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https://www.readbyqxmd.com/read/29677479/rig-i-and-other-rna-sensors-in-antiviral-immunity
#1
Kwan T Chow, Michael Gale, Yueh-Ming Loo
Pattern recognition receptors (PRRs) survey intra- and extracellular spaces for pathogen-associated molecular patterns (PAMPs) within microbial products of infection. Recognition and binding to cognate PAMP ligand by specific PRRs initiates signaling cascades that culminate in a coordinated intracellular innate immune response designed to control infection. In particular, our immune system has evolved specialized PRRs to discriminate viral nucleic acid from host. These are critical sensors of viral RNA to trigger innate immunity in the vertebrate host...
April 26, 2018: Annual Review of Immunology
https://www.readbyqxmd.com/read/29675787/meropenem-vaborbactam-a-carbapenem-and-beta-lactamase-inhibitor-with-activity-against-carbapenem-resistant-enterobacteriaceae
#2
REVIEW
Young R Lee, Nathaniel T Baker
Meropenem-vaborbactam is a carbapenem and β-lactamase inhibitor combination that is newly indicated for the treatment of complicated urinary tract infections (cUTI), including adult pyelonephritis. Vaborbactam was developed due to emergence of carbapenem-resistant strains of Enterobacteriaceae. In a phase I trial, patients that received meropenem-vaborbactam 2-2 g intravenously over 3 h every 8 h, Cmax was 58.2 ± 10.8 μg/mL for meropenem and 59.0 ± 8.4 μg/mL for vaborbactam. AUC0-8 was 186 ± 33...
April 19, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29675561/de-escalation-of-antifungal-treatment-in-critically-ill-patients-with-suspected-invasive-candida-infection-incidence-associated-factors-and-safety
#3
Karim Jaffal, Julien Poissy, Anahita Rouze, Sébastien Preau, Boualem Sendid, Marjorie Cornu, Saad Nseir
BACKGROUND: Antifungal treatment is common in critically ill patients, but only a small proportion of patients receiving antifungals have a proven fungal infection. However, antifungal treatment has side effects such as toxicity, emergence of resistance, and high cost. Moreover, empirical antifungal treatment is still a matter for debate in these patients. Our study aimed to determine the incidence, associated factors, and safety of de-escalation of antifungals in critically ill patients...
April 19, 2018: Annals of Intensive Care
https://www.readbyqxmd.com/read/29675420/regulation-of-long-noncoding-rnas-responsive-to-phytoplasma-infection-in-paulownia-tomentosa
#4
Guoqiang Fan, Yabing Cao, Zhe Wang
Paulownia witches' broom caused by phytoplasma infection affects the production of Paulownia trees worldwide. Emerging evidence showed that long noncoding RNAs (lncRNA) play a protagonist role in regulating the expression of genes in plants. So far, the identification of lncRNAs has been limited to a few model plant species, and their roles in mediating responses to Paulownia tomentosa that free of phytoplasma infection are yet to be characterized. Here, whole-genome identification of lncRNAs, based on strand-specific RNA sequencing, from four Paulownia tomentosa samples, was performed and identified 3689 lncRNAs...
2018: International Journal of Genomics
https://www.readbyqxmd.com/read/29675263/micro-ct-x-ray-imaging-exposes-structured-diffusion-barriers-within-biofilms
#5
Alona Keren-Paz, Vlad Brumfeld, Yaara Oppenheimer-Shaanan, Ilana Kolodkin-Gal
In nature, bacteria predominantly exist as highly structured biofilms, which are held together by extracellular polymeric substance and protect their residents from environmental insults, such as antibiotics. The mechanisms supporting this phenotypic resistance are poorly understood. Recently, we identified a new mechanism maintaining biofilms - an active production of calcite minerals. In this work, a high-resolution and robust µCT technique is used to study the mineralized areas within intact bacterial biofilms...
2018: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/29675258/livedo-reticularis-a-cutaneous-clue-to-an-underlying-endocrine-crisis
#6
Natasha Shrikrishnapalasuriyar, Mirena Noyvirt, Philip Evans, Bethan Gibson, Elin Foden, Atul Kalhan
A 54-year-old woman was admitted to hospital with a presumed allergic reaction to a single dose of amoxicillin given for a suspected upper respiratory tract infection. She complained of chest tightness although there was no wheeze or stridor. On examination, she was pyrexial, tachycardic, hypertensive and had a diffuse mottled rash on her lower limbs. Her initial investigations showed raised inflammatory markers. She was treated in the intensive care for a presumed anaphylactic reaction with an underlying sepsis...
2018: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/29675010/an-overview-of-hepatitis-b-virus-surface-antigen-secretion-inhibitors
#7
REVIEW
Alireza Mohebbi, Nazanin Lorestani, Alireza Tahamtan, Niki L Kargar, Alijan Tabarraei
Current anti-hepatitis B virus (HBV) regimen do not meet ideal result due to emerging resistance strains, cytotoxicity, and unfavorable adverse effects. In chronic HBV infection, high rates of sub-viral particles (SVPs) bearing HBV surface antigen (HBsAg) is a major obstacle regarding to raise effective immune responses and subsequently virus clearance. Development of potent HBsAg secretion inhibitors would provide a better insight into HBV immunopathogenesis and therapy. Investigating new non-toxic HBsAg secretion inhibitors targeting either viral or cellular factors could restore the immune response to remove virally infected hepatocytes after inhibiting SVPs...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29675007/mechanistic-and-structural-insights-into-the-unique-tetr-dependent-regulation-of-a-drug-efflux-pump-in-mycobacterium-abscessus
#8
Matthias Richard, Ana Victoria Gutiérrez, Albertus J Viljoen, Eric Ghigo, Mickael Blaise, Laurent Kremer
Mycobacterium abscessus is an emerging human pathogen causing severe pulmonary infections and is refractory to standard antibiotherapy, yet few drug resistance mechanisms have been reported in this organism. Recently, mutations in MAB_4384 leading to up-regulation of the MmpS5/MmpL5 efflux pump were linked to increased resistance to thiacetazone derivatives. Herein, the DNA-binding activity of MAB_4384 was investigated by electrophoretic mobility shift assays using the palindromic sequence IRS5/L5 located upstream of mmpS5/mmpL5 ...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29675006/the-rapid-emergence-of-tigecycline-resistance-in-bla-kpc-2-harboring-klebsiella-pneumoniae-as-mediated-in-vivo-by-mutation-in-teta-during-tigecycline-treatment
#9
Xiaoxing Du, Fang He, Qiucheng Shi, Feng Zhao, Juan Xu, Ying Fu, Yunsong Yu
Tigecycline is one of the last resort treatments for carbapenem-resistant Klebsiella pneumoniae (CRKP) infections. Tigecycline resistance often occurs during the clinical treatment of CRKP, yet its mechanism has still not been clearly elucidated. This study presents an analysis of a tigecycline resistance mechanism that developed in clinical isolates from a 56-year-old female patient infected with CRKP during tigecycline treatment. Consecutive clonal consistent K. pneumoniae isolates were obtained during tigecycline treatment...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29675003/role-of-micrornas-and-exosomes-in-helicobacter-pylori-and-epstein-barr-virus-associated-gastric-cancers
#10
REVIEW
Iva Polakovicova, Sofia Jerez, Ignacio A Wichmann, Alejandra Sandoval-Bórquez, Nicolás Carrasco-Véliz, Alejandro H Corvalán
Emerging evidence suggests that chronic inflammation caused by pathogen infection is connected to the development of various types of cancer. It is estimated that up to 20% of all cancer deaths is linked to infections and inflammation. In gastric cancer, such triggers can be infection of the gastric epithelium by either Helicobacter pylori ( H. pylori ), a bacterium present in half of the world population; or by Epstein-Barr virus (EBV), a double-stranded DNA virus which has recently been associated with gastric cancer...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29674657/emergence-of-vancomycin-resistant-enterococcus-faecium-at-an-australian-hospital-a-whole-genome-sequencing-analysis
#11
Kelvin W C Leong, Louise A Cooley, Tara L Anderson, Sanjay S Gautam, Belinda McEwan, Anne Wells, Fiona Wilson, Lucy Hughson, Ronan F O'Toole
In 2015, a marked increase in vancomycin-resistant Enterococcus faecium (VREfm) isolation was detected at the Royal Hobart Hospital, Australia. The primary objective of this work was to examine the dynamics of VREfm transmission using whole genome data mapped to public health surveillance information. Screening and clinical isolates of VREfm from patients were typed for the specific vancomycin-resistance locus present. Of total isolates collected from 2014-2016 (n = 222), 15.3% and 84.7% harboured either the vanA or the vanB vancomycin-resistance locus, respectively...
April 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29674516/pneumococcal-haemolytic-uraemic-syndrome-in-the-postvaccine-era
#12
Jolie Lawrence, Amanda Gwee, Catherine Quinlan
OBJECTIVE: Pneumococcal infection is a leading cause of haemolytic uraemic syndrome (HUS) and is potentially vaccine preventable. Published data suggest high mortality and poor renal outcomes. The introduction of the 7-valent pneumococcal conjugate vaccine (PCV) has seen the emergence of disease caused by non-vaccine strains, particularly 19A. We sought to describe serotype prevalence and outcomes, particularly after the introduction of the 13-valent PCV. DESIGN AND SETTING: We performed a retrospective chart review, using hospital medical records to identify cases of HUS in a tertiary paediatric hospital in Australia over a 20-year period (January 1997-December 2016)...
April 19, 2018: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/29674164/impact-of-r152k-and-r368k-neuraminidase-catalytic-substitutions-on-in-vitro-properties-and-virulence-of-recombinant-a-h1n1-pdm09-viruses
#13
Véronique Tu, Yacine Abed, Clément Fage, Mariana Baz, Guy Boivin
Neuraminidase (NA) mutations conferring resistance to NA inhibitors (NAIs) are expected to occur at framework or catalytic residues of the NA enzyme. Numerous clinical and in vitro reports already described NAI-resistant A(H1N1)pdm09 variants harboring various framework NA substitutions. By contrast, variants with NA catalytic changes remain poorly documented. Herein, we investigated the effect of R152K and R368K NA catalytic mutations on the NA enzyme properties, in vitro replicative capacity and virulence of A(H1N1)pdm09 recombinant viruses...
April 16, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29673810/a-systematic-review-of-emerging-respiratory-viruses-at-the-hajj-and-possible-coinfection-with-streptococcus-pneumoniae
#14
REVIEW
Jaffar A Al-Tawfiq, Samir Benkouiten, Ziad A Memish
BACKGROUND: The annual Hajj to the Kingdom of Saudi Arabia attracts millions of pilgrims from around the world. International health community's attention goes towards this mass gathering and the possibility of the development of any respiratory tract infections due to the high risk of acquisition of respiratory viruses. METHOD: We searched MEDLINE/PubMed and Scopus databases for relevant papers describing the prevalence of respiratory viruses among Hajj pilgrims...
April 16, 2018: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/29673698/-which-information-is-given-during-the-purchase-of-an-hiv-self-test-in-a-caen-pharmacy-a-comprehensive-transversal-and-observational-study-using-surveys-without-modification-of-practice
#15
S Guitton, A Rabiaza
INTRODUCTION: HIV infection affects about 150,000 people in France. In total, 30,000 of them are unaware of their serostatus. In this context, HIV self-testing has arrived in France in September 2015. The aim of our study was to analyze the level of application of the recommendations during the purchase of an HIV self-test. Our primary hypothesis was that the delivered information is poor. METHODS: We realized a comprehensive transversal and observational study with surveys without modification of practice in all Caen pharmacies...
April 16, 2018: Annales Pharmaceutiques Françaises
https://www.readbyqxmd.com/read/29673386/risk-factors-and-short-term-outcomes-of-postoperative-pulmonary-complications-after-vats-lobectomy
#16
Paula J Agostini, Sebastian T Lugg, Kerry Adams, Tom Smith, Maninder S Kalkat, Pala B Rajesh, Richard S Steyn, Babu Naidu, Alison Rushton, Ehab Bishay
BACKGROUND: Postoperative pulmonary complications (PPCs) are associated with poor outcomes following thoracotomy and lung resection. Video-assisted thoracoscopic surgery (VATS) for lobectomy is now frequently utilised as an alternative to thoracotomy, however patients remain at risk for development of PPC. There is little known of the short-term outcome associated with PPC following VATS lobectomy and if there are any potential risk factors that could be modified to prevent PPC development; our study aimed to investigate this...
April 12, 2018: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29673334/full-blood-count-values-as-a-predictor-of-poor-outcome-of-pneumonia-among-hiv-infected-patients
#17
S Camon, C Quiros, N Saubi, A Moreno, M A Marcos, Y Eto, S Rofael, E Monclus, J Brown, T D McHugh, J Mallolas, R Perello
BACKGROUND: To evaluate the predictive value of analytical markers of full blood count that can be assessed in the emergency department for HIV infected patients, with community-acquired pneumonia (CAP). METHODS: Prospective 3-year study including all HIV-infected patients that went to our emergency department with respiratory clinical infection, more than 24-h earlier they were diagnosed with CAP and required admission. We assessed the different values of the first blood count performed on the patient as follows; total white blood cells (WBC), neutrophils, lymphocytes (LYM), basophils, eosinophils (EOS), red blood cells (RBC), hemoglobin, hematocrit, mean corpuscular volume, mean corpuscular hemoglobin concentration, mean corpuscular hemoglobin, red blood cell distribution width (RDW), platelets (PLT), mean platelet volume, and platelet distribution width (PDW)...
April 19, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29673319/carbapenemase-producing-enterobacteriaceae-in-mexico-report-of-seven-non-clonal-cases-in-a-pediatric-hospital
#18
Alejandra Aquino-Andrade, Jocelin Merida-Vieyra, Eduardo Arias de la Garza, Patricia Arzate-Barbosa, Agustín De Colsa Ranero
BACKGROUND: Carbapenemases-producing Enterobacteriaceae (CPE) are a worldwide public health emergency. In Mexico, reports of CPE are limited, particularly in the pediatric population. Here, we describe the clinical, epidemiological, and molecular characteristics of seven consecutive cases in a third-level pediatric hospital in Mexico City over a four-month period during 2016. RESULTS: The Enterobacteriaceae identified were three Escherichia coli strains (producing OXA-232, NDM-1 and KPC-2), two Klebsiella pneumoniae strains (producing KPC-2 and NDM-1), one Klebsiella oxytoca strain producing OXA-48 and one Enterobacter cloacae strain producing NDM-1...
April 19, 2018: BMC Microbiology
https://www.readbyqxmd.com/read/29673200/surface-and-extracellular-proteome-of-the-emerging-pathogen-corynebacterium-ulcerans
#19
Miriam Bittel, Susanne Gastiger, Bushra Amin, Jörg Hofmann, Andreas Burkovski
Corynebacterium ulcerans is an emerging pathogen, which is increasingly recognized as an etiological agent of diphtheria, but can also evoke ulcers of the skin and systemic infections in humans. Besides man, the bacteria can colonize a wide variety of different animals, including cattle and pet animals, which might serve as a reservoir for human infections. In this study, surface-located proteins and the exoproteome of two Corynebacterium ulcerans strains were analyzed, since these may have key roles in the interaction of the pathogen with host cells...
April 17, 2018: Proteomes
https://www.readbyqxmd.com/read/29673137/herb-induced-liver-injuries-in-developing-nations-an-update
#20
REVIEW
Cecilia Nwadiuto Amadi, Orish Ebere Orisakwe
The last few decades have seen a rise in the use of herbal supplements, natural products, and traditional medicines. However, there are growing concerns related to the safety and toxicities of these medicines. These herbal medicines are associated with complications such as liver damage with a high incidence of mortalities and morbidities. Clinical manifestations range from asymptomatic cases with abnormal liver functions tests to sudden and severe liver failure necessitating liver transplantation. This work aimed to review the etiology, risk factors, diagnosis, clinical manifestations and selected clinical case reports of herbal hepatotoxicity in developing nations...
April 17, 2018: Toxics
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