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Emerging Infections

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https://www.readbyqxmd.com/read/29679740/dissecting-host-cell-death-programs-in-the-pathogenesis-of-influenza
#1
Jeffrey Downey, Erwan Pernet, François Coulombe, Maziar Divangahi
Influenza A virus (IAV) is a pulmonary pathogen, responsible for significant yearly morbidity and mortality. Due to the absence of highly effective antiviral therapies and vaccine, as well as the constant threat of an emerging pandemic strain, there is considerable need to better understand the host-pathogen interactions and the factors that dictate a protective versus detrimental immune response to IAV. Even though evidence of IAV-induced cell death in human pulmonary epithelial and immune cells has been observed for almost a century, very little is known about the consequences of cell death on viral pathogenesis...
April 18, 2018: Microbes and Infection
https://www.readbyqxmd.com/read/29679424/lomentospora-prolificans-fungemia-in-hematopoietic-stem-cell-transplant-patients-first-report-in-south-america-and-literature-review
#2
Fernando D Penteado, Nadia Litvinov, Jaques Sztajnbok, Danilo Y Thomaz, Antonio M Dos Santos, Dewton M Vasconcelos, Adriana L Motta, Flávia Rossi, Juliana F Fernandes, Heloisa Helena S Marques, Gil Benard, João N de Almeida Júnior
Lomentospora prolificans is a filamentous fungus and an emerging pathogen in immunocompromised patients. It is encountered most commonly in Australia, Spain, and USA. We described the first case of Lomentospora prolificans fungemia in South America. The patient was a hematopoietic stem cell transplantation (HSCT) recipient who developed the infection 37 days after stem cells infusion. In addition, we performed a literature review of invasive lomentosporiosis in HSCT patients. This article is protected by copyright...
April 20, 2018: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29679152/treatment-of-acute-uncomplicated-diverticulitis-without-antibiotics-risk-factors-for-treatment-failure
#3
H E Bolkenstein, W A Draaisma, Bjm van de Wall, Ecj Consten, Iamj Broeders
PURPOSE: Conservative treatment strategy without antibiotics in patients with uncomplicated diverticulitis (UD) has proven to be safe. The aim of the current study is to assess the clinical course of UD patients who were initially treated without antibiotics and to identify risk factors for treatment failure. METHODS: A retrospective cohort study was performed including all patients with a CT-proven episode of UD (defined as modified Hinchey 1A). Only non-immunocompromised patients who presented without signs of sepsis were included...
April 21, 2018: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/29679151/comparisons-of-the-surgical-outcomes-and-medical-costs-between-transferred-and-directly-admitted-patients-diagnosed-with-intestinal-obstruction-in-an-american-tertiary-referral-center
#4
Xian Hua Gao, Hanumant Chouhan, Emre Gorgun, Luca Stocchi, Gokhan Ozuner
PURPOSE: Intestinal obstruction is a leading cause of patient mortality and the most common reason for emergent operation in colorectal surgery. The influence of inter-hospital transfer on patients' outcomes varies greatly in different diseases. We aimed to compare the surgical outcomes and medical costs between transferred and directly admitted patients diagnosed with intestinal obstruction in an American tertiary referral center. METHODS: All intestinal obstruction patients operated in Cleveland Clinic from Jan 2012 to Dec 2016 were collected from a prospectively maintained database...
April 20, 2018: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/29678751/glucagon-like-peptide-1-receptor-signaling-attenuates-rsv-induced-type-2-responses-and-immunopathology
#5
Melissa H Bloodworth, Mark Rusznak, Connor C Pfister, Jian Zhang, Lisa Bastarache, Sandra Alvarez Calvillo, James D Chappell, Kelli L Boyd, Shinji Toki, Dawn C Newcomb, Matthew T Stier, Weisong Zhou, Kasia Goleniewska, Martin L Moore, Tina V Hartert, Kevin D Niswender, R Stokes Peebles
GLP-1R signaling, an emerging anti-inflammatory therapeutic target, attenuated type 2-associated immunopathology in mice infected with a strain of RSV that was isolated from a hospitalized infant with severe lower respiratory tract infection and bronchiolitis.
April 17, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29678699/acute-communicating-hydrocephalus-as-spinal-cord-surgery-complication-in-a-patient-with-lumbar-lipomyelocele-case-report
#6
Alessandro Prior, Mariasavina Severino, Andrea Rossi, Marco Pavanello, Gianluca Piatelli, Alessandro Consales
BACKGROUND: A lumbar lipomyelocele is a closed spinal dysraphism that can cause tethered cord syndrome. Between 5-15% of spinal dysraphism surgery cases are burdened with complications, the most common being wound infections or dehiscence and cerebrospinal fluid leak. Acute communicating hydrocephalus has never been described as a complication of this type of surgery. CASE DESCRIPTION: A 6-year-old girl, who had undergone several surgeries in another Institution for lumbar lipomyeloschisis, came to our attention for a second opinion about the management of her spinal dysraphism...
April 17, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29678480/gram-negative-anaerobe-susceptibility-testing-in-clinical-isolates-using-sensititre-and-etest-methods
#7
C Hughes, C Ashhurst-Smith, J K Ferguson
Gram negative anaerobic organisms are important pathogens in a range of clinical infections, and susceptibility testing is not commonly performed in the microbiology laboratory. We performed anaerobic susceptibility testing on 70 clinically relevant Gram negative anaerobes isolated from routine cultures in a busy diagnostic laboratory which were identified by MALDI-TOF mass spectrometry (MALDI-TOF MS). The susceptibility testing was performed by two methods: Sensititre trays (ThermoFisher Scientific) against 15 different antibiotics, and Etests (bioMérieux) against five clinically relevant antibiotics (metronidazole, piperacillin-tazobactam, amoxicillin-clavulanate, meropenem and clindamycin)...
April 17, 2018: Pathology
https://www.readbyqxmd.com/read/29677915/xploit-an-ontology-based-data-integration-platform-supporting-the-development-of-predictive-models-for-personalized-medicine
#8
Gabriele Weiler, Ulf Schwarz, Jochen Rauch, Kerstin Rohm, Thorsten Lehr, Stefan Theobald, Stephan Kiefer, Katharina Götz, Katharina Och, Nico Pfeifer, Lisa Handl, Sigrun Smola, Matthias Ihle, Amin T Turki, Dietrich W Beelen, Jürgen Rissland, Jörg Bittenbring, Norbert Graf
Predictive models can support physicians to tailor interventions and treatments to their individual patients based on their predicted response and risk of disease and help in this way to put personalized medicine into practice. In allogeneic stem cell transplantation risk assessment is to be enhanced in order to respond to emerging viral infections and transplantation reactions. However, to develop predictive models it is necessary to harmonize and integrate high amounts of heterogeneous medical data that is stored in different health information systems...
2018: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/29677479/rig-i-and-other-rna-sensors-in-antiviral-immunity
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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