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RSV bronchiolitis

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https://www.readbyqxmd.com/read/28228284/respiratory-syncytial-virus-infects-regulatory-b-cells-in-human-neonates-via-chemokine-receptor-cx3cr1-and-promotes-lung-disease-severity
#1
Dania Zhivaki, Sébastien Lemoine, Annick Lim, Ahsen Morva, Pierre-Olivier Vidalain, Liliane Schandene, Nicoletta Casartelli, Marie-Anne Rameix-Welti, Pierre-Louis Hervé, Edith Dériaud, Benoit Beitz, Maryline Ripaux-Lefevre, Jordi Miatello, Brigitte Lemercier, Valerie Lorin, Delphyne Descamps, Jenna Fix, Jean-François Eléouët, Sabine Riffault, Olivier Schwartz, Fabrice Porcheray, Françoise Mascart, Hugo Mouquet, Xiaoming Zhang, Pierre Tissières, Richard Lo-Man
Respiratory syncytial virus (RSV) is the major cause of lower respiratory tract infections in infants and is characterized by pulmonary infiltration of B cells in fatal cases. We analyzed the B cell compartment in human newborns and identified a population of neonatal regulatory B lymphocytes (nBreg cells) that produced interleukin 10 (IL-10) in response to RSV infection. The polyreactive B cell receptor of nBreg cells interacted with RSV protein F and induced upregulation of chemokine receptor CX3CR1. CX3CR1 interacted with RSV glycoprotein G, leading to nBreg cell infection and IL-10 production that dampened T helper 1 (Th1) cytokine production...
February 21, 2017: Immunity
https://www.readbyqxmd.com/read/28193180/viral-aetiology-of-bronchiolitis-in-hospitalised-children-in-qatar
#2
Ibrahim Janahi, Anas Abdulkayoum, Fawziya Almeshwesh, Mohamed Alkuwari, Ahmed Al Hammadi, Marwah Alameri
BACKGROUND: Bronchiolitis is considered one of the earliest and most common causes of hospitalisation in young children. Development of molecular technologies allowed a better understanding of bronchiolitis aetiology. Results from cohort studies evaluating the association between single, multiple viral infections and clinical outcomes are conflicting. Data on viral bronchiolitis in children were found to be limited in Qatar. This study aimed to determine frequency and seasonal trends of viral pathogens causing acute bronchiolitis, and to explore association between viral pathogens, disease severity and length of stay (LOS)...
February 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28134915/structural-basis-for-antibody-cross-neutralization-of-respiratory-syncytial-virus-and-human-metapneumovirus
#3
Xiaolin Wen, Jarrod J Mousa, John T Bates, Robert A Lamb, James E Crowe, Theodore S Jardetzky
Respiratory syncytial virus (RSV) and human metapneumovirus (HMPV) are two closely related viruses that cause bronchiolitis and pneumonia in infants and the elderly(1), with a significant health burden(2-6). There are no licensed vaccines or small-molecule antiviral treatments specific to these two viruses at present. A humanized murine monoclonal antibody (palivizumab) is approved to treat high-risk infants for RSV infection(7,8), but other treatments, as well as vaccines, for both viruses are still in development...
January 30, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28124966/-a-case-of-bronchiolitis-obliterans-secondary-to-human-metapneumovirus-bronchiolitis
#4
Osman Yeşilbaş, Esra Şevketoğlu, Hasan Serdar Kıhtır, Mey Talip Petmezci, Elif Bato, Seda Balkaya, Nevin Hatipoğlu, Mert Ahmet Kuşkucu, Figen Palabıyık, Erkan Çakır
Human metapneumovirus (hMPV), formerly classified in Paramyxoviridae family is now moved into Pneumoviridae, which was described as a novel family. It causes upper and lower respiratory tract infections (LRTIs) usually in children younger than five years old. The recent epidemiological studies indicated that hMPV is the second most frequently detected virus in LRTIs of young children, following the respiratory syncytial virus (RSV). Bronchiolitis obliterans (BO) is a chronic obstructive lung disease characterized by fibrosis of the distal respiratory airways...
October 2016: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28104904/-prediction-of-severe-course-in-infants-with-rsv-bronchiolitis-under-6-months-spain
#5
José Miguel Ramos-Fernández, David Moreno-Pérez, Mario Gutiérrez-Bedmar, Alexandra Hernández-Yuste, Ana María Cordón-Martínez, Guillermo Milano-Manso, Antonio Urda-Cardona
OBJECTIVE: The need for mechanical ventilation (MV) in acute bronchiolitis (AB) by respiratory syncytial virus (RSV) varies depending on the series (6-18%). Our goal is to determine the admissions to PICU for MV in patients under 6 months with AB and define the risk factors for building a prediction model. METHODS: Retrospective study of patients younger than 6 months admitted by BA-VRS between the periods April 1, 2010 and March 31, 2015 was made. The primary variable was the admission to PICU for MV...
January 19, 2017: Revista Española de Salud Pública
https://www.readbyqxmd.com/read/28092107/rsv-associated-hospitalizations-in-children-in-karachi-pakistan-implications-for-vaccine-prevention-strategies
#6
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/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
#7
Rachel Melanie Reeves, Pia Hardelid, Ruth Gilbert, Fiona Warburton, Joanna Ellis, Richard 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 aged <5 years in England over a 5-year period from 2007 using ecological time series modelling of national hospital administrative data...
March 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/28029754/pulmonary-hemorrhage-as-a-complication-of-respiratory-syncyntial-virus-rsv-bronchiolitis
#8
Audrey K S Soo, David P Inwald
Respiratory Syncytial Virus (RSV) is a common cause of bronchiolitis. Although there are a number of recognized complications, pulmonary hemorrhage has not been reported previously. A retrospective case notes review was performed through an electronic search of a Pediatric Intensive Care Unit's medical records. Seven patients with RSV infection and pulmonary hemorrhage were identified and included in this case series. Six of the seven patients were born prematurely (30-36 weeks gestation). All patients required blood transfusion...
December 28, 2016: Pediatric Pulmonology
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
#9
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/27989226/-after-the-epidemic-before-the-epidemic-incidence-of-bronchiolitis-at-the-pediatric-ward-of-the-b%C3%A3-cs-kiskun-county-hospital
#10
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/27940684/cytokine-elevation-in-sudden-death-with-respiratory-syncytial-virus-a-case-report-of-2-children
#11
Yu Kakimoto, Yoshihisa Seto, Eriko Ochiai, Fumiko Satoh, Motoki Osawa
Respiratory syncytial virus (RSV) is the most common viral cause of bronchiolitis and pneumonia in young children worldwide. Premature birth, bronchopulmonary dysplasia, congenital heart disease, and Down syndrome are risk factors for high mortality and prolonged morbidity after RSV infection. Conversely, many previously healthy, full-term children are also admitted to the hospital because of RSV, and some of them experience severe sequelae or die due to the virus. Various complications of RSV infection have been reported, such as encephalopathy, encephalitis, and cardiomyopathy...
December 2016: Pediatrics
https://www.readbyqxmd.com/read/27940177/-use-of-high-flow-nasal-cannula-in-infants-with-bronchiolitis-in-a-pediatric-emergency-department
#12
M Guimaraes, M Pomedio, M Viprey, L Kanagaratnam, K Bessaci
High-flow nasal cannula oxygen therapy (HFNC) is a technique for noninvasive ventilation commonly used in pediatric intensive care units for respiratory distress, particularly in acute bronchiolitis. HFNC was introduced in the pediatric emergency department of the Reims university hospital for the treatment of infants with moderate to severe acute viral bronchiolitis. This retrospective observational study aimed to investigate the use of HFNC in a pediatric emergency ward, describing the groups of infants with acute viral bronchiolitis to be treated either with conventional oxygen therapy or with HFNC therapy...
January 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/27885562/respiratory-syncytial-virus-and-influenza-are-the-key-viral-pathogens-in-children-2%C3%A2-years-hospitalized-with-bronchiolitis-and-pneumonia-in-islamabad-pakistan
#13
Uzma Bashir, Nadia Nisar, Yasir Arshad, Muhammad Masroor Alam, Asiya Ashraf, Hajra Sadia, Birjees Mazher Kazi, Syed Sohail Zahoor Zaidi
Pneumonia remains a leading cause of morbidity and mortality in developing countries. Comprehensive surveillance data are needed to review the prevention and control strategies. We conducted active surveillance of acute lower respiratory infections among children aged <2 years hospitalized at two hospitals of Islamabad, Pakistan. Viral etiology was determined using real-time PCR on respiratory specimens collected during March 2011-April 2012. The overall mean age was 7.83 ± 5.25 months while no statistical difference between age or sex distribution of patients with positive and negative viral etiology (p > 0...
November 24, 2016: Archives of Virology
https://www.readbyqxmd.com/read/27873511/human-coronavirus-in-the-2014-winter-season-as-a-cause-of-lower-respiratory-tract-infection
#14
Kyu Yeun Kim, Song Yi Han, Ho Seong Kim, Hyang Min Cheong, Sung Soon Kim, Dong Soo Kim
PURPOSE: During the late autumn to winter season (October to December) in the Republic of Korea, respiratory syncytial virus (RSV) is the most common pathogen causing lower respiratory tract infections (LRTIs). Interestingly, in 2014, human coronavirus (HCoV) caused not only upper respiratory infections but also LRTIs more commonly than in other years. Therefore, we sought to determine the epidemiology, clinical characteristics, outcomes, and severity of illnesses associated with HCoV infections at a single center in Korea...
January 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/27850571/933-associations-between-pneumonia-and-clinical-outcomes-in-picu-patients-with-rsv-bronchiolitis
#15
Steven Shein, Michele Kong, Bryan McKee, Maryann O'Riordan, Adrienne Randolph
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27805553/-monoinfection-of-human-metapneumovirus-in-cordoba-first-clinical-and-epidemiological-research-in-children-with-respiratory-infection-in-2011
#16
Pamela Elizabeth Rodriguez, María Pilar Adamo, María Gabriela Paglini, Laura Moreno, Jorge Augusto Camara, Alicia Camara
: Human metapneumovirus (hMPV) RNA virus discovered in 2001, is a pathogen associated with acute respiratory infection (ARI) in children under 5 years; its prevalence ranges from 5-15%. In Córdoba, it is not integrated into the viral research in patients with low IRA (LARI). OBJECTIVE: Detect hMPV in children under 5 years hospitalized for LARI in the Children's Hospital "Santísima Trinidad" of Cordoba (HNC) in 2011 and describe the clinical and epidemiological characteristics of monoinfecciones without comorbidity...
2016: Revista de la Facultad de Ciencias Médicas
https://www.readbyqxmd.com/read/27798551/risk-factors-for-virus-induced-acute-respiratory-tract-infections-in-children-younger-than-3-years-and-recurrent-wheezing-at-36-months-follow-up-after-discharge
#17
Ambra Nicolai, Antonella Frassanito, Raffaella Nenna, Giulia Cangiano, Laura Petrarca, Paola Papoff, Alessandra Pierangeli, Carolina Scagnolari, Corrado Moretti, Fabio Midulla
BACKGROUND: We sought to know more about how 14 common respiratory viruses manifest clinically, and to identify risk factors for specific virus-induced acute respiratory tract infections (ARTIs) in children younger than 3 years old and for wheezing at 36-month follow-up. METHODS: We retrospectively studied the clinical records for 273 full-term children (median age, 2.9 months; range, 0.26-39; boys, 61.2%) hospitalized for ARTIs, whose nasopharyngeal specimen tested positive for a respiratory virus and 101 children with no history of respiratory diseases (median age, 8 months; range, 0...
February 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27793398/novel-expression-of-a-functional-trimeric-fragment-of-human-sp-a-with-efficacy-in-neutralisation-of-rsv
#18
Alastair Watson, Nina Kronqvist, C Mirella Spalluto, Mark Griffiths, Karl J Staples, Tom Wilkinson, Uffe Holmskov, Grith L Sorensen, Anna Rising, Jan Johansson, Jens Madsen, Howard Clark
Respiratory syncytial virus (RSV) is the leading cause of bronchiolitis and hospitalisation of infants in developed countries. Surfactant protein A (SP-A) is an important innate immune molecule, localized in pulmonary surfactant. SP-A binds to carbohydrates on the surface of pathogens in a calcium-dependent manner to enable neutralisation, agglutination and clearance of pathogens including RSV. SP-A forms trimeric units and further oligomerises through interactions between its N-terminal domains. Whilst a recombinant trimeric fragment of the closely related molecule (surfactant protein D) has been shown to retain many of the native protein's functions, the importance of the SP-A oligomeric structure in its interaction with RSV has not been determined...
February 2017: Immunobiology
https://www.readbyqxmd.com/read/27764220/epidemiology-and-clinical-presentations-of-respiratory-syncytial-virus-subgroups-a-and-b-detected-with-multiplex-real-time-pcr
#19
Wenkuan Liu, Dehui Chen, Weiping Tan, Duo Xu, Shuyan Qiu, Zhiqi Zeng, Xiao Li, Rong Zhou
Respiratory syncytial virus (RSV) is one of the most important pathogenic infections of children and requires in-depth research worldwide, and especially in developing countries. We used a novel multiplex real-time PCR to test 5483 patients (≤ 14 years old) hospitalized with respiratory illness in Guangzhou, China, over a 3-year period. Of these patients, 729 were positive for RSV-A (51.2%, 373/729) or RSV-B (48.8%, 356/729), but none was infected with both viruses. Two seasonal peaks in total RSV were detected at the changes from winter to spring and from summer to autumn...
2016: PloS One
https://www.readbyqxmd.com/read/27721865/retrospective-multicenter-study-of-respiratory-syncytial-virus-prophylaxis-in-korean-children-with-congenital-heart-diseases
#20
Ah Young Kim, Se Yong Jung, Jae Young Choi, Gi Beom Kim, Young-Hwue Kim, Woo Sup Shim, I-Seok Kang, Jo Won Jung
BACKGROUND AND OBJECTIVES: We conducted a review of current data on respiratory syncytial virus (RSV) prophylaxis with palivizumab, in Korean children with congenital heart diseases (CHD). In 2009, the Korean guideline for RSV prophylaxis had established up to five shots monthly per RSV season, only for children <1 year of age with hemodynamic significance CHD (HS-CHD). SUBJECTS AND METHODS: During the RSV seasons in 2009-2015, we performed a retrospective review of data for 466 infants with CHD, examined at six centers in Korea...
September 2016: Korean Circulation Journal
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