection-associated-acute-necrotizing-encephalopathy-in-a-child-with-periodic-lateralized-epileptiform-discharges
#20
Sedat Işikay
No abstract text is available yet for this article.
December 2016: Pediatric Emergency Care
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