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https://www.readbyqxmd.com/read/28340310/viruses-in-cystic-fibrosis-patients-airways
#1
Lisa Billard, Rozenn Le Berre, Léa Pilorgé, Christopher Payan, Geneviève Héry-Arnaud, Sophie Vallet
Although bacteria have historically been considered to play a major role in cystic fibrosis (CF) airway damage, a strong impact of respiratory viral infections (RVI) is also now recognized. Emerging evidence confirms that respiratory viruses are associated with deterioration of pulmonary function and exacerbation and facilitation of bacterial colonization in CF patients. The aim of this review is to provide an overview of the current knowledge on respiratory viruses in CF airways, to discuss the resulting inflammation and RVI response, to determine how to detect the viruses, and to assess their clinical consequences, prevalence, and interactions with bacteria...
March 24, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28335562/virus-bacteria-interactions-an-emerging-topic-in-human-infection
#2
REVIEW
Erin A Almand, Matthew D Moore, Lee-Ann Jaykus
Bacteria and viruses often occupy the same niches, however, interest in their potential collaboration in promoting wellness or disease states has only recently gained traction. While the interaction of some bacteria and viruses is well characterized (e.g., influenza virus), researchers are typically more interested in the location of the infection than the manner of cooperation. There are two overarching types of bacterial-virus disease causing interactions: direct interactions that in some way aid the viruses, and indirect interactions aiding bacteria...
March 21, 2017: Viruses
https://www.readbyqxmd.com/read/28335552/virological-surveillance-of-influenza-a-subtypes-isolated-in-2014-from-clinical-outbreaks-in-canadian-swine
#3
Helena Grgić, Jackie Gallant, Zvonimir Poljak
Influenza A viruses (IAVs) are respiratory pathogens associated with an acute respiratory disease that occurs year-round in swine production. It is currently one of the most important pathogens in swine populations, with the potential to infect other host species including humans. Ongoing research indicates that the three major subtypes of IAV-H1N1, H1N2, and H3N2-continue to expand in their genetic and antigenic diversity. In this study, we conducted a comprehensive genomic analysis of 16 IAVs isolated from different clinical outbreaks in Alberta, Manitoba, Ontario, and Saskatchewan in 2014...
March 21, 2017: Viruses
https://www.readbyqxmd.com/read/28335511/1st-workshop-of-the-canadian-society-for-virology
#4
Craig McCormick, Nathalie Grandvaux
The 1st Workshop of the Canadian Society for Virology (CSV2016) was a Special Workshop of the 35th Annual Meeting for the American Society for Virology, held on 18 June 2016 on the beautiful Virginia Tech campus in Blacksburg, Virginia. The workshop provided a forum for discussion of recent advances in the field, in an informal setting conducive to interaction with colleagues. CSV2016 featured two internationally-renowned Canadian keynote speakers who discussed translational virology research; American Society for Virology President Grant McFadden (then from University of Florida, now relocated to Arizona State University) who presented his studies of oncolytic poxviruses, while Matthew Miller (McMaster University) reviewed the prospects for a universal influenza vaccine...
March 20, 2017: Viruses
https://www.readbyqxmd.com/read/28335395/essential-oil-composition-and-bioactivities-of-waldheimia-glabra-asteraceae-from-qinghai-tibet-plateau
#5
Ji De, Yan Lu, Lijun Ling, Nan Peng, Yang Zhong
Waldheimia glabra is traditionally used as incense and as an anti-influenza drug by Tibetans in China. Here, we collected W. glabra from the Gangs Rinpoche mountain at an altitude of 5200 m, and analyzed its essential oil by gas chromatography-mass spectrometry (GC-MS) combined with the retention indices (RI). Twenty-seven compounds, representing 72.4% of the total essential oil, were identified, including α-bisabolol (20.2%), valeranone (11.8%), chamazulene (9.9%), spathulenol (8.2%), β-caryophyllene (6...
March 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28334924/throat-swabs-in-children-with-respiratory-tract-infection-associations-with-clinical-presentation-and-potential-targets-for-point-of-care-testing
#6
Hannah V Thornton, Alastair D Hay, Niamh M Redmond, Sophie L Turnbull, Hannah Christensen, Tim J Peters, John P Leeming, Andrew Lovering, Barry Vipond, Peter Muir, Peter S Blair
Background and objectives.: Diagnostic uncertainty over respiratory tract infections (RTIs) in primary care contributes to over-prescribing of antibiotics and drives antibiotic resistance. If symptoms and signs predict respiratory tract microbiology, they could help clinicians target antibiotics to bacterial infection. This study aimed to determine relationships between symptoms and signs in children presenting to primary care and microbes from throat swabs. Methods.: Cross-sectional study of children ≥3 months to <16 years presenting with acute cough and RTI, with subset follow-up...
February 18, 2017: Family Practice
https://www.readbyqxmd.com/read/28333986/building-the-road-to-a-regional-zoonoses-strategy-a-survey-of-zoonoses-programmes-in-the-americas
#7
Melody J Maxwell, Mary H Freire de Carvalho, Armando E Hoet, Marco A N Vigilato, Julio C Pompei, Ottorino Cosivi, Victor J Del Rio Vilas
BACKGROUND: In recent years, global public health security has been threatened by zoonotic disease emergence as exemplified by outbreaks of H5N1 and H1N1 influenza, SARS, and most recently Ebola and Zika. Additionally, endemic zoonoses, such as rabies, burden countries year after year, placing demands on limited finances and personnel. To survey the baseline status of the emerging and endemic zoonoses programmes of the Latin American and the Caribbean (LAC) countries, the Pan American Health Organization (PAHO) conducted a survey of priority emerging and endemic zoonoses, countries´ prioritization criteria and methodologies, and suggestions to strengthen countries capacities and regional approaches to zoonoses control...
2017: PloS One
https://www.readbyqxmd.com/read/28333409/missed-opportunities-for-antimicrobial-stewardship-in-pre-school-children-admitted-to-hospital-with-lower-respiratory-tract-infection
#8
Tony Walls, Erika Stark, Philip Pattemore, Lance Jennings
AIM: To describe the usage of multiplex polymerase chain reaction on nasopharyngeal swab (NPS) samples in pre-school children presenting with lower respiratory tract infection (LRTI) at Christchurch Hospital, and its impact on the use of antibiotics empirically and at discharge. METHODS: This retrospective cohort study included 237 children, ages 3 months to 5 years, admitted to hospital during the winter months of 2012-2015 with a diagnosis of community-acquired LRTI...
March 23, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28332900/fc-or-not-fc-that-is-the-question-antibody-fc-receptor-interactions-are-key-to-universal-influenza-vaccine-design
#9
Sinthujan Jegaskanda, Hillary A Vanderven, Adam K Wheatley, Stephen J Kent
A universal vaccine that provides long-lasting protection from both epidemic and pandemic influenza viruses remains the "holy grail" of influenza vaccine research. Though virus neutralization assays are the current benchmark of measuring vaccine effectiveness, it is clear that Fc-receptor functions can drastically improve the effectiveness of antibodies and vaccines in vivo. Antibodies that kill virus-infected cells and/or elicit an antiviral environment, termed antibody-dependent cellular cytotoxicity (ADCC)-mediating antibodies, provide a link between the innate and adaptive immune response...
March 23, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28332646/the-role-of-animal-reservoirs-in-social-environmental-landscapes-remarks-on-the-control-of-avian-influenza-and-preparedness-for-pandemics
#10
M P Ortiz-Rodríguez, G C Ramírez-Nieto, L C Villamil-Jiménez
Influenza viruses are well known for their ability to infect and cause disease in a broad range of hosts. Modern advances in reverse genetics have enabled scientists to probe the mutations that allow influenza viruses to perform host switching. Despite this detailed understanding of the molecular modifications that allow host switching and adaptation, there is a gap in knowledge regarding the factors external to the virus and their interactions that act as triggers leading to a pandemic. Studies on the ecology of zoonotic pathogens should be the new paradigm for understanding not only influenza viruses but any other infectious disease that can be a threat to animal and human health...
December 2016: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28332645/epidemiological-role-of-birds-in-the-transmission-and-maintenance-of-zoonoses
#11
A Contreras, A Gómez-Martín, A Paterna, J Tatay-Dualde, M Prats-Van Der Ham, J C Corrales, C De La Fe, A Sánchez
The risk of zoonoses spreading from birds to humans is lower, quantitatively speaking, than the risk of transmission between other host groups, because the two taxonomic groups share fewer pathogens. Nevertheless, birds have a number of epidemiological characteristics that make them extremely important hosts in the transmission and maintenance of zoonoses, including their susceptibility to pathogens that are extremely hazardous to humans (such as highly pathogenic avian influenza virus, West Nile virus and Chlamydia psittaci) and their ability to travel long distances, especially in the case of migratory birds...
December 2016: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28332599/erratum-characterization-of-the-pathogenesis-of-h10n3-h10n7-and-h10n8-subtype-avian-influenza-viruses-circulating-in-ducks
#12
Miaomiao Zhang, Xingxing Zhang, Kaidi Xu, Qiaoyang Teng, Qinfang Liu, Xuesong Li, Jianmei Yang, Jianqing Xu, Hongjun Chen, Xiaoyan Zhang, Zejun Li
No abstract text is available yet for this article.
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28331993/molecular-characterization-and-phylogenetic-analysis-of-human-influenza-a-viruses-isolated-in-iran-during-the-2014-2015-season
#13
Elham Moasser, Farida Behzadian, Afagh Moattari, Fatemeh Fotouhi, Amir Rahimi, Hassan Zaraket, Seyed Younes Hosseini
Influenza A viruses are an important cause of severe infectious diseases in humans and are characterized by their fast evolution rate. Global monitoring of these viruses is critical to detect newly emerging variants during annual epidemics. Here, we sought to genetically characterize influenza A/H1N1pdm09 and A/H3N2 viruses collected in Iran during the 2014-2015 influenza season. A total of 200 nasopharyngeal swabs were collected from patients with influenza-like illnesses. Swabs were screened for influenza A and B using real-time PCR...
March 22, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28331286/neutralizing-activities-against-seasonal-influenza-viruses-in-human-intravenous-immunoglobulin
#14
Hiroyuki Onodera, Takeru Urayama, Kazue Hirota, Kazuhiro Maeda, Ritsuko Kubota-Koketsu, Kazuo Takahashi, Katsuro Hagiwara, Yoshinobu Okuno, Kazuyoshi Ikuta, Mikihiro Yunoki
Influenza viruses A/H1N1, A/H3N2, and B are known seasonal viruses that undergo annual mutation. Intravenous immunoglobulin (IVIG) contains anti-seasonal influenza virus globulins. Although the virus-neutralizing (VN) titer is an indicator of protective antibodies, changes in this titer over extended time periods have yet to be examined. In this study, variations in hemagglutination inhibition (HI) and VN titers against seasonal influenza viruses in IVIG lots over extended time periods were examined. In addition, the importance of monitoring the reactivity of IVIG against seasonal influenza viruses with varying antigenicity was evaluated...
2017: Biologics: Targets & Therapy
https://www.readbyqxmd.com/read/28331095/divergent-requirement-of-fc-fc%C3%AE-r-interactions-for-in-vivo-protection-against-influenza-viruses-by-two-pan-h5-hemagglutinin-antibodies
#15
Shuangshuang Wang, Huanhuan Ren, Wenbo Jiang, Honglin Chen, Hongxing Hu, Zhiwei Chen, Paul Zhou
Recent studies have shown that Fc-FcγR interactions are required for in vivo protection against influenza viruses by broadly reactive anti-HA stem, but not virus strain-specific, anti-receptor binding site (RBS), antibodies (Abs). Since only a few Abs recognizing epitopes in the head region but outside the RBS have been tested against single challenge virus strains, it remains unknown whether Fc-FcγR interactions are required for in vivo protection by Abs recognizing epitopes outside the RBS, and whether the requirement is virus strain-specific or epitope-specific...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28331085/heterologous-packaging-signals-on-ha-but-not-na-or-ns-limit-influenza-a-virus-reassortment
#16
Maria C White, John Steel, Anice C Lowen
Influenza A virus (IAV) RNA packaging signals serve to direct the incorporation of IAV gene segments into virus particles, and this process is thought to be mediated by segment-segment interactions. These packaging signals are segment- and strain-specific, and as such, they have the potential to impact reassortment outcomes between different IAV strains. Our study aimed to quantify the impact of packaging signal mismatch on IAV reassortment using the human seasonal influenza A/Panama/2007/99 (H3N2) and pandemic influenza A/Netherlands/602/2009 (H1N1) viruses...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28331081/multiple-sources-of-genetic-diversity-of-influenza-a-viruses-during-the-hajj
#17
Joanna C A Cobbin, Mohammad Alfelali, Osamah Barasheed, Janette Taylor, Dominic E Dwyer, Jen Kok, Robert Booy, Edward C Holmes, Harunor Rashid
Outbreaks of respiratory virus infection at mass gatherings pose significant health risks to attendants, host communities and ultimately the global population if they help facilitate viral emergence. However, little is known about the genetic diversity, evolution and patterns of viral transmission during mass gatherings, particularly how much diversity is generated by in situ transmission compared to that imported from other locations. Here we describe the genomic-scale evolution of influenza A viruses sampled from the Hajj at Makkah during 2013-2015...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28331080/evaluation-of-the-immune-responses-to-and-cross-protective-efficacy-of-eurasian-h7-avian-influenza-viruses
#18
Hyeok-Il Kwon, Young-Il Kim, Su-Jin Park, Min-Suk Song, Eun-Ha Kim, Se Mi Kim, Young-Jae Si, In-Won Lee, Byung-Min Song, Youn-Jeong Lee, Seok Joong Yun, Wun-Jae Kim, Young Ki Choi
Due to increasing concerns of human infection by various H7 viruses, including recent H7N9 viruses, we evaluated the genetic relationships and the cross-protective efficacies of three different Eurasian H7 avian influenza viruses. Phylogenic and molecular analysis revealed that recent Eurasian H7 viruses can be separated into two different lineages with relatively high amino acid identity within groups (94.8 to 98.8%), and low amino acid identity (90.3 to 92.6 %) between the groups. In vivo immunization with representatives of each group revealed that while group-specific cross-reactivity was induced, cross-reactive HI titers were approximately fourfold lower against heterologous group viruses compared to homologous group viruses...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28330443/influenza-and-respiratory-syncytial-virus-in-infants-study-iris-of-hospitalized-and-non-ill-infants-aged-1-year-in-four-countries-study-design-and-methods
#19
Mark G Thompson, Danielle R Hunt, Ali K Arbaji, Artan Simaku, Veronica L Tallo, Holly M Biggs, Carolyn Kulb, Aubree Gordon, Ilham Abu Khader, Silvia Bino, Marilla G Lucero, Eduardo Azziz-Baumgartner, Pat Shifflett, Felix Sanchez, Basima I Marar, Ilirjana Bakalli, Eric A F Simões, Min Z Levine, Jennifer K Meece, Angel Balmaseda, Tareq M Al-Sanouri, Majlinda Dhimolea, Joanne N de Jesus, Natalie J Thornburg, Susan I Gerber, Lionel Gresh
BACKGROUND: This multi-country prospective study of infants aged <1 year aims to assess the frequency of influenza virus and respiratory syncytial virus (RSV) infections associated with hospitalizations, to describe clinical features and antibody response to infection, and to examine predictors of very severe disease requiring intensive care. METHODS/DESIGN: We are enrolling a hospital-based cohort and a sample of non-ill infants in four countries (Albania, Jordan, Nicaragua, and the Philippines) using a common protocol...
March 22, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28329354/clinical-significance-of-human-coronavirus-in-bronchoalveolar-lavage-samples-from-hematopoietic-cell-transplantation-recipients-and-patients-with-hematologic-malignancies
#20
Chikara Ogimi, Alpana A Waghmare, Jane M Kuypers, Hu Xie, Cecilia C Yeung, Wendy M Leisenring, Sachiko Seo, Su-Mi Choi, Keith R Jerome, Janet A Englund, Michael Boeckh
Background: The possible role of human coronaviruses (HCoV) in lower respiratory tract disease (LRTD) in hematopoietic cell transplant (HCT) recipients and patients with hematologic malignancies (HM) has not been well studied. Methods: We conducted a retrospective review of HCT/HM patients with HCoV detected in bronchoalveolar lavage (BAL). HCoV strains were identified in BAL samples using strain-specific PCR. Mortality rates were compared among HCT recipients with LRTD caused by HCoV, respiratory syncytial virus (RSV), influenza or parainfluenza virus (PIV) by multivariable Cox regression analysis...
February 17, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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