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RSV bronchiolitis

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https://www.readbyqxmd.com/read/28822433/-molecular-biological-and-clinical-characteristics-of-respiratory-syncytial-virus-in-children-with-bronchiolitis
#1
T H Zhang, J Deng, Y Qian, R N Zhu, Y Sun, F Wang, R Tian, L Q Zhao
Objective: To investigate the clinical characteristics of respiratory syncytial virus(RSV)bronchiolitis and molecular biological characteristics of RSV in children in Beijing. Method: In a systematic retrospective study, 2 296 nasopharyngeal aspirates (NPA) were collected from children diagnosed with bronchiolitis from July 2006 to June 2016 for respiratory virus screening using direct immunofluorescence assay (DFA). For specimens positive for RSV, subgroup A or B was confirmed by real time RT-PCR and genotype of RSV was determined by amplifying the full G glycoprotein gene and sequencing...
August 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28818563/-lower-lymphocyte-response-in-severe-cases-of-acute-bronchiolitis-due-to-respiratory-syncytial-virus
#2
José Miguel Ramos-Fernández, David Moreno-Pérez, Cristina Antúnez-Fernández, Guillermo Milano-Manso, Ana María Cordón-Martínez, Antonio Urda-Cardona
INTRODUCTION: Acute bronchiolitis (AB) of the infant has a serious outcome in 6-16% of the hospital admitted cases. Its pathogenesis and evolution is related to the response of the T lymphocytes. The objective of the present study is to determine if the lower systemic lymphocytic response is related to a worse outcome of AB in hospitalised infants. PATIENTS AND METHOD: Retrospective observational-analytical study of cases-controls nested in a cohort of patients admitted due to RSV-AB between the period from October 2010 to March 2015...
August 14, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28783078/respiratory-syncytial-virus-the-influence-of-serotype-and-genotype-variability-on-clinical-course-of-infection
#3
REVIEW
Silvia Vandini, Carlotta Biagi, Marcello Lanari
Respiratory syncytial virus (RSV) belongs to the recently defined Pneumoviridae family, Orthopneumovirus genus. It is the leading cause of acute bronchiolitis and one of the most common causes of infant viral death worldwide, with infection typically occurring as recurrent seasonal epidemics. There are two major RSV subtypes, A and B, and multiple genotypes, which can coexist during RSV epidemic season every year and result in different disease severity. Recently, new RSV genomic sequences and analysis of RSV genotypes have provided important data for understanding RSV pathogenesis...
August 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28782631/cdhr3-gene-variation-and-childhood-bronchiolitis
#4
A Husby, A Pasanen, J Waage, A Sevelsted, H Hodemaekers, R Janssen, M K Karjalainen, J Stokholm, B L Chawes, M Korppi, G Wennergren, A Heinzmann, L Bont, H Bisgaard, K Bønnelykke
This genetic study combining data from five countries shows that the CDHR3 rs6967330 polymorphism is not associated to bronchiolitis triggered by RSV but might increase risk of bronchiolitis triggered by other infectious agents.
August 3, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28751483/respiratory-syncytial-virus-a-systematic-scientometric-analysis-of-the-global-publication-output-and-the-gender-distribution-of-publishing-authors
#5
Dörthe Brüggmann, Corinna Köster, Doris Klingelhöfer, Jan Bauer, Daniela Ohlendorf, Matthias Bundschuh, David A Groneberg
OBJECTIVE: Worldwide, the respiratory syncytial virus (RSV) represents the predominant viral agent causing bronchiolitis and pneumonia in children. To conduct research and tackle existing healthcare disparities, RSV-related research activities around the globe need to be described. Hence, we assessed the associated scientific output (represented by research articles) by geographical, chronological and socioeconomic criteria and analysed the authors publishing in the field by gender. Also, the 15 most cited articles and the most prolific journals were identified for RSV research...
July 26, 2017: BMJ Open
https://www.readbyqxmd.com/read/28747496/parainfluenza-virus-5-piv5-expressing-wild-type-or-pre-fusion-respiratory-syncytial-virus-rsv-fusion-protein-protect-mice-and-cotton-rats-from-rsv-challenge
#6
Shannon I Phan, James R Zengel, Huiling Wei, Zhuo Li, Dai Wang, Biao He
Human respiratory syncytial virus (RSV) is the leading cause of pediatric bronchiolitis and hospitalizations. RSV can also cause severe complications in elderly and immunocompromised individuals. There is no licensed vaccine. We previously generated a PIV5-vectored vaccine candidate expressing the RSV fusion protein (F) that was immunogenic and protective in mice. In this work, our goal was to improve the original vaccine candidate by modifying the PIV5 vector or by modifying the RSV-F antigen. We previously demonstrated that inserting a foreign gene at the PIV5 SH-HN junction or deleting PIV5 SH increased vaccine efficacy...
July 26, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28695368/an-interaction-of-lps-and-rsv-infection-in-augmenting-the-ahr-and-airway-inflammation-in-mice
#7
Na Zhou, Wei Li, Luo Ren, Xiaohong Xie, Enmei Liu
Respiratory syncytial virus (RSV) is the leading cause of acute lower respiratory tract infection (LRTI) in children under 5 years of age, especially infants with severe bronchiolitis. Our preliminary clinical experiments showed that bacterial colonization was commonly observed in children with virus-induced wheezing, particularly in those with recurrent wheezing, suggesting that bacterial colonization with an accompanying viral infection may contribute to disease severity. In most cases, RSV-infected infants were colonized with pathogenic bacteria (mainly Gram-negative bacteria)...
July 10, 2017: Inflammation
https://www.readbyqxmd.com/read/28680946/etiology-seasonality-and-clinical-features-of-viral-respiratory-tract-infections-in-children-hospitalized-with-acute-bronchiolitis-a-single-center-study
#8
Şule Gökçe, Zafer Kurugöl, Güldane Koturoğlu, Candan Çiçek, Aslı Aslan
The purpose of this study was to evaluate the viral frequency, seasonality, and clinical and demographic features of patients hospitalized with acute bronchiolitis. A cross-sectional, descriptive study was performed in 316 infants younger than 2 years of age who were hospitalized for acute viral bronchiolitis. Respiratory tract infection agents were investigated with polymerase chain reaction (PCR). A total of 316 infants were included in this study. Of the 316 infants, at least one respiratory tract pathogen was detected in 75% (237/316)...
2017: Global Pediatric Health
https://www.readbyqxmd.com/read/28679075/first-report-of-immunohistochemical-detection-of-peste-des-petit-ruminants-parainfluenza-3-and-respiratory-syncytial-viral-antigens-in-lungs-of-nigerian-goats
#9
Theophilus Aghogho Jarikre, Benjamin Obukowho Emikpe
This study determined the of involvement of PPR, PI3, and RS viruses in the pathology of caprine pneumonia across Nigeria. 150 goats were selected randomly. PI3 and RSV monoclonal antibodies and PPR polyclonal antibody were used for the immunolocalization of the antigens. Histologically, 61 of the goats had broncho-interstitial pneumonia, 25 had interstitial pneumonia, 42 had bronchopneumonia, 12 had bronchiolitis, and 10 were normal. PPR, PI3, and RS viral antigens were demonstrated in: intact and desquamated bronchial, bronchiolar epithelial cells, macrophages, leukocytes, pneumocytes, and giant cells...
July 5, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28647513/respiratory-syncytial-virus-bronchiolitis-weather-conditions-and-air-pollution-in-an-italian-urban-area-an-observational-study
#10
Raffaella Nenna, Melania Evangelisti, Antonella Frassanito, Carolina Scagnolari, Alessandra Pierangeli, Guido Antonelli, Ambra Nicolai, Serena Arima, Corrado Moretti, Paola Papoff, Maria Pia Villa, Fabio Midulla
BACKGROUND: In this study we sought to evaluate the association between viral bronchiolitis, weather conditions, and air pollution in an urban area in Italy. METHODS: We included infants hospitalized for acute bronchiolitis from 2004 to 2014. All infants underwent a nasal washing for virus detection. A regional agency network collected meteorological data (mean temperature, relative humidity and wind velocity) and the following air pollutants: sulfur dioxide, nitrogen oxide, carbon monoxide, ozone, benzene and suspended particulate matter measuring less than 10µm (PM10) and less than 2...
June 22, 2017: Environmental Research
https://www.readbyqxmd.com/read/28643443/national-high-flow-nasal-cannula-and-bronchiolitis-survey-highlights-need-for-further-research-and-evidence-based-guidelines
#11
Paula Sokuri, Paula Heikkilä, Matti Korppi
AIM: High-flow nasal cannula (HFNC) therapy provides noninvasive respiratory support for infant bronchiolitis and its use has increased following good clinical experiences. This national study describes HFNC use in Finland during a severe respiratory syncytial virus (RSV) epidemic. METHODS: A questionnaire on using HFNC for infant bronchiolitis during the 2015-2016 RSV epidemic was sent to the head physicians of 18 Finnish children's hospitals providing inpatient care for infants: 17 hospitals answered, covering 77...
June 23, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28639594/viral-aetiology-of-wheezing-in-children-under-five
#12
Prithi Sureka Mummidi, Radha Tripathy, Bhagirathi Dwibedi, Amarendra Mahapatra, Suryakanta Baraha
BACKGROUND & OBJECTIVES: Wheezing is a common problem in children under five with acute respiratory infections (ARIs). Viruses are known to be responsible for a considerable proportion of ARIs in children. This study was undertaken to know the viral aetiology of wheezing among the children less than five years of age, admitted to a tertiary care hospital in eastern India. METHODS: Seventy five children, under the age of five years admitted with wheezing, were included in the study...
February 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28605249/product-review-on-the-monoclonal-antibody-palivizumab-for-prevention-of-respiratory-syncytial-virus-infection
#13
Bernhard Resch
Respiratory syncytial virus (RSV) accounts for about 20% of all respiratory infections in children below the age of 5 y. It is associated with up to 63% of all acute respiratory infections and up to 81% of all viral lower respiratory tract infections causing hospitalization in infants and young children. RSV leads to seasonal epidemics between November and April in the northern hemisphere. Most severe infections (RSV accounts for 50 to 80% of all cause bronchiolitis) affect infants younger than 6 months of age and high-risk infants including those born preterm with or without bronchopulmonary dysplasia and those with hemodynamically significant congenital heart disease up to an age of 24 months...
June 12, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28571896/-short-term-relevance-of-lower-respiratory-viral-coinfection-in-inpatients-under-2-years-of-age
#14
Joana Gil, Sofia Almeida, Carolina Constant, Sara Pinto, Rosário Barreto, José Melo Cristino, Maria do Céu Machado, Teresa Bandeira
INTRODUCTION: Advances in molecular diagnosis have made it possible to detect previously unknown viral agents as causative agents of lower respiratory tract infections (LRTI). The frequency and relevance of viral coinfections is still debatable. OBJECTIVE: compare clinical presentation and severity between single virus infection and viral coinfection in children admitted for LRTI. METHODS: A 3-year period observational study (2012-2015) included children younger than two years admitted for LRTI...
May 29, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28570692/natural-killer-t-cell-sensitization-during-neonatal-respiratory-syncytial-virus-infection-induces-eosinophilic-lung-disease-in-re-infected-adult-mice
#15
Seung Young Lee, Youran Noh, Jung Hyun Goo, Semi Rho, Min Jung Kim, Chang-Yuil Kang, Manki Song, Jae-Ouk Kim
Respiratory syncytial virus (RSV) is a major viral pathogen that causes severe lower respiratory tract infections in infants and the elderly worldwide. Infants with severe RSV bronchiolitis tend to experience more wheezing and asthma in later childhood. Because invariant natural killer T (iNKT) cells are associated with the asthma pathology, we investigated whether neonatal iNKT cells are involved in the aggravation of pulmonary diseases following RSV infection in mice. Intranasal exposure to the iNKT cell ligand α-galactosylceramide (α-GC) with RSV primary infection in neonatal mice elicited neither cytokine production (except for a slight increase of IL-5) nor pulmonary eosinophilia, despite the presence of both CD1d+ cells and NKT cells...
2017: PloS One
https://www.readbyqxmd.com/read/28559125/respiratory-syncytial-virus-and-rhinovirus-related-bronchiolitis-in-children-aged-2-years-in-an-english-district-general-hospital
#16
S P Paul, A Mukherjee, T McAllister, M J Harvey, B A Clayton, P C Turner
BACKGROUND: Bronchiolitis is the most common reason for hospitalization in young children. In addition to respiratory syncytial virus (RSV), other viruses have been increasingly implicated. Guidance on testing has also changed. AIMS: To compare clinicopathological outcomes in young children admitted with bronchiolitis due to RSV in comparison with rhinovirus (RV), and identify associated risk/epidemiological factors. METHODS: Children aged less than two years admitted to hospital with a clinical diagnosis of bronchiolitis with positive results for either RSV or RV were included in this study...
May 3, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28541502/serum-ll-37-level-is-associated-with-severity-of-bronchiolitis-and-viral-etiology
#17
Jonathan M Mansbach, Kohei Hasegawa, Nadim J Ajami, Joseph F Petrosino, Pedro A Piedra, Courtney N Tierney, Janice A Espinola, Carlos A Camargo
Background: LL-37 is a host defense peptide with antimicrobial and immunomodulatory properties. We examined the relation of serum LL-37 levels to the severity of bronchiolitis and viral etiology. Methods: We performed a 17-center prospective cohort study of infants hospitalized with bronchiolitis over 3 winters (2011-2014). Site teams collected clinical data, nasopharyngeal aspirates (NPA) and serum. We used real-time PCR to test NPAs for 16 viruses. We tested serum for LL-37...
May 24, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28539639/the-absence-of-interferon-%C3%AE-promotor-stimulator-1-ips-1-predisposes-to-bronchiolitis-and-asthma-like-pathology-in-response-to-pneumoviral-infection-in-mice
#18
Jennifer Simpson, Jason P Lynch, Zhixuan Loh, Vivian Zhang, Rhiannon B Werder, Kirsten Spann, Simon Phipps
Respiratory syncytial virus (RSV)-bronchiolitis is a major cause of infant morbidity and mortality and a risk factor for subsequent asthma. We showed previously that toll-like receptor (TLR)7 in plasmacytoid dendritic cells (pDCs) is critical for protection against bronchiolitis and asthma in mice infected with pneumonia virus of mice (PVM), the mouse homolog of RSV. This lack of redundancy was unexpected as interferon-β promotor stimulator-1 (IPS-1) signalling, downstream of RIG-I-like receptor (RLR) and not TLR7 activation, contributes to host defence in hRSV-inoculated adult mice...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28506664/heliox-delivered-by-high-flow-nasal-cannula-improves-oxygenation-in-infants-with-respiratory-syncytial-virus-acute-bronchiolitis
#19
Wael Seliem, Amira M Sultan
OBJECTIVE: The objective of this study is to evaluate the hypothesis that use of heliox would result in improvement of gas exchange when used with high flow nasal cannula in infants with RSV acute bronchiolitis. METHODS: All patients that met the inclusion criteria were randomized to either heliox (70:30) or air-oxygen mixture 30% via high flow nasal cannula at 8L/min for a continuous 24h. Measurements were taken at baseline, after 2h, and at the end of the 24h...
May 12, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28502165/grape-seed-proanthocyanidin-inhibits-mucin-synthesis-and-viral-replication-by-suppression-of-ap-1-and-nf-%C3%AE%C2%BAb-via-p38-mapks-jnk-signaling-pathways-in-respiratory-syncytial-virus-infected-a549-cells
#20
Jin-Woo Lee, Young Il Kim, Chang-Nim Im, Sung Wan Kim, Su Jin Kim, Seoyeon Min, Yong Hoon Joo, Sung-Vin Yim, Namhyun Chung
Airway epithelial cells are often infected by respiratory syncytial virus (RSV), one of the most common causes of asthma, bronchiolitis, chronic obstructive pulmonary disease, and pneumonia. During the infection process, excessive mucins instigate airway inflammation. However, the mechanism underlying RSV-induced airway hyper-responsiveness and inflammation is poorly understood. Furthermore, no reliable vaccines or drugs for antiviral therapy are available. In this study, the effect of the natural compound grape seed proanthocyanidin (GSP) on RSV-infected human airway epithelial cells A549 was evaluated...
June 7, 2017: Journal of Agricultural and Food Chemistry
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