scholarly journals Immune Dysregulation and the Increased Risk of Complications and Mortality Following Respiratory Tract Infections in Adults With Down Syndrome

2021 ◽  
Vol 12 ◽  
Author(s):  
Tomer Illouz ◽  
Arya Biragyn ◽  
Maria Florencia Iulita ◽  
Lisi Flores-Aguilar ◽  
Mara Dierssen ◽  
...  
Keyword(s):  
Down Syndrome ◽  
Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Chronic Respiratory Disease ◽  
Severe Illness ◽  
The Past ◽  
Increased Risk ◽  
Syncytial Virus ◽  
Tract Infections ◽  
Complications And Mortality

The risk of severe outcomes following respiratory tract infections is significantly increased in individuals over 60 years, especially in those with chronic medical conditions, i.e., hypertension, diabetes, cardiovascular disease, dementia, chronic respiratory disease, and cancer. Down Syndrome (DS), the most prevalent intellectual disability, is caused by trisomy-21 in ~1:750 live births worldwide. Over the past few decades, a substantial body of evidence has accumulated, pointing at the occurrence of alterations, impairments, and subsequently dysfunction of the various components of the immune system in individuals with DS. This associates with increased vulnerability to respiratory tract infections in this population, such as the influenza virus, respiratory syncytial virus, SARS-CoV-2 (COVID-19), and bacterial pneumonias. To emphasize this link, here we comprehensively review the immunobiology of DS and its contribution to higher susceptibility to severe illness and mortality from respiratory tract infections.

scholarly journals Predictors of community acquired childhood pneumonia among 2–59 months old children in the Amhara Region, Ethiopia

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Muluken Genetu Chanie ◽  
Mequannent Sharew Melaku ◽  
Melaku Yalew ◽  
Mastewal Arefaynie ◽  
Gedamnesh Bitew ◽  
...  
Keyword(s):  
Respiratory Tract ◽  
Maternal Age ◽  
Respiratory Tract Infections ◽  
Amhara Region ◽  
Government Employee ◽  
Childhood Pneumonia ◽  
The Past ◽  
Increased Risk ◽  
History Of ◽  
Tract Infections

Abstract Background Worldwide, pneumonia is the third leading cause of death in under 5 years children. Ethiopia is ranked 4th out of 15 countries having the highest burdens of the death rate among under-five children due to pneumonia. Regardless of this fact, efforts to identify determinants of pneumonia have been limited yet in Amhara region. This study was aimed to identify predictors of community-acquired childhood pneumonia among 2–59 months old children in the Amhara region, Ethiopia. Methods Facility-based case–control study was conducted in the Amhara region from June 4 to July 15, 2018, among 28 health centers distributed across the region. The total sample size used was 888 (296 cases and 592 controls) children whose age were 2–59 months. At first, multistage sampling technique was employed. Data were collected on a face-to-face interview. Epi data v. 4.6 for data entry and statistical packages for social sciences version 23 for data analysis were used. Multivariable logistic regression analyses were used to test the associations between the study variables at P-value < 0.05 with 95% CI. As a result, determinants were identified for CAP. Results Among 888 enrolled children (296 cases and 592 controls), who experienced a community-acquired pneumonia had an increased risk of maternal age of 18–24 years (AOR 0.03, at 95%CI (0.01, 0.14), Government employee (AOR 0.19, at 95% CI (0.07,0.54), lack of separate kitchen (AOR 5.37; at 95% CI (1.65, 17.43), history of diarrhea in the past two weeks (AOR 10.2; at 95% CI (5.13, 20.18), previous respiratory tract infections (AOR 8.3, at 95% CI (3.32, 20.55) and history of parental asthma (AOR 4.9, at 95% CI (2.42, 10.18). Conclusion Maternal age of 18–24 years and government employee, lack of separate kitchen, history of diarrhea in the past two weeks; previous respiratory tract infection and history of parental asthma were found statistically significant. Health personnel’s needs to focus on creating awareness to the community on the merit of the separate kitchen for reduction of Community-acquired childhood pneumonia, and focus on prevention and management of childhood diarrheal and acute respiratory tract infections.

scholarly journals 871. Symptomatic Respiratory Syncytial Virus and Adenovirus Upper Respiratory Tract Infections Increase the Risk of Invasive Aspergillosis After Allogeneic Hematopoietic Cell Transplantation

2018 ◽  
Vol 5 (suppl_1) ◽  
pp. S24-S25 ◽  
Author(s):  
Chikara Ogimi ◽  
Angela P Campbell ◽  
Hu Xie ◽  
Cynthia Fisher ◽  
Jane Kuypers ◽  
...  
Keyword(s):  
Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Respiratory Virus ◽  
Hematopoietic Cell Transplantation ◽  
Upper Respiratory Tract ◽  
Research Support ◽  
Increased Risk ◽  
Upper Respiratory ◽  
Syncytial Virus ◽  
Tract Infections

Abstract Background Invasive aspergillosis (IA) is a serious infectious complication following hematopoietic cell transplantation (HCT). Few studies have reported respiratory viral infections (RVIs) as a risk factor for developing IA, and data regarding specific viruses is sparse. We examined whether specific respiratory viruses were associated with increased risk of developing IA post-HCT. Methods In a longitudinal surveillance study of RVIs among allogeneic HCT recipients conducted 2005–2010, weekly post-HCT nasal washes were collected through day 100, then every 3 months, and whenever respiratory symptoms occurred through 1 year post-HCT. Nasal and bronchoalveolar lavage (BAL) samples were tested by multiplex PCR for respiratory syncytial virus (RSV), parainfluenza viruses (PIV)1–4, influenza A/B, human metapneumovirus, adenovirus (ADV), and human rhinoviruses, and coronaviruses. Only respiratory virus detections with symptoms were counted as RVI. Separate Cox proportional hazards models were used to examine adjusted associations between each RVI and the development of first proven/probable IA by 1-year post-HCT. Results Among 437 patients who survived &gt;28 days following HCT, 39 patients developed IA by 1-year post-HCT (median 87 days, range 5–283). After adjusting for age at HCT, neutropenia, high-grade CMV viremia, and HLA status (matched related vs. others) or severe acute graft-versus-host disease (GVHD Grade 0–2 vs. 3–4), RSV and ADV upper respiratory tract infections (URTI) were associated with increased risk of developing IA (figure). Detection of any respiratory virus in the BAL was associated with IA (P &lt; 0.001). Conclusion RSV and ADV URTI are significant risk factors for development of IA post-HCT; the association between PIV URTI and development of IA approached statistical significance. Viral lower respiratory tract infection was associated with IA. Our data provide a rationale to assess IA as an endpoint in preventive studies of novel agents for respiratory viruses and further emphasize the importance of effective infection prevention practices for RVIs after HCT. Disclosures J. Chien, Gilead Sciences, Inc.: Employee and Shareholder, Salary and stocks. A. Waghmare, Ablynx: Investigator, Research support. J. Englund, Gilead: Consultant and Investigator, Consulting fee and Research support. Novavax: Investigator, Research support. GlaxoSmithKline: Investigator, Research support. Alios: Investigator, Research support. MedImmune: Investigator, Research support. M. Boeckh, Asun Biopharma: Consultant and Investigator, Consulting fee and Research support. Gilead Sciences: Consultant and Investigator, Consulting fee and Research support. Chimerix Inc.: Consultant and Investigator, Consulting fee and Research support. Humabs: Consultant, Consulting fee. GSK: Investigator, Research support.

Increased risk of respiratory tract infections in children with Down syndrome: the consequence of an altered immune system

2010 ◽  
Vol 12 (11) ◽  
pp. 799-808 ◽  
Author(s):  
Beatrijs L.P. Bloemers ◽  
Chantal J.M. Broers ◽  
Louis Bont ◽  
Michel E. Weijerman ◽  
Reinoud J.B.J. Gemke ◽  
...  
Keyword(s):  
Down Syndrome ◽  
Immune System ◽  
Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Children With Down Syndrome ◽  
Increased Risk ◽  
Tract Infections

scholarly journals Extracellular amoebal-vesicles: potential transmission vehicles for respiratory viruses

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Rafik Dey ◽  
Melanie A. Folkins ◽  
Nicholas J. Ashbolt
Keyword(s):  
Respiratory Syncytial Virus ◽  
Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Respiratory Viruses ◽  
Environmental Persistence ◽  
Viral Dissemination ◽  
Acute Respiratory Tract Infections ◽  
High Concentrations ◽  
Syncytial Virus ◽  
Tract Infections

AbstractHuman respiratory syncytial virus (RSV) is a major cause of acute respiratory tract infections in children and immunocompromised adults worldwide. Here we report that amoebae-release respirable-sized vesicles containing high concentrations of infectious RSV that persisted for the duration of the experiment. Given the ubiquity of amoebae in moist environments, our results suggest that extracellular amoebal-vesicles could contribute to the environmental persistence of respiratory viruses, including potential resistance to disinfection processes and thereby offering novel pathways for viral dissemination and transmission.

scholarly journals Viral etiology and epidemiology of pediatric patients hospitalized for acute respiratory tract infections in Macao: a retrospective study from 2014 to 2017

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Cheng Lei ◽  
Lisong Yang ◽  
Cheong Tat Lou ◽  
Fan Yang ◽  
Kin Ian SiTou ◽  
...  
Keyword(s):  
Respiratory Tract ◽  
Lower Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Pediatric Patients ◽  
Respiratory Infections ◽  
Upper Respiratory Tract ◽  
Viral Etiology ◽  
Upper Respiratory ◽  
Syncytial Virus ◽  
Tract Infections

Abstract Background Acute respiratory infections (ARIs) are among the leading causes of hospitalization in children. Understanding the local dominant viral etiologies is important to inform infection control practices and clinical management. This study aimed to investigate the viral etiology and epidemiology of respiratory infections among pediatric inpatients in Macao. Methods A retrospective study using electronic health records between 2014 and 2017 at Kiang Wu Hospital was performed. Nasopharyngeal swab specimens were obtained from hospitalized children aged 13 years or younger with respiratory tract diseases. xMAP multiplex assays were employed to detect respiratory agents including 10 respiratory viruses. Data were analyzed to describe the frequency and seasonality. Results Of the 4880 children enrolled in the study, 3767 (77.1%) were positive for at least one of the 13 viral pathogens tested, of which 2707 (55.5%) being male and 2635 (70.0%) under 2 years old. Among the positive results, there were 3091 (82.0%) single infections and 676 (18.0%) multiple infections. The predominant viruses included human rhinovirus/enterovirus (HRV/EV 27.4%), adenovirus (ADV, 15.8%), respiratory syncytial virus B (RSVB, 7.8%) and respiratory syncytial virus A (RSVA, 7.8%). The detection of viral infection was the most prevalent in autumn (960/1176, 81.6%), followed by spring (1095/1406, 77.9%), winter (768/992, 77.4%), and summer (944/1306, 72.3%), with HRV/EV and ADV being most commonly detected throughout the 4 years of study period. The detection rate of viral infection was highest among ARI patients presented with croup (123/141, 87.2%), followed by lower respiratory tract infection (1924/2356, 81.7%) and upper respiratory tract infection (1720/2383, 72.2%). FluA, FluB and ADV were positive factors for upper respiratory tract infections. On the other hand, infection with RSVA, RSVB, PIV3, PIV4, HMPV, and EV/RHV were positively associated with lower respiratory tract infections; and PIV1, PIV2, and PIV3 were positively associated with croup. Conclusions This is the first study in Macao to determine the viral etiology and epidemiology of pediatric patients hospitalized for ARIs. The study findings can contribute to the awareness of pathogen, appropriate preventative measure, accurate diagnosis, and proper clinical management of respiratory viral infections among children in Macao.

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.

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