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Respiratory Syncytial Virus Infection in Childrens

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https://www.readbyqxmd.com/read/28095451/comparing-human-metapneumovirus-and-respiratory-syncytial-virus-viral-co-detections-genotypes-and-risk-factors-for-severe-disease
#1
Nina Moe, Sidsel Krokstad, Inger Heimdal Stenseng, Andreas Christensen, Lars Høsøien Skanke, Kari Ravndal Risnes, Svein Arne Nordbø, Henrik Døllner
BACKGROUND: It is unclarified as to whether viral co-detection and human metapneumovirus (HMPV) genotypes relate to clinical manifestations in children with HMPV and lower respiratory tract infection (LRTI), and if the clinical course and risk factors for severe LRTI differ between HMPV and respiratory syncytial virus (RSV). METHODS: We prospectively enrolled hospitalized children aged <16 years with LRTI from 2006 to 2015. Children were clinically examined, and nasopharyngeal aspirates were analyzed using semi-quantitative, real-time polymerase chain reaction tests for HMPV, RSV and 17 other pathogens...
2017: PloS One
https://www.readbyqxmd.com/read/28092107/rsv-associated-hospitalizations-in-children-in-karachi-pakistan-implications-for-vaccine-prevention-strategies
#2
Asad Ali, Mohammad Tahir Yousafzai, Rabbia Waris, Fatima Jafri, Fatima Aziz, Imran Naeem Abbasi, Anita Zaidi
Major progress is being made in vaccines against Respiratory Syncytial Virus (RSV), with multiple vaccine candidates currently in the clinical phase of development. Making an investment case for public sector financing of RSV vaccine will require estimation of burden, cost-effectiveness and impact. The aim of this study is to determine the proportion, age distribution and clinical spectrum of RSV associated hospitalizations in children in Karachi, Pakistan. A three years prospective study was conducted at the Aga Khan University hospital in Karachi, a city of 20 million in south Pakistan, from August 2009 to June 2012...
January 16, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28090469/the-relationships-between-respiratory-virus-infection-and-aminotransferase-in-children
#3
Jun Suk Oh, Jun Sik Choi, Young Hyuk Lee, Kyung Og Ko, Jae Woo Lim, Eun Jung Cheon, Gyung Min Lee, Jung Min Yoon
PURPOSE: We sought to examine the relationship between the clinical manifestations of nonspecific reactive hepatitis and respiratory virus infection in pediatric patients. METHODS: Patients admitted to the pediatric unit of Konyang University Hospital for lower respiratory tract disease between January 1, 2014 and December 31, 2014 and who underwent reverse transcriptase polymerase chain reaction tests were examined. The patients were divided into those with increased levels of alanine aminotransferase (ALT) or aspartate aminotransferase (AST) and those with normal ALT or AST levels...
December 2016: Pediatric Gastroenterology, Hepatology & Nutrition
https://www.readbyqxmd.com/read/28077700/evaluation-of-alere%C3%A2-i-rsv-for-rapid-detection-of-respiratory-syncytial-virus-in-children-hospitalized-with-acute-respiratory-tract-infection
#4
Rebecca Marie Peters, Sarah Valerie Schnee, Julia Tabatabai, Paul Schnitzler, Johannes Pfeil
Alere™ i RSV is a novel rapid test which applies a nicking enzyme amplification reaction to detect respiratory syncytial virus in point-of-care settings. In this study, we evaluated the Alere™ i RSV assay by using frozen nasopharyngeal swab samples that were collected in viral transport medium from children hospitalized with acute respiratory tract infection during winter season 2015/2016. Alere™ i RSV assay test results were compared to Altona® RealStar RSV real-time reverse transcription PCR (RT-PCR)...
January 11, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28077651/bromodomain-containing-4-brd4-couples-nf%C3%AE%C2%BAb-rela-with-airway-inflammation-and-the-irf-rig-i-amplification-loop-in-respiratory-syncytial-virus-infection
#5
Bing Tian, Jun Yang, Yingxin Zhao, Teodora Ivanciuc, Hong Sun, Roberto P Garofalo, Allan R Brasier
: The airway mucosa expresses protective interferon (IFN) and inflammatory cytokines in response to Respiratory Syncytial Virus (RSV) infection. In this study, we examine the role of bromodomain containing 4 (BRD4) in mediating this innate immune response in human small airway epithelial cells. We observe that RSV induces BRD4 to complex with NFκB/RelA. BRD4 is functionally required for expression of the NFκB-dependent inflammatory gene regulatory network (GRN), including the IFN Response Factor (IRFs)-1 and -7 that mediate a cross-talk pathway for RIG-I upregulation...
January 11, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28076422/monoclonal-antibody-against-g-glycoprotein-increases-respiratory-syncytial-virus-clearance-in-vivo-and-prevents-vaccine-enhanced-diseases
#6
Hyo-Jeong Lee, Jeong-Yoon Lee, Min-Hee Park, Joo-Young Kim, Jun Chang
Respiratory syncytial virus (RSV) is a common cause of lower respiratory tract illness in infants, young children, and the elderly. The G glycoprotein plays a role in host cell attachment and also modulates the host immune response, thereby inducing disease pathogenesis. We generated two monoclonal antibodies (mAbs; 5H6 and 3A5) against G protein core fragment (Gcf), which consisted of amino acid residues 131 to 230 from RSV A2 G protein. Epitope mapping study revealed that 5H6 specifically binds to the G/164-176 peptide that includes conserved sequences shared by both RSV A and B subtypes, and 3A5 binds to the G/190-204 peptide...
2017: PloS One
https://www.readbyqxmd.com/read/28070870/defining-the-risk-and-associated-morbidity-and-mortality-of-severe-respiratory-syncytial-virus-infection-among-infants-with-congenital-heart-disease
#7
REVIEW
Paul A Checchia, Bosco Paes, Louis Bont, Paolo Manzoni, Eric A F Simões, Brigitte Fauroux, Josep Figueras-Aloy, Xavier Carbonell-Estrany
INTRODUCTION: The REGAL (RSV Evidence-a Geographical Archive of the Literature) series provide a comprehensive review of the published evidence in the field of respiratory syncytial virus (RSV) in Western countries over the last 20 years. This fourth publication covers the risk and burden of RSV infection in infants with congenital heart disease (CHD). METHODS: A systematic review was undertaken for articles published between January 1, 1995 and December 31, 2015 across PubMed, Embase, The Cochrane Library, and Clinicaltrials...
January 9, 2017: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/28065474/a-single-low-dose-of-a-cgmp-recombinant-bcg-vaccine-elicits-protective-t-cell-immunity-against-the-human-respiratory-syncytial-virus-infection-and-prevents-lung-pathology-in-mice
#8
Pablo F Céspedes, Emma Rey-Jurado, Janyra A Espinoza, Claudia A Rivera, Gisela Canedo-Marroquín, Susan M Bueno, Alexis M Kalergis
Human respiratory syncytial virus (hRSV) is a major health burden worldwide, causing the majority of hospitalizations in children under two years old due to bronchiolitis and pneumonia. HRSV causes year-to-year outbreaks of disease, which also affects the elderly and immunocompromised adults. Furthermore, both hRSV morbidity and epidemics are explained by a consistently high rate of re-infections that take place throughout the patient life. Although significant efforts have been invested worldwide, currently there are no licensed vaccines to prevent hRSV infection...
January 5, 2017: Vaccine
https://www.readbyqxmd.com/read/28064293/epidemiological-and-clinical-features-of-enteroviral-acute-lower-respiratory-tract-infections-in-hospitalized-paediatric-patients-in-a-malaysian-tertiary-center
#9
J W Y Tan, R Nuryasmin, Y Apandi, V Nethiya, H Hussin, A L Zuraidah
BACKGROUND: Human enteroviruses (HEVs) have been recognized to cause a significant number of respiratory tract infections in many regions. Previous studies conducted to analyse enteroviral respiratory tract infections focused on outbreaks. Data in the Southeast Asian region is still rather limited to date. OBJECTIVES: We conducted a prospective analysis to understand the epidemiological characteristics of enteroviral lower respiratory tract infections (LRTIs) among paediatric patients admitted to Hospital Ampang, a tertiary hospital in Malaysia...
October 2016: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28062161/-rapid-diagnostic-test-for-respiratory-infections
#10
José María Marimón, José María Navarro-Marí
Acute respiratory infections are the second cause of morbidity and mortality in children and adults worldwide, being viruses, bacteria and fungi involved in their etiology. The rapid diagnosis allows for a better clinical management of the patient, for adopting public health measures and for controlling possible outbreaks. The main etiologic agents can be diagnosed within the first hours after the onset of symptoms with antigen detection techniques, primarily immunochromatography. Results are obtained in 15-30minutes, with 70-90% sensitivity and >95% specificity for the diagnosis of Streptococcus pneumoniae and Legionella pneumophila serogroup O1 infections from urine, Streptococcus pyogenes from throat swabs and respiratory syncytial virus from nasopharyngeal aspirates...
January 3, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28058797/estimating-the-burden-of-respiratory-syncytial-virus-rsv-on-respiratory-hospital-admissions-in-children-less-than-five-years-of-age-in-england-2007-2012
#11
R M Reeves, P Hardelid, R Gilbert, F Warburton, J Ellis, R G Pebody
BACKGROUND: Respiratory syncytial virus (RSV) is a leading cause of hospital admission in young children. With several RSV vaccines candidates undergoing clinical trials, recent estimates of RSV burden are required to provide a baseline for vaccine impact studies. OBJECTIVES: To estimate the number of RSV-associated hospital admissions in children <5 years old in England over a 5-year period from 2007 using ecological time series modelling of national hospital administrative data...
January 6, 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/28040689/burden-of-healthcare-associated-viral-respiratory-infections-in-children-s-hospitals
#12
Caroline Quach, Rita Shah, Lorry G Rubin
OBJECTIVE: Although healthcare-associated (HA) viral respiratory infections (VRIs) are common in pediatrics, no benchmark for comparison exists. We aimed to determine, compare, and assess determinants of unit-specific HA-VRI incidence rates in 2 children's hospitals. METHODS: This study was a retrospective comparison of prospective cohorts. The Montreal Children's Hospital and the Cohen Children's Medical Center of New York perform prospective surveillance for HA-VRI using standardized definitions that require the presence of symptoms compatible with VRI and virus detection...
December 30, 2016: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28018859/autophagy-tgf-%C3%AE-and-smad-2-3-signaling-regulates-interferon-%C3%AE-response-in-respiratory-syncytial-virus-infected-macrophages
#13
Swechha M Pokharel, Niraj K Shil, Santanu Bose
Human respiratory syncytial virus (RSV) is a lung tropic virus causing severe airway diseases including bronchiolitis and pneumonia among infants, children, and immuno-compromised individuals. RSV triggers transforming growth factor-β (TGF-β) production from lung epithelial cells and TGF-β facilitates RSV infection of these cells. However, it is still unknown whether RSV infected myeloid cells like macrophages produce TGF-β and the role of TGF-β if any during RSV infection of these cells. Our study revealed that RSV infected macrophages produce TGF-β and as a consequence these cells activate TGF-β dependent SMAD-2/3 signaling pathway...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28018433/viral-agents-causing-acute-respiratory-infections-in-children-under-five-a-study-from-eastern-india
#14
Pravakar Mishra, Lipika Nayak, Rashmi Ranjan Das, Bhagirathi Dwibedi, Amitabh Singh
Background. Acute respiratory infections (ARIs) are important cause of mortality and morbidity in children under five in developing country. Methods. This observational study was conducted over two-year period in a tertiary care teaching hospital of Eastern India. Nasal and throat swabs were collected, transported to the laboratory at 2-8°C in viral transport media, and then processed for detection of viruses using mono/multiplex real-time polymerase chain reaction. Results. A total of 300 children aged 2-60 months with ARIs were included...
2016: International Journal of Pediatrics
https://www.readbyqxmd.com/read/28012809/prevalence-of-co-infection-between-respiratory-syncytial-virus-and-influenza-in-children
#15
Sarah D Meskill, Paula A Revell, Lakshmi Chandramohan, Andrea T Cruz
BACKGROUND: Respiratory syncytial virus (RSV) and influenza have varying degree of seasonal overlap. OBJECTIVE: To determine the prevalence of co-infection of RSV and influenza compared to the prevalence of those infections independently when both are in season. METHODS: This was a retrospective cross-sectional study of children evaluated between July 2010 and June 2013 for viral respiratory infection using multiplex PCR. Seasonality was defined retrospectively as weeks when >2% of the total annual positive tests were obtained and was calculated for influenza A, influenza B, and RSV independently...
December 8, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28005954/pneumovirus-induced-lung-disease-in-mice-is-independent-of-neutrophil-driven-inflammation
#16
Bart Cortjens, René Lutter, Louis Boon, Reinout A Bem, Job B M van Woensel
The human pneumovirus respiratory syncytial virus (RSV) is the most common pathogen causing lower respiratory tract disease in young children worldwide. A hallmark of severe human RSV infection is the strong neutrophil recruitment to the airways and lungs. Massive neutrophil activation has been proven detrimental in numerous diseases, yet in RSV the contribution of neutrophils to disease severity, and thereby, the relevance of targeting them, is largely unknown. To determine the relevance of potential neutrophil targeting therapies, we implemented antibody-mediated neutrophil depletion in a mouse pneumonia virus of mice (PVM) model...
2016: PloS One
https://www.readbyqxmd.com/read/28005688/respiratory-syncytial-virus-infection-associated-hospitalization-rates-in-infants-and-children-with-cystic-fibrosis
#17
Jakob Metz, Ernst Eber, Bernhard Resch
BACKGROUND: Infections with respiratory syncytial virus (RSV) are the leading cause for hospital admissions in infants and young children. The incidence of RSV-related hospitalizations in patients with cystic fibrosis (CF) is unclear. To date no effective treatment for RSV infections is available. Thus, prophylaxis with the monoclonal antibody palivizumab is an important option. METHODS: In a retrospective, single-center study at the Department of Paediatrics and Adolescent Medicine of the Medical University Graz, Austria, we analyzed all CF patients born between 1995 and 2012, who were admitted for respiratory problems between 1995 and 2014...
December 21, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28004017/development-of-a-multiplex-rt-pcr-for-simultaneous-diagnosis-of-human-metapneumovirus-hmpv-and-human-respiratory-syncytial-virus-hrsv-from-clinical-specimens
#18
Seetha Dayakar, Heera R Pillai, Vineetha P Thulasi, Radhakrishnan R Nair
Human metapneumovirus (HMPV) and human respiratory syncytial virus (HRSV) are ubiquitous respiratory viral pathogens. They belong to the family Paramyxoviridae (subfamily Pneumovirinae) and is responsible for acute respiratory tract infections in children, elderly and immunocompromised patients. We designed and tested a multiplex reverse transcriptase polymerase chain reaction (mRT-PCR) as a cost-effective alternative to real-time PCR and cell culture based detection for HMPV and HRSV. The newly developed PCR was used to screen nasal/throat swab samples from 356 patients with suspected acute respiratory infection attending the Government Medical College, Thiruvananthapuram, Kerala, India...
December 2016: Virusdisease
https://www.readbyqxmd.com/read/27989226/-after-the-epidemic-before-the-epidemic-incidence-of-bronchiolitis-at-the-pediatric-ward-of-the-b%C3%A3-cs-kiskun-county-hospital
#19
Zsófia Ábel, Bernadett Budinkity, Gábor Svorenj, Gyula Tálosi
INTRODUCTION: Bronchiolitis may cause severe respiratory insufficiency in infants and toddlers. Respiratory Syncytial Virus (RSV) is its most frequent infective agent. AIM AND METHOD: The authors surveyed the incidence of bronchiolitis during the last 6 seasons, examined the epidemic of the 2014/15 season and compared the groups of RSV positive and negative patients. RSV was tested with a quick essay. Anamnestic data, clinical and laboratory parameters were compared...
December 2016: Orvosi Hetilap
https://www.readbyqxmd.com/read/27974288/virus-like-particle-vaccine-by-intranasal-vaccination-elicits-protective-immunity-against-respiratory-syncytial-viral-infection-in-mice
#20
Mengying Cai, Cheng Wang, Yufeng Li, Hongjing Gu, Sujing Sun, Yueqiang Duan, Chengcai Lai, Keyu Wang, Xiaolan Yang, Li Xing, Peirui Zhang, Zhaohai Wang, Shaogeng Zhang, Xiaodong Guo, Shubing Liu, Yigang Tong, Xiliang Wang, Penghui Yang
Respiratory syncytial virus (RSV) is a leading cause of lower respiratory infection in infants and children, but there is still no licensed vaccine available. In this report, we developed virus-like particle (VLP) vaccines based on the Bac-to-Bac baculovirus expression system, consisting of an influenza virus matrix (M1) protein and the RSV fusion protein (F) or glycoprotein (G). These RSV VLPs were identified by western blot analysis and electron microscopy. Female BALB/c mice immunized intranasally (i.n.) with RSV-F VLPs, RSV-G VLPs, or both showed viral-specific antibody responses against RSV...
January 2017: Acta Biochimica et Biophysica Sinica
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