scholarly journals Respiratory Syncytial Virus and Metapneumovirus Infection Have Different Clinical Presentation in Children

2021 ◽  
Author(s):  
Jonathan Illan Montero ◽  
Alice Berger ◽  
Jack Levy ◽  
Laurent Busson ◽  
Marc Hainaut ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Pediatric Intensive Care ◽  
Viral Culture ◽  
Centre Hospitalier Universitaire ◽  
Hmpv Infection ◽  
Common Causes ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Pediatric Infections ◽  
Tract Infections

Abstract Respiratory syncytial virus (RSV) and Human metapneumovirus (hMPV), members of Pneumoviridae family are common causes of acute respiratory tract infections (ARTI) among children. Study material includes routine nasopharyngeal samples obtained during 8-year period for hMPV and one single season for RSV in children aged 0 to 15 years at the Centre Hospitalier Universitaire (CHU) Saint Pierre in Brussels. Positive samples for RSV or hMPV identified by viral culture, lateral flow chromatography test for RSV or direct fluorescent assay for hMPV were selected retrospectively. The medical charts of these patients were reviewed. Hospitalization rate was 37% (219/591) and 39% (187/476) for hMPV and RSV respectively. Children hospitalized for RSV infection were significantly younger and more dyspneic, requiring more respiratory support, longer hospital stay and transfers in Pediatric intensive Care Units (PICU) than those hospitalized for hMPV infection. Pneumonia diagnostic and antibiotics therapies were more significantly associated with hMPV infections.In conclusion, despite their genetic similarities, RSV and hMPV present epidemiological and clinical differences in pediatric infections.

Reappraisal of respiratory syncytial virus as an aetiology of severe acute lower respiratory tract infections in children younger than 5 years in Nigeria

2019 ◽  
Vol 113 (8) ◽  
pp. 446-452
Author(s):  
Damilola M Oladele ◽  
Dimeji P Oladele ◽  
Rasheedat M Ibraheem ◽  
Mohammed B Abdulkadir ◽  
Rasaki Adewole Raheem ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Respiratory Tract ◽  
Lower Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Preventive Strategy ◽  
Lower Respiratory Tract Infections ◽  
Cross Sectional ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Tract Infections

Abstract Background Acute lower respiratory tract infections (ALRIs) especially severe ALRIs, constitute a global high burden of morbidity and mortality in children <5 y of age and respiratory syncytial virus (RSV) has been documented to a play a major aetiological role. However, Nigerian reports on severe childhood RSV ALRIs are rare and most reports are old. With recent advances in RSV preventive strategy, arises the need for a recent appraisal of RSV infection in children with severe ALRI. The current study thus set out to determine the prevalence of RSV infection among hospitalized children <5 y of age and describe the related social determinants. Methods We performed a descriptive cross-sectional study conducted over 1 y of 120 children, ages 2–59 months, diagnosed with ALRI. Relevant data were obtained and an antigen detection assay was used for viral studies. Results The prevalence of RSV infection was 34.2% and its peak was in the rainy months. The proportion of infants in the RSV-positive group was significantly higher than that in the RSV-negative group (82.9% vs 54.4%; p=0.002). These findings were largely consistent with those of earlier reports. Conclusions RSV has remained a common cause of severe ALRI in infants, especially during the rainy months in Nigeria. It is thus suggested that more effort be focused towards implementing the current global recommendations for the prevention of RSV-associated LRI, particularly in infants.

scholarly journals Chemokine regulation of inflammation during respiratory syncytial virus infection

F1000Research ◽  
2019 ◽  
Vol 8 ◽  
pp. 1837 ◽  
Author(s):  
Rinat Nuriev ◽  
Cecilia Johansson
Keyword(s):  
Respiratory Syncytial Virus ◽  
The Elderly ◽  
Infection Process ◽  
Viral Control ◽  
Small Proteins ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Tract Infections ◽  
Developed World ◽  
Immune Detection

Respiratory syncytial virus (RSV) can cause severe lower respiratory tract infections especially in infants, immunocompromised individuals and the elderly and is the most common cause of infant hospitalisation in the developed world. The immune responses against RSV are crucial for viral control and clearance but, if dysregulated, can also result in immunopathology and impaired gas exchange. Lung immunity to RSV and other respiratory viruses begins with the recruitment of immune cells from the bloodstream into the lungs. This inflammatory process is controlled largely by chemokines, which are small proteins that are produced in response to innate immune detection of the virus or the infection process. These chemokines serve as chemoattractants for granulocytes, monocytes, lymphocytes and other leukocytes. In this review, we highlight recent advances in the field of RSV infection and disease, focusing on how chemokines regulate virus-induced inflammation.

Retrospective Review of Clinical and Chest X-Ray Findings in Children Admitted to a Community Hospital for Respiratory Syncytial Virus Infection

2018 ◽  
Vol 57 (14) ◽  
pp. 1686-1692 ◽  
Author(s):  
Denver Niles ◽  
Brett Larsen ◽  
Arvind Balaji ◽  
Dana Delaney ◽  
Elizabeth Campos ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Pediatric Intensive Care ◽  
Clinical Findings ◽  
X Rays ◽  
Radiological Findings ◽  
X Ray ◽  
Severe Group ◽  
Rsv Infection ◽  
Chest X Ray ◽  
Syncytial Virus

Introduction. We performed a retrospective study to evaluate demographics, clinical course, outcome, and radiological findings of children with respiratory syncytial virus (RSV) infection. Methods. Four hundred patients admitted between October 2013 and May 2016 were enrolled. Clinical and radiographic trends were evaluated for association with severity of RSV presentation. Severity was defined as hospitalization >2 days, pediatric intensive care unit admission, or need for mechanical ventilation. Results. Common clinical findings included fever (78.5%), coughing (97%), rhinorrhea/congestion (93%), and hypoxia (44.8%). Hypoxia was seen in 64.7% of the severe group compared with 32.0% in the nonsevere group ( P < .001). Airspace opacification was seen in 49.2% of chest X-rays of the severe group compared with 26.4% in the nonsevere group ( P < .001). Conclusion. Higher incidence of hypoxia or airspace opacification on chest X-ray may be predictors of poorer outcomes for patients with RSV infection.

scholarly journals Epidemiology of Respiratory Syncytial Virus-Related Hospitalization Over a 5-Year Period in Italy: Evaluation of Seasonality and Age Distribution Before Vaccine Introduction

Vaccines ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 15
Author(s):  
Federica Barbati ◽  
Maria Moriondo ◽  
Laura Pisano ◽  
Elisa Calistri ◽  
Lorenzo Lodi ◽  
...  
Keyword(s):  
Intensive Care ◽  
Respiratory Syncytial Virus ◽  
Age Distribution ◽  
Vaccine Introduction ◽  
Herd Protection ◽  
Infection Risk Factors ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Italian Children ◽  
Tract Infections

Respiratory Syncytial Virus (RSV) is associated with most of the acute viral respiratory tract infections causing hospitalization with a peak during the first months of life. Many clinical trials of RSV vaccine candidates are being carried out. The aim of this study was to obtain epidemiologic information to give suggestions on target populations and prevention strategies before the introduction of new vaccines or monoclonal antibodies. We retrospectively evaluated, over a 5-year period (September 2014–August 2019), a population of hospitalized Italian children aged 0–6 years with a laboratory confirmed diagnosis of RSV infection. Risk factors, seasonality of RSV infection, distribution according to age, cases of coinfections and reinfections and cases needing Intensive Care Unit were evaluated. Hospitalizations due to RSV were 624 in the period under study. The peak was found between November and April, with 80.4% of cases recorded between December and February. 62.5% of cases were found in children under three months of age and 41% in children under 30 days old. The need for intensive care was associated with younger ages, with 70.9% of cases in children below three months of age. Unless the incoming vaccines demonstrate a strong herd protection effect, preventive strategies should be aimed at newborns or at maternal immunization.

scholarly journals A Cross-Study Biomarker Signature of Human Bronchial Epithelial Cells Infected with Respiratory Syncytial Virus

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Luiz Gustavo Gardinassi
Keyword(s):  
Functional Analysis ◽  
Respiratory Syncytial Virus ◽  
Bronchial Epithelial Cell ◽  
Epithelial Cell Line ◽  
Bronchial Epithelial ◽  
Rsv Infection ◽  
Novel Biomarkers ◽  
Syncytial Virus ◽  
Different Strains ◽  
Tract Infections

Respiratory syncytial virus (RSV) is a major cause of lower respiratory tract infections in children, elderly, and immunocompromised individuals. Despite of advances in diagnosis and treatment, biomarkers of RSV infection are still unclear. To understand the host response and propose signatures of RSV infection, previous studies evaluated the transcriptional profile of the human bronchial epithelial cell line—BEAS-2B—infected with different strains of this virus. However, the evolution of statistical methods and functional analysis together with the large amount of expression data provide opportunities to uncover novel biomarkers of inflammation and infections. In view of those facts publicly available microarray datasets from RSV-infected BEAS-2B cells were analyzed with linear model-based statistics and the platform for functional analysis InnateDB. The results from those analyses argue for the reevaluation of previously reported transcription patterns and biological pathways in BEAS-2B cell lines infected with RSV. Importantly, this study revealed a biosignature constituted by genes such asABCC4,ARMC8,BCLAF1,EZH1,FAM118A,FAM208B,FUS,HSPH1,KAZN,MAP3K2,N6AMT1,PRMT2,S100PBP,SERPINA1,TLK2,ZNF322, andZNF337which should be considered in the development of new molecular diagnosis tools.

scholarly journals Nasopharyngeal gene expression, a novel approach to study the course of respiratory syncytial virus infection

2014 ◽  
Vol 45 (3) ◽  
pp. 718-725 ◽  
Author(s):  
Corné H. van den Kieboom ◽  
Inge M.L. Ahout ◽  
Aldert Zomer ◽  
Kim H. Brand ◽  
Ronald de Groot ◽  
...  
Keyword(s):  
Gene Expression ◽  
Respiratory Syncytial Virus ◽  
Respiratory Tract ◽  
Pathogen Detection ◽  
Severe Disease ◽  
Host Gene ◽  
Host Gene Expression ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Tract Infections

Respiratory syncytial virus (RSV) causes mild infections in the vast majority of children. However, in some cases, it causes severe disease, such as bronchiolitis and pneumonia. Development of severe RSV infection is determined by the host response. Therefore, the main aim of this study was to identify biomarkers associated with severe RSV infection.To identify biomarkers, nasopharyngeal gene expression was profiled by microarray studies, resulting in the selection of five genes: ubiquitin D, tetraspanin 8, mucin 13, β-microseminoprotein and chemokine ligand 7.These genes were validated by real-time quantitative PCR in an independent validation cohort, which confirmed significant differences in gene expression between mildly and severely infected and between recovery and acute patients.Nasopharyngeal aspirate samples are regularly taken when a viral respiratory tract infection is suspected. In this article, we describe a method to discriminate between mild and severe RSV infection based on differential host gene expression. The combination of pathogen detection and host gene expression analysis in nasopharyngeal aspirates will significantly improve the diagnosis and prognosis of respiratory tract infections.

scholarly journals Long Noncoding RNA NRAV Promotes Respiratory Syncytial Virus Replication by Targeting the MicroRNA miR-509-3p/Rab5c Axis To Regulate Vesicle Transportation

2020 ◽  
Vol 94 (10) ◽  
Author(s):  
Jian Li ◽  
Miao Li ◽  
Xiuli Wang ◽  
Mengfei Sun ◽  
Cuiqing Ma ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Long Noncoding Rna ◽  
Noncoding Rna ◽  
Respiratory Virus ◽  
Antiviral Response ◽  
Negative Regulator ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Tract Infections

ABSTRACT Respiratory syncytial virus (RSV) is an enveloped RNA virus which is responsible for approximately 80% of lower respiratory tract infections in children. Current lines of evidence have supported the functional involvement of long noncoding RNA (lncRNA) in many viral infectious diseases. However, the overall biological effect and clinical role of lncRNAs in RSV infection remain unclear. In this study, lncRNAs related to respiratory virus infection were obtained from the lncRNA database, and we collected 144 clinical sputum specimens to identify lncRNAs related to RSV infection. Quantitative PCR (qPCR) detection indicated that the expression of lncRNA negative regulator of antiviral response (NRAV) in RSV-positive patients was significantly lower than that in uninfected patients, but lncRNA psoriasis-associated non-protein coding RNA induced by stress (PRINS), nuclear paraspeckle assembly transcript 1 (NEAT1), and Nettoie Salmonella pas Theiler’s (NeST) showed no difference in vivo and in vitro. Meanwhile, overexpression of NRAV promoted RSV proliferation in A549 and BEAS-2B cells, and vice versa, indicating that the downregulation of NRAV was part of the host antiviral defense. RNA fluorescent in situ hybridization (FISH) confirmed that NRAV was mainly located in the cytoplasm. Through RNA sequencing, we found that Rab5c, which is a vesicle transporting protein, showed the same change trend as NRAV. Subsequent investigation revealed that NRAV was able to favor RSV production indirectly by sponging microRNA miR-509-3p so as to release Rab5c and facilitate vesicle transportation. The study provides a new insight into virus-host interaction through noncoding RNA, which may contribute to exploring potential antivirus targets for respiratory virus. IMPORTANCE The mechanism of interaction between RSV and host noncoding RNAs is not fully understood. In this study, we found that the expression of long noncoding RNA (lncRNA) negative regulator of antiviral response (NRAV) was reduced in RSV-infected patients, and overexpression of NRAV facilitated RSV production in vitro, suggesting that the reduction of NRAV in RSV infection was part of the host antiviral response. We also found that NRAV competed with vesicle protein Rab5c for microRNA miR509-3p in cytoplasm to promote RSV vesicle transport and accelerate RSV proliferation, thereby improving our understanding of the pathogenic mechanism of RSV infection.

Respiratory Syncytial Virus (RSV) Infections in Immunocompromized Children.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 5300-5300
Author(s):  
Alan Kwok Shing Chiang ◽  
Godfrey Chi Fung Chan ◽  
Shau Yin Ha ◽  
Kwok Hung Chan
Keyword(s):  
Respiratory Syncytial Virus ◽  
Clinical Symptoms ◽  
Bone Marrow Failure ◽  
Severe Pneumonia ◽  
Viral Clearance ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
The Individual ◽  
Tract Infections ◽  
Oncology Unit

Abstract Eleven children who were immunocompromized due to chemotherapy were infected with respiratory syncytial virus (RSV) during an outbreak of RSV infection in the Pediatric Oncology Unit of Queen Mary Hospital, The University of Hong Kong. The clinical symptoms, effect on treatment regimen, outcome of infection and viral clearance had been followed prospectively in all 11 children. Viral clearance was documented by immunofluorescence and PCR studies of nasopharyngeal aspirates or nasal/throat swabs. Eight of the 11 children had upper respiratory symptoms with the remaining 3 patients progressing to lower respiratory tract infections (LRTI). All except one had protracted viral symptoms but eventually recovered without the need for specific anti-viral treatment or intensive support. However, the chemotherapy regimen or scheduled BMT had been significantly interrupted. One patient developed progressively severe pneumonia which was further complicated by adenovirus reactivation causing bone marrow failure and severe sepsis resulting in death of this patient. The viral clearance of RSV was delayed in all patients with median of 20 days (range 9–81 days). One patient had recurrence of RSV detected by PCR 35 days after intial documentation of clearance, after a BMT procedure. The delayed viral clearance correlated with protracted viral symptoms. In conclusion, RSV clearance is delayed in immunocompromized hosts causing protracted viral symptoms, progression to LRTI and interruption to chemotherapy treatment. The delay in viral clearance appears proportional to the degree of immunosuppression of the individual.

scholarly journals Identification of NF-κB-Dependent Gene Networks in Respiratory Syncytial Virus-Infected Cells

2002 ◽  
Vol 76 (13) ◽  
pp. 6800-6814 ◽  
Author(s):  
Bing Tian ◽  
Yuhong Zhang ◽  
Bruce A. Luxon ◽  
Roberto P. Garofalo ◽  
Antonella Casola ◽  
...  
Keyword(s):  
Gene Expression ◽  
Respiratory Syncytial Virus ◽  
Gene Networks ◽  
Nuclear Translocation ◽  
Constitutive Expression ◽  
Dominant Negative ◽  
Expression Levels ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Tract Infections

ABSTRACT Respiratory syncytial virus (RSV) is a mucosa-restricted virus that is a leading cause of epidemic respiratory tract infections in children. In epithelial cells, RSV replication activates nuclear translocation of the inducible transcription factor nuclear factor κB (NF-κB) through proteolysis of its cytoplasmic inhibitor, IκB. In spite of a putative role in mediating virus-inducible gene expression, the spectrum of NF-κB-dependent genes induced by RSV infection has not yet been determined. To address this, we developed a tightly regulated cell system expressing a nondegradable, epitope-tagged IκBα isoform (Flag-IκBα Mut) whose expression could be controlled by exogenous addition of nontoxic concentrations of doxycycline. Flag-IκBα Mut expression potently inhibited IκBα proteolysis, NF-κB binding, and NF-κB-dependent gene transcription in cells stimulated with the prototypical NF-κB-activating cytokine tumor necrosis factor alpha (TNF-α) and in response to RSV infection. High-density oligonucleotide microarrays were then used to profile constitutive and RSV-induced gene expression in the absence or presence of Flag-IκBα Mut. Comparison of these profiles revealed 380 genes whose expression was significantly changed by the dominant-negative NF-κB. Of these, 236 genes were constitutive (not RSV regulated), and surprisingly, only 144 genes were RSV regulated, representing numerically ∼10% of the total population of RSV-inducible genes at this time point. Hierarchical clustering of the 144 RSV- and Flag-IκBα Mut-regulated genes identified two discrete gene clusters. The first group had high constitutive expression, and its expression levels fell in response to RSV infection. In this group, constitutive mRNA expression was increased by Flag-IκBα Mut expression, and the RSV-induced decrease in expression was partly inhibited. In the second group, constitutive expression was very low (or undetectable) and, after RSV infection, expression levels strongly increased. In this group, NF-κB was required for RSV-inducible expression because Flag-IκBα Mut expression blocked their induction by RSV. This latter cluster includes chemokines, transcriptional regulators, intracellular proteins regulating translation and proteolysis, and secreted proteins (complement components and growth factor regulators). These data suggest that NF-κB action induces global cellular responses after viral infection.

scholarly journals IFI27 may predict and evaluate the severity of respiratory syncytial virus infection in preterm infants

Hereditas ◽  
2021 ◽  
Vol 158 (1) ◽  
Author(s):  
Junyan Gao ◽  
Xueping Zhu ◽  
Mingfu Wu ◽  
Lijun Jiang ◽  
Fudong Wang ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Preterm Infants ◽  
Gene Set Enrichment Analysis ◽  
High Expression ◽  
Hub Genes ◽  
Blood Samples ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Clinical Verification ◽  
Tract Infections

Abstract Background Preterm infants are a special population that vulnerable to respiratory syncytial virus (RSV) infection and the lower respiratory tract infections (LRTIs) caused by RSV could be severe and even life-threating. The purpose of the present study was to identify candidate genes of preterm infants who are susceptible to RSV infection and provide a new insight into the pathogenesis of RSV infection. Methods Three datasets (GSE77087, GSE69606 and GSE41374) containing 183 blood samples of RSV infected patients and 33 blood samples of healthy controls from Gene Expression Omnibus (GEO) database were downloaded and the differentially expressed genes (DEGs) were screened out. The function and pathway enrichments were analyzed through Database for Annotation, Visualization and Integrated Discovery (DAVID) website. The protein-protein interaction (PPI) network for DEGs was constructed through Search Tool for the Retrieval of Interacting Genes (STRING). The module analysis was performed by Cytoscape software and hub genes were identified. Clinical verification was employed to verify the expression level of top five hub genes among 72 infants including 50 RSV infected patients and 22 non-RSV-infected patients hospitalized in our center. Further, the RSV infected infants with high-expression IFI27 and those with low-expression IFI27 were compared (defined as higher or lower than the median mRNA level). Finally, the gene set enrichment analysis (GSEA) focusing on IFI27 was carried out. Results Totally, 4028 DEGs were screened out and among which, 131 most significant DEGs were selected. Subsequently, 13 hub genes were identified, and function and pathway enrichments of hub genes mainly were: response to virus, defense response to virus, regulation of viral genome replication and regulation of viral life cycle. Furthermore, IFI27 was confirmed to be the most significantly expressed in clinical verification. Gene sets associated with calcium signaling pathway, arachidonic acid metabolism, extracellular matrix receptor interaction and so on were significantly enriched when IFI27 was highly expressed. Moreover, high-expression IFI27 was associated with more severe cases (p = 0.041), more requirements of mechanical ventilation (p = 0.034), more frequent hospitalization (p < 0.001) and longer cumulative hospital stay (p = 0.012). Conclusion IFI27 might serve to predict RSV infection and evaluate the severity of RSV infection in preterm infants.

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