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https://www.readbyqxmd.com/read/29453852/a-sulfonozanamivir-analogue-has-potent-anti-influenza-virus-activity
#1
Ádám Hadházi, Linghui Li, Benjamin Bailly, Andrea Maggioni, Gael Martin, Larissa Dirr, Jeffrey Dyason, Robin Thomson, George Gao, Anikó Borbás, Thomas Ve, Mauro Pascolutti, Mark von Itzstein
Influenza virus infection continues to cause significant, often severe, respiratory illness worldwide. A validated target for development of anti-influenza agents is the viral surface protein sialidase. In the current study, we have discovered a highly potent inhibitor of influenza virus sialidase, based on a novel sialosyl sulfonate template. The synthesised 3-guanidino sialosyl α-sulfonate, a sulfonozanamivir analogue, inhibits virus replication in vitro at a nanomolar level, comparable to that of anti-influenza drug zanamivir...
February 17, 2018: ChemMedChem
https://www.readbyqxmd.com/read/29453796/using-a-hospital-admission-survey-to-estimate-the-burden-of-influenza-associated-severe-acute-respiratory-infection-in-one-province-of-cambodia-methods-used-and-lessons-learned
#2
Rebekah J Stewart, Sovann Ly, Borann Sar, Vanra Ieng, Seng Heng, Kheng Sim, Chiedza Machingaidze, Katherine Roguski, Erica Dueger, Ann Moen, Reiko Tsuyuoka, A Danielle Iuliano
BACKGROUND: Understanding the burden of influenza-associated severe acute respiratory infection (SARI) is important for setting national influenza surveillance and vaccine priorities. Estimating influenza-associated SARI rates requires hospital-based surveillance data and a population-based denominator, which can be challenging to determine. OBJECTIVES: We present an application of the World Health Organization's recently developed manual (WHO Manual) including hospital admission survey (HAS) methods for estimating the burden of influenza-associated SARI, with lessons learned to help others calculate similar estimates...
February 16, 2018: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/29452994/transmission-routes-of-respiratory-viruses-among-humans
#3
REVIEW
Jasmin S Kutter, Monique I Spronken, Pieter L Fraaij, Ron Am Fouchier, Sander Herfst
Respiratory tract infections can be caused by a wide variety of viruses. Airborne transmission via droplets and aerosols enables some of these viruses to spread efficiently among humans, causing outbreaks that are difficult to control. Many outbreaks have been investigated retrospectively to study the possible routes of inter-human virus transmission. The results of these studies are often inconclusive and at the same time data from controlled experiments is sparse. Therefore, fundamental knowledge on transmission routes that could be used to improve intervention strategies is still missing...
January 17, 2018: Current Opinion in Virology
https://www.readbyqxmd.com/read/29452288/repetitive-tlr-3-activation-in-the-lung-induces-skeletal-muscle-adaptations-and-cachexia
#4
Ted G Graber, Brandy L Rawls, Bing Tian, William J Durham, Camille R Brightwell, Allan R Brasier, Blake B Rasmussen, Christopher S Fry
Due to immunosenescence, older adults are particularly susceptible to lung-based viral infections, with increased severity of symptoms in those with underlying chronic lung disease. Repeated respiratory viral infections produce lung maladaptations, accelerating pulmonary dysfunction. Toll like 3 receptor (TLR3) is a membrane protein that senses exogenous double-stranded RNA to activate the innate immune response to a viral infection. Polyinosinic-polycytidylic acid [poly(I:C)] mimics double stranded RNA and has been shown to activate TLR3...
February 13, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29451040/pulmonary-delivery-of-influenza-vaccine-formulations-in-cotton-rats-site-of-deposition-plays-a-minor-role-in-the-protective-efficacy-against-clinical-isolate-of-h1n1pdm-virus
#5
Yoshita Bhide, Jasmine Tomar, Wei Dong, Jacqueline de Vries-Idema, Henderik W Frijlink, Anke Huckriede, Wouter L J Hinrichs
Administration of influenza vaccines to the lungs could be an attractive alternative to conventional parenteral administration. In this study, we investigated the deposition site of pulmonary delivered liquid and powder influenza vaccine formulations and its relation to their immunogenicity and protective efficacy. In vivo deposition studies in cotton rats revealed that, the powder formulation was mainly deposited in the trachea ( ∼ 65%) whereas the liquid was homogenously distributed throughout the lungs ( ∼ 96%)...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29451010/assessment-of-mycoplasma-gallisepticum-vaccine-efficacy-in-a-co-infection-challenge-model-with-qx-like-infectious-bronchitis-virus
#6
Dauda G Bwala, Solomon Ponman, Neil Duncan, Daniel B R Wandrag, Celia Abolnik
Mycoplasma gallisepticum (MG) is the primary cause of chronic respiratory disease in poultry. We investigated the protective efficacy of the live attenuated ts-11 and 6/85 MG vaccines against a local MG strain, and in order to enhance symptoms and mimic a typical field situation, we co-infected birds with a virulent strain of QX-like infectious bronchitis virus (IBV). Both vaccines showed similar ability to protect infected chickens from clinical signs, although ts-11 performed slightly better. Despite the lower protection against clinical disease, 6/85-vaccinated birds had significantly (P≤0...
February 16, 2018: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/29450988/salso-bromo-iodine-thermal-water-a-nonpharmacological-alternative-treatment-for-postnasal-drip-related-cough-in-children-with-upper-respiratory-tract-infections
#7
I La Mantia, G Ciprandi, A Varricchio, F Cupido, C Andaloro
Postnasal drip (PND)-related cough is a very common symptom in patients with upper respiratory tract infections (URTIs). At present, there is not a standard treatment for postnasal drip and postnasal drip-related cough. The aim of this pilot study was to evaluate the efficacy of a specific salso-bromo-iodine thermal water containing hyaluronic acid and grapefruit seed extract (SBI-H-GSE) comparing it with a normal saline solution in children with URTIs who refer PND-related symptoms. The study was randomized, single-blind, and controlled...
January 2018: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29450387/orbital-cellulitis-and-brain-abscess-rare-complications-of-maxillo-spheno-ethmoidal-rhinosinusitis
#8
Farah Constantin, Patricia-Alexandra Niculescu, Oana Petre, Daniel Balasa, Alexandru Tunas, Ioana Rusu, Mihai Lupascu, Cristiana Orodel
Sinus infections can be complicated by ocular infections and, in late phases, by brain parenchyma infection. The article debates the case of a 12-year-old patient suffering from paucisymptomatic maxillo-spheno-ethmoidal rhinosinusitis, which was later complicated by orbital cellulitis, ending with the development of a brain abscess. The treatment is complex, initially targeting the source of the infection through draining the collection by middle maxillary antrostomy and anterior posterior ethmoidectomy, then the ablation of the brain abscess and postoperatively with prolonged massive antibiotherapy...
April 2017: Romanian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29450214/-mycobacterium-abscessus-complex-infections-a-retrospective-cohort-study
#9
Maroun Sfeir, Marissa Walsh, Rossana Rosa, Laura Aragon, Sze Yan Liu, Timothy Cleary, Marylee Worley, Corey Frederick, Lilian M Abbo
Background: Infections caused by Mycobacterium abscessus group strains are usually resistant to multiple antimicrobials and challenging to treat worldwide. We describe the risk factors, treatment, and clinical outcomes of patients in 2 large academic medical centers in the United States. Methods: A retrospective cohort study of hospitalized adults with a positive culture for M. abscessus in Miami, Florida (January 1, 2011, to December 31, 2014). Demographics, comorbidities, the source of infection, antimicrobial susceptibilities, and clinical outcomes were analyzed...
February 2018: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/29450193/a-method-for-quantification-of-epithelium-colonization-capacity-by-pathogenic-bacteria
#10
Rune M Pedersen, Rasmus B Grønnemose, Kristian Stærk, Cecilie A Asferg, Thea B Andersen, Hans J Kolmos, Jakob Møller-Jensen, Thomas E Andersen
Most bacterial infections initiate at the mucosal epithelium lining the gastrointestinal, respiratory, and urogenital tracts. At these sites, bacterial pathogens must adhere and increase in numbers to effectively breach the outer barrier and invade the host. If the bacterium succeeds in reaching the bloodstream, effective dissemination again requires that bacteria in the blood, reestablish contact to distant endothelium sites and form secondary site foci. The infectious potential of bacteria is therefore closely linked to their ability to adhere to, colonize, and invade epithelial and endothelial surfaces...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29449938/molecular-characteristics-and-successful-management-of-a-respiratory-syncytial-virus-outbreak-among-pediatric-patients-with-hemato-oncological-disease
#11
Claas Baier, Sibylle Haid, Andreas Beilken, Astrid Behnert, Martin Wetzke, Richard J P Brown, Corinna Schmitt, Ella Ebadi, Gesine Hansen, Thomas F Schulz, Thomas Pietschmann, Franz-Christoph Bange
Background: Respiratory syncytial virus (RSV) is responsible for upper and lower respiratory tract infection in adults and children. Especially immunocompromised patients are at high risk for a severe course of infection, and mortality is increased. Moreover RSV can spread in healthcare settings and can cause outbreaks. Herein we demonstrate the successful control and characteristics of a RSV outbreak that included 8 patients in our Department of Pediatric Hematology and Oncology. Methods: We performed an epidemiologic investigation and a molecular analysis of the outbreak strains...
2018: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/29449803/the-consequences-of-preterm-birth-and-chorioamnionitis-on-brainstem-respiratory-centers-implications-for-neurochemical-development-and-altered-functions-by-inflammation-and-prostaglandins
#12
REVIEW
Vanesa Stojanovska, Suzanne L Miller, Stuart B Hooper, Graeme R Polglase
Preterm birth is a major cause for neonatal morbidity and mortality, and is frequently associated with adverse neurological outcomes. The transition from intrauterine to extrauterine life at birth is particularly challenging for preterm infants. The main physiological driver for extrauterine transition is the establishment of spontaneous breathing. However, preterm infants have difficulty clearing lung liquid, have insufficient surfactant levels, and underdeveloped lungs. Further, preterm infants have an underdeveloped brainstem, resulting in reduced respiratory drive...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29449526/raised-serum-levels-of-syndecan-1-cd138-in-a-case-of-acute-idiopathic-systemic-capillary-leak-syndrome-scls-clarkson-s-disease
#13
Ole Wilhelm Bøe, Kjell Sveen, Magne Børset, Kirk M Druey
BACKGROUND Systemic capillary leak syndrome (SCLS) (Clarkson's disease) is a rare disorder of unknown etiology, characterized by transient episodes of hypotension, and the microvascular leak of fluids into the peripheral tissues, resulting in edema. Between 80-90% of patients with SCLS have a concomitant monoclonal gammopathy. Although translational in vitro studies have implicated vascular endothelial barrier dysfunction in the etiology of SCLS, the etiology and disease associations in clinical cases remain unknown...
February 16, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29449345/antimicrobial-activity-of-a-novel-bioengineered-honey-against-non-typeable-haemophilus-influenzae-biofilms-an-in-vitro-study
#14
Rachel S Newby, Matthew Dryden, Raymond N Allan, Rami J Salib
The opportunistic pathogen non-typeable Haemophilus influenzae (NTHi) plays an important role in many chronic respiratory diseases including otitis media, chronic rhinosinusitis, cystic fibrosis and chronic obstructive pulmonary disease. Biofilm formation has been implicated in NTHi colonisation, persistence of infection and recalcitrance towards antimicrobials. There is therefore a pressing need for the development of novel treatment strategies that are effective against NTHi biofilm-associated diseases. SurgihoneyRO is a honey-based product that has been bioengineered to enable the slow release of H 2 O 2 , a reactive oxygen species to which H...
February 15, 2018: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29449287/global-influenza-hospital-based-surveillance-network-gihsn-results-of-surveillance-of-influenza-and-other-respiratory-viruses-in-hospitalised-patients-in-brazil-2015
#15
Sonia M Raboni, Fernanda E A Moura, Braulia C Caetano, Valéria M Avanzi, Luciane A Pereira, Meri B Nogueira, Luine R Vidal, Isabel C F Tavares, Florence K Pradel, Valentina S Picot, Joan Puig-Barbera, Marilda M Siqueira
BACKGROUND: Influenza-like illness occurs annually worldwide, with peak timing and severity varying seasonally, resulting in significant annual mortality. OBJECTIVES: There were three objectives: (1) to describe the epidemiological and clinical features of hospitalised patients with severe acute respiratory infection caused by influenza and other respiratory viruses (ORVs); (2) to report the influenza seasonality in the region and (3) to correlate findings of influenza circulation and immunisation time in Brazil...
February 15, 2018: BMJ Open
https://www.readbyqxmd.com/read/29448955/analysis-of-the-genetic-diversity-and-mrna-expression-level-in-porcine-reproductive-and-respiratory-syndrome-virus-vaccinated-pigs-that-developed-short-or-long-viremias-after-challenge
#16
Martí Cortey, Gaston Arocena, Tahar Ait-Ali, Anna Vidal, Yanli Li, Gerard Martín-Valls, Alison D Wilson, Allan L Archibald, Enric Mateu, Laila Darwich
Porcine reproductive and respiratory syndrome virus (PRRSv) infection alters the host's cellular and humoral immune response. Immunity against PRRSv is multigenic and vary between individuals. The aim of the present study was to compare several genes that encode for molecules involved in the immune response between two groups of vaccinated pigs that experienced short or long viremic periods after PRRSv challenge. These analyses include the sequencing of four SLA Class I, two Class II allele groups, and CD163, plus the analysis by quantitative realtime qRT-PCR of the constitutive expression of TLR2, TLR3, TLR4, TLR7, TLR8 and TLR9 mRNA and other molecules in peripheral blood mononuclear cells...
February 15, 2018: Veterinary Research
https://www.readbyqxmd.com/read/29448067/antiviral-resistance-due-to-deletion-in-the-neuraminidase-gene-and-defective-interfering-like-viral-polymerase-basic-2-rna-of-influenza-a-virus-subtype-h3n2
#17
Ramona Trebbien, Claus Bohn Christiansen, Thea Kølsen Fischer
BACKGROUND AND OBJECTIVE: Antiviral treatment of influenza virus infections can lead to drug resistance of virus. This study investigates a selection of mutations in the full genome of H3N2 influenza A virus isolated from a patient in treatment with oseltamivir. STUDY DESIGN: Respiratory samples from a patient were collected before, during, and after antiviral treatment. Whole genome sequencing of the influenza virus by next generation sequencing, and low-frequency-variant analysis was performed...
February 11, 2018: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/29447989/aetiology-of-lower-respiratory-tract-infection-in-adults-in-primary-care-a-prospective-study-in-11-european-countries
#18
Margareta Ieven, Samuel Coenen, Katherine Loens, Christine Lammens, Frank Coenjaerts, Anouk Vanderstraeten, Birgitta Henriques-Normark, Derrick Crook, Kris Huygen, Chris C Butler, Theo Jm Verheij, Paul Little, Kalina Zlateva, Anton van Loon, Eric Cj Claas, Herman Goossens
OBJECTIVES: To describe the role of bacteria (including bacterial resistance), viruses (including those recently described), and mixed bacterial-viral infections in adults presenting to primary care with lower respiratory tract infection (LRTI). METHODS: We enrolled 3104 adults with LRTI, 141 (4.5%) of whom had community-acquired pneumonia (CAP), and 2985 matched controls in a prospective study in 16 primary care networks in Europe, and followed patients up at 28-35 days...
February 12, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29447988/escmid-study-group-for-infections-in-compromised-hosts-esgich-consensus-document-on-the-safety-of-targeted-and-biological-therapies-an-infectious-diseases-perspective-agents-targeting-lymphoid-cells-surface-antigens-i-cd19-cd20-and-cd52
#19
REVIEW
Małgorzata Mikulska, Simone Lanini, Carlota Gudiol, Lubos Drgona, Giuseppe Ippolito, Mario Fernández-Ruiz, Bernd Salzberger
BACKGROUND: The present review is part of the ESCMID Study Group for Infections in Compromised Hosts (ESGICH) Consensus Document on the safety of targeted and biological therapies. AIMS: To review, from an Infectious Diseases perspective, the safety profile of agents targeting CD19, CD20 and CD52 and to suggest preventive recommendations. SOURCES: Computer-based MEDLINE searches with MeSH terms pertaining to each agent or therapeutic family...
February 12, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29447395/characteristics-and-outcomes-of-coronavirus-infection-in-children-the-role-of-viral-factors-and-an-immunocompromised-state
#20
Chikara Ogimi, Janet A Englund, Miranda C Bradford, Xuan Qin, Michael Boeckh, Alpana Waghmare
Background: Immunocompromised children might be predisposed to serious infections from human coronaviruses (HCoVs), including strains OC43, NL63, HKU1, and 229E; however, the virologic and clinical features of HCoV infection in immunocompromised children have not been compared to those in nonimmunocompromised children. Methods: We retrospectively analyzed a cohort of children who presented to Seattle Children's Hospital and in whom HCoV was detected by a multiplex respiratory polymerase chain reaction assay of a nasal sample between October 2012 and March 2016...
February 13, 2018: Journal of the Pediatric Infectious Diseases Society
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