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Lara Danziger-Isakov, William J Steinbach, Grant Paulsen, Flor M Munoz, Leigh R Sweet, Michael Green, Marian G Michaels, Janet A Englund, Alastair Murray, Natasha Halasa, Daniel E Dulek, Rebecca Pellett Madan, Betsy C Herold, Brian T Fisher
Background: Respiratory virus infection (RVI) in pediatric solid organ transplant (SOT) recipients poses a significant risk; however, the epidemiology and effects of an RVI after pediatric SOT in the era of current molecular diagnostic assays are unclear. Methods: A retrospective observational cohort of pediatric SOT recipients (January 2010 to June 2013) was assembled from 9 US pediatric transplant centers. Charts were reviewed for RVI events associated with hospitalization within 1 year after the transplant...
March 10, 2018: Journal of the Pediatric Infectious Diseases Society
Mira C Patel, Kari Ann Shirey, Marina S Boukhvalova, Stefanie N Vogel, Jorge C G Blanco
Host-derived "danger-associated molecular patterns" (DAMPs) contribute to innate immune responses and serve as markers of disease progression and severity for inflammatory and infectious diseases. There is accumulating evidence that generation of DAMPs such as oxidized phospholipids and high-mobility-group box 1 (HMGB1) during influenza virus infection leads to acute lung injury (ALI). Treatment of influenza virus-infected mice and cotton rats with the Toll-like receptor 4 (TLR4) antagonist Eritoran blocked DAMP accumulation and ameliorated influenza virus-induced ALI...
March 13, 2018: MBio
Mitsutaka Kitano, Myra Hosmillo, Edward Emmott, Jia Lu, Ian Goodfellow
Human norovirus (HuNoV) is a major cause of nonbacterial gastroenteritis worldwide yet, despite their impact on society, vaccines and antivirals are currently lacking. A HuNoV replicon system has been widely applied to the evaluation of antiviral compounds and has thus accelerated the process of drug discovery against HuNoV infection. Rupintrivir, an irreversible inhibitor of the human rhinovirus 3C protease, has been reported to inhibit the replication of the Norwalk virus replicon via the inhibition of the norovirus protease...
March 12, 2018: Antimicrobial Agents and Chemotherapy
Starling A Sim, Vivian K Y Leung, David Ritchie, Monica A Slavin, Sheena G Sullivan, Benjamin W Teh
BACKGROUND: Viral respiratory tract infections (vRTI) are a significant cause of morbidity and mortality in patients undergoing allogeneic haematopoietic stem cell transplantation (alloHSCT). This study aimed to assess the epidemiological characteristics, risk factors, and outcomes of vRTI occurring from conditioning to 100 days after HSCT in the era of molecular testing. METHODS: This study was a retrospective record review of alloHSCT patients at Royal Melbourne Hospital from January 2010 to December 2015...
March 9, 2018: Biology of Blood and Marrow Transplantation
Yuk-Fai Lau, Wee-Hong Victor Koh, Clement Kan, Poh-Choo Alethea Dua, Ai-Sim Elizabeth Lim, Chin-Wen Jasper Liaw, Qiu-Han Gao, Jeremiah Chng, Vernon J Lee, Boon-Huan Tan, Jin-Phang Loh
BACKGROUND: Respiratory illnesses have been identified as a significant factor leading to lost training time and morbidity among Singapore military recruits. A surveillance programme has been put in place to determine etiological agents responsible for febrile, as well as afebrile respiratory illnesses in a military camp. The goal of the study is to better understand the epidemiology of these diseases and identify potential countermeasures to protect military recruits against them. METHODS: From Jan 2016 - Jan 2017, a total of 2647 respiratory cases were enrolled into the surveillance programme...
March 12, 2018: BMC Infectious Diseases
Samuel C Cerps, Mandy Menzel, Irma Mahmutovic Persson, Leif Bjermer, Hamid Akbarshahi, Lena Uller
Defective production of antiviral interferon (IFN)-β is thought to contribute to rhinovirus-induced asthma exacerbations. These exacerbations are associated with elevated lung levels of lactate dehydrogenase (LDH), indicating occurrence of cell necrosis. We thus hypothesized that reduced lung IFN-β could contribute to necrotic cell death in a model of asthma exacerbations. Wild-type and IFN-β-/- mice were given saline or house dust mite (HDM) intranasally for 3 weeks to induce inflammation. Double-stranded RNA (dsRNA) was then given for additional 3 days to induce exacerbation...
March 9, 2018: Scientific Reports
O S Nikonov, E S Chernykh, M B Garber, E Yu Nikonova
The genus Enterovirus combines a portion of small (+)ssRNA-containing viruses and is divided into 10 species of true enteroviruses and three species of rhinoviruses. These viruses are causative agents of the widest spectrum of severe and deadly epidemic diseases of higher vertebrates, including humans. Their ubiquitous distribution and high pathogenicity motivate active search to counteract enterovirus infections. There are no sufficiently effective drugs targeted against enteroviral diseases, thus treatment is reduced to supportive and symptomatic measures...
December 2017: Biochemistry. Biokhimii︠a︡
Charu Rajput, Megan P Walsh, Breanna N Eder, Ediri E Metitiri, Antonia P Popova, Marc B Hershenson
Infections with rhinovirus (RV) cause asthma exacerbations. Recent studies suggest that macrophages play a role in asthmatic airway inflammation and the innate immune response to RV infection. Macrophages exhibit discrete phenotypes based on surface markers and gene expression. We hypothesized that macrophage polarization state alters gene expression in response to RV infection. Cells were derived from human peripheral blood derived monocytes. M1 and M2 polarization was carried out using IFN-y and IL-4, respectively, and RNA was extracted for Affymetrix Human Gene ST2...
March 9, 2018: Physiological Genomics
Elizabeth J McFarland, Ruth A Karron, Petronella Muresan, Coleen K Cunningham, Megan E Valentine, Charlotte Perlowski, Bhagvanji Thumar, Devasena Gnanashanmugam, George K Siberry, Elizabeth Schappell, Emily Barr, Vivian Rexroad, Ram Yogev, Stephen A Spector, Mariam Aziz, Nehali Patel, Mikhaela Cielo, Cindy Luongo, Peter L Collins, Ursula J Buchholz
Background: Live respiratory syncytial virus (RSV) candidate vaccine LIDΔM2-2 is attenuated by deletion of the RSV RNA regulatory protein M2-2, resulting in upregulated viral gene transcription and antigen expression but reduced RNA replication. Methods: RSV-seronegative children ages 6-24 months received a single intranasal dose of 105 plaque forming units (PFU) of LIDΔM2-2 (n = 20) or placebo (n = 9) (NCT02237209, NCT02040831). RSV serum antibodies, vaccine infectivity, and reactogenicity were assessed...
March 2, 2018: Journal of Infectious Diseases
Emma Kallvik, Laura Toivonen, Ville Peltola, Anne Kaljonen, Susanna Simberg
OBJECTIVES: Health-related factors are part of the multifactorial background of dysphonia in children. Respiratory tract infections affect the same systems and structures that are used for voice production. The purpose of this study was to investigate if the number of respiratory tract infections or the viral etiology were significant predictors for a more hoarse voice quality. METHODS: The participants were 4-year-old children who participated in the multidisciplinary STEPS study (Steps to the Healthy Development and Well-being of Children) where they were followed up from pregnancy or birth to 4 years of age...
March 2, 2018: Journal of Voice: Official Journal of the Voice Foundation
Timothy J Savage, Jane Kuypers, Helen Y Chu, Miranda C Bradford, Anne Marie Buccat, Xuan Qin, Eileen J Klein, Keith R Jerome, Janet A Englund, Alpana Waghmare
BACKGROUND: Severe respiratory disease associated with enterovirus D68 (EV-D68) has been reported in hospitalized pediatric patients. Virologic and clinical characteristics of EV-D68 infections exclusively in patients presenting to a hospital Emergency Department (ED) or urgent care have not been well defined. METHODS: Mid-nasal swabs from pediatric patients with respiratory symptoms presenting to the ED or urgent care were evaluated using a commercial multiplex PCR platform...
March 2, 2018: Influenza and Other Respiratory Viruses
Mireya Robledo-Aceves, María de Jesús Moreno-Peregrina, Fernando Velarde-Rivera, Elba Ascencio-Esparza, Francisco M Preciado-Figueroa, Miguela A Caniza, Griselda Escobedo-Melendez
Severe bronchiolitis is the most common reason for hospitalization among children younger than 2 years. This study analyzed the prevalence of community-acquired respiratory virus infection and the risk factors for hospitalization of Mexican children with severe bronchiolitis treated in an Emergency department.This retrospective study included 134 children 2 years or younger with severe viral bronchiolitis, and 134 healthy age-matched controls. The study period was September 2012 to January 2015. We determined the viral etiology and coinfections with multiple viruses and compared the risk factors detected in children with severe viral bronchiolitis with those in the control group...
March 2018: Medicine (Baltimore)
Jeong-Min Kim, Hee-Dong Jung, Hyang-Min Cheong, Anna Lee, Nam-Joo Lee, Hyuk Chu, Sung Soon Kim, Jang-Hoon Choi
The prevalence of eight respiratory viruses detected in patients with acute respiratory infections (ARIs) in Korea was investigated through analysis of data recorded by the Korea Influenza and Respiratory Viruses Surveillance System (KINRESS) from 2013 to 2015. Nasal aspirate and throat swabs specimens were collected from 36,915 patients with ARIs, and viral nucleic acids were detected by real-time (reverse-transcription) polymerase chain reaction for eight respiratory viruses, including human respiratory syncytial viruses (HRSVs), influenza viruses (IFVs), human parainfluenza viruses (HPIVs), human coronaviruses (HCoVs), human rhinovirus (HRV), human adenovirus (HAdV), human bocavirus (HBoV), and human metapneumovirus (HMPV)...
February 28, 2018: Journal of Medical Virology
Jose L Gomez, Maria P Diaz, Gustavo Nino, Clemente J Britto
BACKGROUND: Asthma exacerbations are an important cause of morbidity in asthma. Respiratory infections are often involved in asthma exacerbations in both children and adults. Some individuals with asthma have increased susceptibility to viral infections and as a result increased rates of asthma exacerbations. We sought to identify a transcriptomic signature in the blood associated with asthma exacerbations triggered by respiratory infections (AETRI) and determine its association with increased risk for asthma exacerbations...
February 27, 2018: BMC Medical Genomics
George V Guibas, Maria Tsolia, Ioannis Christodoulou, Fotini Stripeli, Zoi Sakkou, Nikolaos G Papadopoulos
BACKGROUND: Rhinovirus (RV) is an established trigger of asthma attacks, whereas such a link is less consistent for influenza virus (IFV). OBJECTIVE: In the context of precision medicine, we hypothesized that IFV infection may cause a condition essentially different from RV, and we investigated this by evaluating clinical characteristics of RV/IFV-positive and -negative children with respiratory symptoms and/or fever. METHODS: 1207 children, 6-months to 13-years old, hospitalized for flu-like illness were recruited in this cross-sectional study...
February 23, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
Dieng Assane, Camara Makhtar, Diop Abdoulaye, Fall Amary, Boiro Djibril, Diop Amadou, Diouf Jean Baptiste Niokhor, Diop Amadou, Loucoubar Cheikh, Dia Ndongo, Niang Mbayame, Fall Lamine, Boye Cheikh Saad Bouh
Acute respiratory infections (ARIs) are the leading cause of infectious disease-related morbidity, hospitalization, and morbidity among children worldwide. This study aimed to assess the viral and bacterial causes of ARI morbidity and mortality in children under 5 years in Senegal. Nasopharyngeal samples were collected from children under 5 years who had ARI. Viruses and bacteria were identified using multiplex real-time reverse transcription-polymerase chain reaction and conventional biochemical techniques, respectively...
2018: Microbiology Insights
Adnan Custovic, Danielle Belgrave, Lijing Lin, Eteri Bakhsoliani, Aurica G Telcian, Roberto Solari, Clare S Murray, Ross P Walton, John Curtin, Michael R Edwards, Angela Simpson, Magnus Rattray, Sebastian L Johnston
BACKGROUND: Immunophenotypes of anti-viral responses, and their relationship with asthma, allergy and lower respiratory tract infections (LRTIs) are poorly understood. We characterized multiple cytokine responses of peripheral-blood mononuclear cells to rhinovirus stimulation, and their relationship with clinical outcomes. METHODS: In a population-based birth cohort, we measured 28 cytokines post-stimulation with rhinovirus-16 in 307 children aged 11 years. We used machine learning to identify patterns of cytokine responses, and related these patterns to clinical outcomes using longitudinal models...
February 21, 2018: American Journal of Respiratory and Critical Care Medicine
B M Varghese, E Dent, M Chilver, S Cameron, N P Stocks
Acute respiratory infections cause significant morbidity and mortality accounting for 5.8 million deaths worldwide. In Australia, influenza-like illness (ILI), defined as cough, fever and fatigue is a common presentation in general practice and results in reduced productivity and lost working days. Little is known about the epidemiology of ILI in working-age adults. Using data from the ASPREN influenza surveillance network in Australia (2010-2013) we found that working-age adults made up 45.2% of all ILI notifications with 55% of samples positive for at least one respiratory virus...
February 21, 2018: Epidemiology and Infection
Mohsen Meidani, Seyed Alireza Mirmohammad Sadeghi
Background: Respiratory infections are a frequent cause of fever in neutropenic patients, whereas respiratory viral infections are not frequently considered as a diagnosis, which causes high morbidity and mortality in these patients. Materials and Methods: This prospective study was performed on 36 patients with neutropenia who admitted to hospital were eligible for inclusion with fever (single temperature of >38.3°C or a sustained temperature of >38°C for more than 1 h), upper and lower respiratory symptoms...
2018: Advanced Biomedical Research
Kelvin K W To, Lu Lu, Carol H Y Fong, Alan K L Wu, Ka-Yi Mok, Cyril C Y Yip, Yi-Hong Ke, Kong-Hung Sze, Susanna K P Lau, Ivan F N Hung, Kwok-Yung Yuen
OBJECTIVES: We assessed the immunological response of hospitalized adult patients with rhinovirus infection, including critically-ill patients. METHODS: The differential white blood cell (WBC) count and the levels of 29 plasma cytokines/chemokines were compared between 50 adult hospitalized patients with rhinovirus infection and 100 age-matched controls with influenza virus infection. RESULTS: The demographics and comorbidities were similar between rhinovirus and influenza patients, but severe disease was more common for the rhinovirus cohort...
February 15, 2018: Journal of Infection
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