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https://www.readbyqxmd.com/read/28335562/virus-bacteria-interactions-an-emerging-topic-in-human-infection
#1
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
#2
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/28335547/genomic-loads-and-genotypes-of-respiratory-syncytial-virus-viral-factors-during-lower-respiratory-tract-infection-in-chilean-hospitalized-infants
#3
Yazmín Espinosa, Camila San Martín, Alejandro A Torres, Mauricio J Farfán, Juan P Torres, Vasanthi Avadhanula, Pedro A Piedra, Lorena I Tapia
The clinical impact of viral factors (types and viral loads) during respiratory syncytial virus (RSV) infection is still controversial, especially regarding newly described genotypes. In this study, infants with RSV bronchiolitis were recruited to describe the association of these viral factors with severity of infection. RSV antigenic types, genotypes, and viral loads were determined from hospitalized patients at Hospital Roberto del Río, Santiago, Chile. Cases were characterized by demographic and clinical information, including days of lower respiratory symptoms and severity...
March 21, 2017: International Journal of Molecular Sciences
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
#4
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/28333409/missed-opportunities-for-antimicrobial-stewardship-in-pre-school-children-admitted-to-hospital-with-lower-respiratory-tract-infection
#5
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/28332631/integrated-dna-and-rna-extraction-using-magnetic-beads-from-viral-pathogens-causing-acute-respiratory-infections
#6
Hui He, Rongqun Li, Yi Chen, Ping Pan, Wenjuan Tong, Xueyan Dong, Yueming Chen, Daojun Yu
Current extraction methods often extract DNA and RNA separately, and few methods are capable of co-extracting DNA and RNA from sputum. We established a nucleic acid co-extraction method from sputum based on magnetic beads and optimized the method by evaluating influencing factors, such as the guanidinium thiocyanate (GTC) and dithiothreitol (DTT) concentrations, magnetic bead amount, incubation temperature, lysis buffer pH and RNA carrier type. The feasibility of the simultaneous nucleic acid co-extraction method was evaluated by amplifying DNA and RNA viruses from a single clinical specimen with a multiplex RT-qPCR method...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28332341/risk-factors-for-acute-exacerbation-of-idiopathic-pulmonary-fibrosis-a-systematic-review-and-meta-analysis
#7
Meihua Qiu, Yuqing Chen, Qiao Ye
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a chronic andprogressive fibrotic disease limited to the lungs.The course of disease varies widely, with some patients experiencing acute respiratory deterioration, a conditioncalled acute exacerbations of IPF (AE-IPF). The risk factors contributing to AE-IPF are unclear. This systematic review and meta-analysis investigatedthe risk factors for AE-IPF. METHODS: Studies ofrisk factors for AE-IPF were identified in Medline, EMBASE and Cochrane databases...
March 23, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28331122/an-autopsy-case-report-of-adult-t-cell-leukemia-accompanied-by-rheumatoid-arthritis-mimicking-diffuse-panbronchiolitis
#8
Tomoko Shiraishi, Hiroshi Ishimoto, Kentaro Akata, Toshinori Kawanami, Kazuhiro Yatera, Hiroshi Mukae
A 50-year-old female with a history of chronic sinusitis and rheumatoid arthritis visited our department with repetitive lower respiratory tract infections of Pseudomonas aeruginosa. Her chest CT showed diffuse panbronchiolitis-like pulmonary lesions, her blood examination revealed atypical lymphocytes, and she was serologically positive for anti-human T-lymphotrophic virus type 1 (HTLV-1) antibody. Her rheumatoid arthritis had been well-controlled after biological agent treatment followed by anti-inflammatory analgesic treatment...
2017: Journal of UOEH
https://www.readbyqxmd.com/read/28331093/structural-characterization-of-hcov-nl63-n-protein
#9
Bozena Szelazek, Wojciech Kabala, Krzysztof Kus, Michal Zdzalik, Aleksandra Twarda-Clapa, Przemyslaw Golik, Michal Burmistrz, Dominik Florek, Benedykt Wladyka, Krzysztof Pyrc, Grzegorz Dubin
Coronaviruses are responsible for upper and lower respiratory tract infections in humans. It is estimated that 1-10% of the population suffers annually from cold-like symptoms related to infection with HCoV-NL63, an alphacoronavirus. The nucleocapsid (N) protein, the major structural component of the capsid, facilitates RNA packing, links the capsid to the envelope and is also involved in multiple other processes including viral replication and evasion of the immune system. Although the role of N protein in viral replication is relatively well described, no structural data are currently available regarding the N proteins of alphacoronaviruses...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28331084/structural-insights-into-emerging-pediatric-pathogens-human-bocaparvoviruses
#10
Mario Mietzsch, Shweta Kailasan, Jamie Garrison, Maria Ilyas, Paul Chipman, Kalle Kantola, Mandy E Janssen, John Spear, Duncan Sousa, Robert McKenna, Kevin Brown, Maria Söderlund-Venermo, Timothy Baker, Mavis Agbandje-McKenna
Bocaparvoviruses are emerging pathogens of the Parvoviridae family. Human bocaviruses 1 (HBoV1) causes severe respiratory infections and HBoV2-4 gastrointestinal infections in young children. Recent reports of life threatening cases, lack of direct treatment or vaccination, and a limited understanding of their disease mechanisms demand the need to study these pathogens on a molecular and structural level for the development of therapeutics. Towards this end, the capsid structures of HBoV1, HBoV3, and HBoV4 were determined to 2...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28331081/multiple-sources-of-genetic-diversity-of-influenza-a-viruses-during-the-hajj
#11
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/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
#12
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/28328944/respiratory-viruses-in-patients-with-influenza-like-illness-in-senegal-focus-on-human-respiratory-adenoviruses
#13
Mbayame Ndiaye Niang, Ndeye Sokhna Diop, Amary Fall, Davy E Kiori, Fatoumata Diene Sarr, Sara Sy, Déborah Goudiaby, Mamadou Aliou Barry, Malick Fall, Ndongo Dia
BACKGROUND: Human adenoviruses (HAdVs) are highly contagious pathogens that are associated with a wide spectrum of human illnesses involving the respiratory tract. In the present study, we investigate the epidemiologic and viral molecular features of HAdVs circulating in Senegal after 4 consecutive years of sentinel surveillance of influenza-like Illness cases. METHODOLOGY AND RESULTS: From January 2012 to December 2015 swabs were collected from consenting ILI outpatients...
2017: PloS One
https://www.readbyqxmd.com/read/28328592/status-asthmaticus-and-central-herniation-a-case-for-multidisciplinary-critical-care
#14
Joelle B Karlik, Tristan Stani, Stephanie Nonas, Aclan Dogan, Ansgar Brambrink
A 24-year-old woman with history of asthma was intubated emergently for acute status asthmaticus triggered by acute respiratory syncytial virus infection and treated with permissive hypercapnia. Her ventilation was complicated by auto-positive end-expiratory pressure and elevated peak airway, plateau, and central venous pressures. On hospital day 2, she was noted to have anisocoria. Imaging showed diffuse cerebral edema with central herniation. Difficult ventilation and hypercapnia directly contributed to her severe cerebral edema...
March 15, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28327617/the-cell-surface-mucin-muc1-limits-the-severity-of-influenza-a-virus-infection
#15
J L McAuley, L Corcilius, H-X Tan, R J Payne, M A McGuckin, L E Brown
Cell surface mucin (cs-mucin) glycoproteins are constitutively expressed at the surface of respiratory epithelia where pathogens such as influenza A virus (IAV) gain entry into cells. Different members of the cs-mucin family each express a large and heavily glycosylated extracellular domain that towers above other receptors on the epithelial cell surface, a transmembrane domain that enables shedding of the extracellular domain, and a cytoplasmic tail capable of triggering signaling cascades. We hypothesized that IAV can interact with the terminal sialic acids presented on the extracellular domain of cs-mucins, resulting in modulation of infection efficiency...
March 22, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28324595/recent-advances-in-developing-antiviral-therapies-for-respiratory-syncytial-virus
#16
REVIEW
Brian C Shook, Kai Lin
Respiratory syncytial virus (RSV) infection presents a significant health challenge in small children, the elderly and immunocompromised patients. There is still a high unmet medical need among patients with RSV infection, and no specific antiviral therapy is available. The only approved agents are palivizumab, which has to be given prophylactically, mainly in high-risk infants, and ribavirin, which is rarely used due to toxicity concerns and questionable benefits. Efforts to develop new antiviral agents have been hampered by the perceived need for high safety hurdles in pediatric patient populations use and the lack of well-characterized druggable targets...
April 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/28324594/polymers-in-the-delivery-of-sirna-for-the-treatment-of-virus-infections
#17
REVIEW
Nicholas Reynolds, Megan Dearnley, Tracey M Hinton
Viral diseases remain a major cause of death worldwide. Despite advances in vaccine and antiviral drug technology, each year over three million people die from a range of viral infections. Predominant viruses include human immunodeficiency virus, hepatitis viruses, and gastrointestinal and respiratory viruses. Now more than ever, robust, easily mobilised and cost-effective antiviral strategies are needed to combat both known and emerging disease threats. RNA interference and small interfering (si)RNAs were initially hailed as a "magic bullet", due to their ability to inhibit the synthesis of any protein via the degradation of its complementary messenger RNA sequence...
April 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/28322710/surveillance-and-testing-for-middle-east-respiratory-syndrome-coronavirus-saudi-arabia-april-2015-february-2016
#18
Abdulaziz A Bin Saeed, Glen R Abedi, Abdullah G Alzahrani, Iyad Salameh, Fatima Abdirizak, Raafat Alhakeem, Homoud Algarni, Osman A El Nil, Mutaz Mohammed, Abdullah M Assiri, Hail M Alabdely, John T Watson, Susan I Gerber
Saudi Arabia has reported >80% of the Middle East respiratory syndrome coronavirus (MERS-CoV) cases worldwide. During April 2015-February 2016, Saudi Arabia identified and tested 57,363 persons (18.4/10,000 residents) with suspected MERS-CoV infection; 384 (0.7%) tested positive. Robust, extensive, and timely surveillance is critical for limiting virus transmission.
April 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28320361/estimates-of-hospitalization-attributable-to-influenza-and-rsv-in-the-us-during-1997-2009-by-age-and-risk-status
#19
Gonçalo Matias, Robert Taylor, François Haguinet, Cynthia Schuck-Paim, Roger Lustig, Vivek Shinde
BACKGROUND: Estimates of influenza and respiratory syncytial virus (RSV) burden must be periodically updated to inform public health strategies. We estimated seasonal influenza- and RSV-attributable hospitalizations in the US from 1997 to 2009 according to age and risk status (NCT01599390). METHODS: Multiple linear regression modelling was used to attribute hospitalizations to influenza or RSV using virological surveillance and hospitalization data. Hospitalization data were obtained from the US Nationwide Inpatient Sample and virology data were obtained from FluView (Centers for Disease Control and Prevention)...
March 21, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28318782/role-of-the-microbiome-in-swine-respiratory-disease
#20
REVIEW
Megan C Niederwerder
Microbiome is a term used to describe the community of microorganisms that live on the skin and mucosal surfaces of animals. The gastrointestinal microbiome is essential for proper nutrition and immunity. How the gastrointestinal microbiome impacts primary respiratory or systemic infections is an emerging area of study. Porcine reproductive and respiratory syndrome (PRRS) is caused by a systemic virus infection with primary lung pathology and continues to be the most costly disease of swine worldwide. Recent studies have demonstrated that improved outcome after experimental infection with PRRS virus and porcine circovirus type 2 (PCV2) is associated with increased fecal microbiome diversity and the presence of non-pathogenic Escherichia coli...
March 2, 2017: Veterinary Microbiology
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