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Respiratory syncytial virus

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https://www.readbyqxmd.com/read/28726613/human-metapneumovirus-and-other-respiratory-viral-infections-during-pregnancy-and-birth-nepal
#1
Jennifer L Lenahan, Janet A Englund, Joanne Katz, Jane Kuypers, Anna Wald, Amalia Magaret, James M Tielsch, Subarna K Khatry, Stephen C LeClerq, Laxman Shrestha, Mark C Steinhoff, Helen Y Chu
Human metapneumovirus (HMPV) is a respiratory virus that can cause severe lower respiratory tract disease and even death, primarily in young children. The incidence and characteristics of HMPV have not been well described in pregnant women. As part of a trial of maternal influenza immunization in rural southern Nepal, we conducted prospective, longitudinal, home-based active surveillance for febrile respiratory illness during pregnancy through 6 months postpartum. During 2011-2014, HMPV was detected in 55 of 3,693 women (16...
August 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28723886/prolonged-viral-replication-and-longitudinal-viral-dynamic-differences-among-respiratory-syncytial-virus-rsv-infected-infants
#2
Monica E Brint, Joshua M Hughes, Aditya Shah, Chelsea R Miller, Lisa G Harrison, Elizabeth A Meals, Jacqueline Blanch, Charlotte R Thompson, Stephania A Cormier, John P DeVincenzo
BACKGROUND: Longitudinal RSV dynamics have not been well-studied despite existence of factors favoring prolonged RSV replication including: high mutation rates allowing rapid evolution and potential escape from immune control. We therefore measured viral load in previously RSV-naïve infants over prolonged time-spans. METHODS: During 2014-2015, quantitative nasal aspirates were collected from 51 RSV-PCR+ infants. Multiple parallel assessments of viral loads were quantified at each collected time point using a well-validated real-time qRT-PCR assay...
July 19, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28722020/a-critical-role-of-gas6-axl-signal-in-allergic-airway-responses-during-rsv-vaccine-enhanced-disease
#3
Takehiko Shibata, Manabu Ato
Respiratory syncytial virus (RSV) is a common virus that causes lower respiratory infections across a wide range of ages. A licensed RSV vaccine is not available because vaccination with formalin-inactivated RSV (FI-RSV) and the subsequent RSV infection cause not only insufficient induction of neutralizing antibodies but also severe allergic airway responses, termed FI-RSV vaccine enhanced disease (FI-RSV VED). However, the underlying mechanism has not been identified, although a Th2-biased immune response is known to be a hallmark of this disease...
July 19, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28719323/burden-and-seasonality-of-viral-acute-respiratory-tract-infections-among-outpatients-in-southern-sri-lanka
#4
David Shapiro, Champica K Bodinayake, Ajith Nagahawatte, Vasantha Devasiri, Ruvini Kurukulasooriya, Jeremy Hsiang, Bradley Nicholson, Aruna Dharshan De Silva, Truls Østbye, Megan E Reller, Christopher W Woods, L Gayani Tillekeratne
In tropical and subtropical settings, the epidemiology of viral acute respiratory tract infections varies widely between countries. We determined the etiology, seasonality, and clinical presentation of viral acute respiratory tract infections among outpatients in southern Sri Lanka. From March 2013 to January 2015, we enrolled outpatients presenting with influenza-like illness (ILI). Nasal/nasopharyngeal samples were tested in duplicate using antigen-based rapid influenza testing and multiplex polymerase chain reaction (PCR) for respiratory viruses...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719310/severity-of-pneumonia-in-under-5-year-old-children-from-developing-countries-a-multicenter-prospective-observational-study
#5
Thomas Bénet, Valentina Sanchez Picot, Shally Awasthi, Nitin Pandey, Ashish Bavdekar, Anand Kawade, Annick Robinson, Mala Rakoto-Andrianarivelo, Maryam Sylla, Souleymane Diallo, Graciela Russomando, Wilma Basualdo, Florence Komurian-Pradel, Hubert Endtz, Philippe Vanhems, Gláucia Paranhos-Baccalà, For The Gabriel Network
Pneumonia is the leading cause of death in children. The objectives were to evaluate the microbiological agents linked with hypoxemia in hospitalized children with pneumonia from developing countries, to identify predictors of hypoxemia, and to characterize factors associated with in-hospital mortality. A multicenter, observational study was conducted in five hospitals, from India (Lucknow, Vadu), Madagascar (Antananarivo), Mali (Bamako), and Paraguay (San Lorenzo). Children aged 2-60 months with radiologically confirmed pneumonia were enrolled prospectively...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28716935/severe-viral-respiratory-infections-in-children-with-ifih1-loss-of-function-mutations
#6
Samira Asgari, Luregn J Schlapbach, Stéphanie Anchisi, Christian Hammer, Istvan Bartha, Thomas Junier, Geneviève Mottet-Osman, Klara M Posfay-Barbe, David Longchamp, Martin Stocker, Samuel Cordey, Laurent Kaiser, Thomas Riedel, Tony Kenna, Deborah Long, Andreas Schibler, Amalio Telenti, Caroline Tapparel, Paul J McLaren, Dominique Garcin, Jacques Fellay
Viral respiratory infections are usually mild and self-limiting; still they exceptionally result in life-threatening infections in previously healthy children. To investigate a potential genetic cause, we recruited 120 previously healthy children requiring support in intensive care because of a severe illness caused by a respiratory virus. Using exome and transcriptome sequencing, we identified and characterized three rare loss-of-function variants in IFIH1, which encodes an RIG-I-like receptor involved in the sensing of viral RNA...
July 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28714847/modulation-of-the-transcription-factor-nf-%C3%AE%C2%BAb-in-antigen-presenting-cells-by-bovine-respiratory-syncytial-virus-small-hydrophobic-protein
#7
Nicola Pollock, Geraldine Taylor, Fatoumatta Jobe, Efrain Guzman
Bovine respiratory syncytial virus (BRSV) is an important cause of respiratory disease in young cattle and is closely related to human RSV (HRSV), which causes severe respiratory disease in infants and the elderly. The RSV genome encodes a small hydrophobic (SH) protein with viroporin activity. Previous studies have shown that recombinant BRSV lacking the SH gene (rBRSVΔSH) is attenuated in the lungs, but not in the upper respiratory tract, of calves and mucosal vaccination with rBRSVΔSH induced long-lasting protective immunity...
July 17, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28710393/emergence-of-on1-genotype-of-human-respiratory-syncytial-virus-subgroup-a-in-china-between-2011-and-2015
#8
Jinhua Song, Yan Zhang, Huiling Wang, Jing Shi, Liwei Sun, Xiaojie Zhang, Zifeng Yang, Wenda Guan, Hong Zhang, Pengbo Yu, Zhengde Xie, Aili Cui, Teresa I Ng, Wenbo Xu
A molecular epidemiological study of human respiratory syncytial virus (HRSV) was conducted to examine the distribution of its subgroups and genotypes, as well as to identify its transmission pattern in China. A total of 705 samples collected from 9 provinces in China between January 2008 and February 2015 were identified as HRSV-positive and were subsequently sequenced. Of these, 336 samples were HRSV subgroup A (HRSVA), 368 samples were HRSV subgroup B (HRSVB), and 1 sample contained both HRSVA and HRSVB...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28709160/effectiveness-of-palivizumab-in-high-risk-infants-and-children-a-propensity-score-weighted-regression-analysis
#9
Evan J Anderson, Phyllis Carosone-Link, Ram Yogev, Jumi Yi, Eric A F Simões
BACKGROUND: Infants with premature birth ≤35 weeks gestational age, chronic lung disease of prematurity and congenital heart disease are at an increased risk for lower respiratory tract infections and hospitalization from respiratory syncytial virus (RSV), which has been shown in randomized trials to be prevented by palivizumab. However, palivizumab effectiveness (PE) has not been studied in a large clinical setting. METHODS: A multicenter study among high-risk US and Canadian children younger than 24 months hospitalized with lower respiratory tract infection and whose nasopharyngeal aspirates were tested for human metapneumovirus (HMPV) and RSV were the subjects of the trial...
August 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28708049/identification-of-two-novel-functional-trna-derived-fragments-induced-in-response-to-respiratory-syncytial-virus-infection
#10
Jiehua Zhou, Shenxuan Liu, Yu Chen, Yu Fu, Alexander J Silver, Mark S Hill, Inhan Lee, Yong Sun Lee, Xiaoyong Bao
Respiratory syncytial virus (RSV) is the leading cause of lower respiratory tract infection (LRTI) in children from infancy up to early childhood. Recently, we demonstrated that RSV infection alters cellular small non-coding RNA (sncRNA) expression, most notably the tRNA-derived RNA fragments (tRFs). However, the functions of the tRFs in virus-host interaction are largely unknown. Herein, we examined the role of three RSV-induced tRFs derived from the 5-end of mature tRNAs decoding GlyCCC, LysCTT and CysGCA (named tRF5-GlyCCC, tRF5-LysCTT and tRF5-CysGCA, respectively) in controlling RSV replication...
July 15, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28704440/viral-etiology-seasonality-and-severity-of-hospitalized-patients-with-severe-acute-respiratory-infections-in-the-eastern-mediterranean-region-2007-2014
#11
Katherine C Horton, Erica L Dueger, Amr Kandeel, Mohamed Abdallat, Amani El-Kholy, Salah Al-Awaidy, Abdul Hakim Kohlani, Hanaa Amer, Abel Latif El-Khal, Mayar Said, Brent House, Guillermo Pimentel, Maha Talaat
INTRODUCTION: Little is known about the role of viral respiratory pathogens in the etiology, seasonality or severity of severe acute respiratory infections (SARI) in the Eastern Mediterranean Region. METHODS: Sentinel surveillance for SARI was conducted from December 2007 through February 2014 at 20 hospitals in Egypt, Jordan, Oman, Qatar and Yemen. Nasopharyngeal and oropharyngeal swabs were collected from hospitalized patients meeting SARI case definitions and were analyzed for infection with influenza, respiratory syncytial virus (RSV), adenovirus (AdV), human metapneumovirus (hMPV) and human parainfluenza virus types 1-3 (hPIV1-3)...
2017: PloS One
https://www.readbyqxmd.com/read/28702175/costs-of-hospitalization-with-respiratory-syncytial-virus-illness-among-children-aged-5-years-and-the-financial-impact-on-households-in-bangladesh-2010
#12
Mejbah Uddin Bhuiyan, Stephen P Luby, Nadia Ishrat Alamgir, Nusrat Homaira, Katharine Sturm-Ramirez, Emily S Gurley, Jaynal Abedin, Rashid Uz Zaman, Asm Alamgir, Mahmudur Rahman, Ismael R Ortega-Sanchez, Eduardo Azziz-Baumgartner
BACKGROUND: Respiratory syncytial virus (RSV) is the leading cause of acute respiratory illness in young children and results in significant economic burden. There is no vaccine to prevent RSV illness but a number of vaccines are in development. We conducted this study to estimate the costs of severe RSV illness requiring hospitalization among children <5 years and associated financial impact on households in Bangladesh. Data of this study could be useful for RSV vaccine development and also the value of various preventive strategies, including use of an RSV vaccine in children if one becomes available...
June 2017: Journal of Global Health
https://www.readbyqxmd.com/read/28702128/a-novel-host-factor-for-human-respiratory-syncytial-virus
#13
COMMENT
Masfique Mehedi, Peter L Collins, Ursula J Buchholz
Human respiratory syncytial virus (RSV) is the leading viral cause of severe lower respiratory disease in young children worldwide. As part of a genome-wide siRNA screen, we recently discovered that actin-related protein 2 (ARP2) is a host factor in the RSV replication cycle. ARP2 is a major constituent of the ARP2/3 complex, which catalyzes actin polymerization involved in cell morphology and motility. In the course of investigating this finding, we also found that RSV infection of human lung epithelial A459 cells induced filopodia formation and stimulated cell motility...
2017: Communicative & Integrative Biology
https://www.readbyqxmd.com/read/28701524/nanoparticles-increase-human-bronchial-epithelial-cell-susceptibility-to-respiratory-syncytial-virus-infection-via-nerve-growth-factor-induced-autophagy
#14
Sreeparna Chakraborty, Vincent Castranova, Miriam K Perez, Giovanni Piedimonte
Cytotoxic and neuroinflammatory effects of TiO2 nanoparticles (TiO2-NP) in human airways are mediated by nerve growth factor (NGF), which is also implicated in the pathophysiology of respiratory syncytial virus (RSV) infection. We tested the hypothesis that exposure to TiO2-NP results in increased susceptibility to RSV infection and exacerbation of airway inflammation via NGF-mediated induction of autophagy in lower respiratory tract cells. Human primary bronchial epithelial cells were exposed to TiO2-NP for 24 h prior to infection with recombinant red RSV (rrRSV)...
July 2017: Physiological Reports
https://www.readbyqxmd.com/read/28695368/an-interaction-of-lps-and-rsv-infection-in-augmenting-the-ahr-and-airway-inflammation-in-mice
#15
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/28690868/mirna-200c-3p-is-crucial-in-acute-respiratory-distress-syndrome
#16
Qiang Liu, Jianchao Du, Xuezhong Yu, Jun Xu, Fengming Huang, Xiaoyun Li, Cong Zhang, Xiao Li, Jiahui Chang, Daozhen Shang, Yan Zhao, Mingyao Tian, Huijun Lu, Jiantao Xu, Chang Li, Huadong Zhu, Ningyi Jin, Chengyu Jiang
Influenza infection and pneumonia are known to cause much of their mortality by inducing acute respiratory distress syndrome (ARDS), which is the most severe form of acute lung injury (ALI). Angiotensin-converting enzyme 2 (ACE2), which is a negative regulator of angiotensin II in the renin-angiotensin system, has been reported to have a crucial role in ALI. Downregulation of ACE2 is always associated with the ALI or ARDS induced by avian influenza virus, severe acute respiratory syndrome-coronavirus, respiratory syncytial virus and sepsis...
2017: Cell Discovery
https://www.readbyqxmd.com/read/28689665/determining-the-burden-of-respiratory-syncytial-virus-disease-the-known-and-the-unknown
#17
Ruth A Karron, Robert E Black
No abstract text is available yet for this article.
July 6, 2017: Lancet
https://www.readbyqxmd.com/read/28689664/global-regional-and-national-disease-burden-estimates-of-acute-lower-respiratory-infections-due-to-respiratory-syncytial-virus-in-young-children-in-2015-a-systematic-review-and-modelling-study
#18
Ting Shi, David A McAllister, Katherine L O'Brien, Eric A F Simoes, Shabir A Madhi, Bradford D Gessner, Fernando P Polack, Evelyn Balsells, Sozinho Acacio, Claudia Aguayo, Issifou Alassani, Asad Ali, Martin Antonio, Shally Awasthi, Juliet O Awori, Eduardo Azziz-Baumgartner, Henry C Baggett, Vicky L Baillie, Angel Balmaseda, Alfredo Barahona, Sudha Basnet, Quique Bassat, Wilma Basualdo, Godfrey Bigogo, Louis Bont, Robert F Breiman, W Abdullah Brooks, Shobha Broor, Nigel Bruce, Dana Bruden, Philippe Buchy, Stuart Campbell, Phyllis Carosone-Link, Mandeep Chadha, James Chipeta, Monidarin Chou, Wilfrido Clara, Cheryl Cohen, Elizabeth de Cuellar, Duc-Anh Dang, Budragchaagiin Dash-Yandag, Maria Deloria-Knoll, Mukesh Dherani, Tekchheng Eap, Bernard E Ebruke, Marcela Echavarria, Carla Cecília de Freitas Lázaro Emediato, Rodrigo A Fasce, Daniel R Feikin, Luzhao Feng, Angela Gentile, Aubree Gordon, Doli Goswami, Sophie Goyet, Michelle Groome, Natasha Halasa, Siddhivinayak Hirve, Nusrat Homaira, Stephen R C Howie, Jorge Jara, Imane Jroundi, Cissy B Kartasasmita, Najwa Khuri-Bulos, Karen L Kotloff, Anand Krishnan, Romina Libster, Olga Lopez, Marilla G Lucero, Florencia Lucion, Socorro P Lupisan, Debora N Marcone, John P McCracken, Mario Mejia, Jennifer C Moisi, Joel M Montgomery, David P Moore, Cinta Moraleda, Jocelyn Moyes, Patrick Munywoki, Kuswandewi Mutyara, Mark P Nicol, D James Nokes, Pagbajabyn Nymadawa, Maria Tereza da Costa Oliveira, Histoshi Oshitani, Nitin Pandey, Gláucia Paranhos-Baccalà, Lia N Phillips, Valentina Sanchez Picot, Mustafizur Rahman, Mala Rakoto-Andrianarivelo, Zeba A Rasmussen, Barbara A Rath, Annick Robinson, Candice Romero, Graciela Russomando, Vahid Salimi, Pongpun Sawatwong, Nienke Scheltema, Brunhilde Schweiger, J Anthony G Scott, Phil Seidenberg, Kunling Shen, Rosalyn Singleton, Viviana Sotomayor, Tor A Strand, Agustinus Sutanto, Mariam Sylla, Milagritos D Tapia, Somsak Thamthitiwat, Elizabeth D Thomas, Rafal Tokarz, Claudia Turner, Marietjie Venter, Sunthareeya Waicharoen, Jianwei Wang, Wanitda Watthanaworawit, Lay-Myint Yoshida, Hongjie Yu, Heather J Zar, Harry Campbell, Harish Nair
BACKGROUND: We have previously estimated that respiratory syncytial virus (RSV) was associated with 22% of all episodes of (severe) acute lower respiratory infection (ALRI) resulting in 55 000 to 199 000 deaths in children younger than 5 years in 2005. In the past 5 years, major research activity on RSV has yielded substantial new data from developing countries. With a considerably expanded dataset from a large international collaboration, we aimed to estimate the global incidence, hospital admission rate, and mortality from RSV-ALRI episodes in young children in 2015...
July 6, 2017: Lancet
https://www.readbyqxmd.com/read/28687749/inhibition-of-highly-pathogenic-avian-influenza-hpai-virus-by-a-peptide-derived-from-vflip-through-its-direct-destabilization-of-viruses
#19
Ho-Jin Moon, Chamilani Nikapitiya, Hyun-Cheol Lee, Min-Eun Park, Jae-Hoon Kim, Tae-Hwan Kim, Ji-Eun Yoon, Won-Kyung Cho, Jin Yeul Ma, Chul-Joong Kim, Jae U Jung, Jong-Soo Lee
The antiviral activities of synthesized Kα2-helix peptide, which was derived from the viral FLICE-like inhibitor protein (vFLIP) of Kaposi's sarcoma-associated herpesvirus (KSHV), against influenza A virus (IAV) were investigated in vitro and in vivo, and mechanisms of action were suggested. In addition to the robust autophagy activity of the Kα2-helix peptide, the present study showed that treatment with the Kα2 peptide fused with the TAT peptide significantly inhibited IAV replication and transmission...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28687214/severe-respiratory-viral-infections-new-evidence-and-changing-paradigms
#20
REVIEW
James M Walter, Richard G Wunderink
Lower respiratory tract infection is a leading cause of death in the United States. Advances in diagnostic testing have improved our ability to detect pathogens. Viral pathogens are important causal pathogens in immunocompetent patients. As the number of elderly adults and those with chronic medical conditions increases, the burden of viral respiratory infections will increase. Clinicians must be familiar with the characteristics of rhinovirus, human adenoviruses, respiratory syncytial virus, and human metapneumovirus...
July 5, 2017: Infectious Disease Clinics of North America
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