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https://www.readbyqxmd.com/read/29791951/nervous-system-infections-and-the-global-traveler
#1
Savina Reid, Haley Thompson, Kiran T Thakur
Neurological complications of infectious diseases are associated with high rates of morbidity and mortality. It is imperative that neurologists be up-to-date on current developments including typical and atypical presentations of neurological infections in travelers, diagnostic and treatment recommendations, and emerging pathogen resistance patterns to avoid fatal outcomes and long-term sequelae. This article will address concepts of emerging and reemerging infectious diseases, and will provide updates on the neurological manifestations of select emerging and reemerging infections, including Ebola virus, bacterial meningitis, enterovirus 71, Zika virus, cerebral malaria, and Japanese encephalitis...
April 2018: Seminars in Neurology
https://www.readbyqxmd.com/read/29783172/headspace-sorptive-extraction-gas-chromatography-mass-spectrometry-method-to-measure-volatile-emissions-from-human-airway-cell-cultures
#2
Mei S Yamaguchi, Mitchell M McCartney, Angela L Linderholm, Susan E Ebeler, Michael Schivo, Cristina E Davis
The human respiratory tract releases volatile metabolites into exhaled breath that can be utilized for noninvasive health diagnostics. To understand the origin of this metabolic process, our group has previously analyzed the headspace above human epithelial cell cultures using solid phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS). In the present work, we improve our model by employing sorbent-covered magnetic stir bars for headspace sorptive extraction (HSSE). Sorbent-coated stir bar analyte recovery increased by 52 times and captured 97 more compounds than SPME...
May 12, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29777224/progression-of-whole-blood-transcriptional-signatures-from-interferon-induced-to-neutrophil-associated-patterns-in-severe-influenza
#3
Jake Dunning, Simon Blankley, Long T Hoang, Mike Cox, Christine M Graham, Philip L James, Chloe I Bloom, Damien Chaussabel, Jacques Banchereau, Stephen J Brett, Miriam F Moffatt, Anne O'Garra, Peter J M Openshaw
Transcriptional profiles and host-response biomarkers are used increasingly to investigate the severity, subtype and pathogenesis of disease. We now describe whole-blood mRNA signatures and concentrations of local and systemic immunological mediators in 131 adults hospitalized with influenza, from whom extensive clinical and investigational data were obtained by MOSAIC investigators. Signatures reflective of interferon-related antiviral pathways were common up to day 4 of symptoms in patients who did not require mechanical ventilator support; in those who needed mechanical ventilation, an inflammatory, activated-neutrophil and cell-stress or death ('bacterial') pattern was seen, even early in disease...
May 18, 2018: Nature Immunology
https://www.readbyqxmd.com/read/29775092/a-prospective-multi-centre-us-clinical-trial-to-determine-accuracy-of-febridx-point-of-care-testing-for-acute-upper-respiratory-infections-with-and-without-a-confirmed-fever
#4
Nathan I Shapiro, Wesley H Self, Jeffrey Rosen, Stephan C Sharp, Michael R Filbin, Peter C Hou, Amisha D Parekh, Michael C Kurz, Robert Sambursky
BACKGROUND: FebriDx is a 10-minute disposable point-of-care test designed to identify clinically significant systemic host immune responses and aid in the differentiation of bacterial and viral respiratory infection by simultaneously detecting C-reactive protein (CRP) and myxovirus resistance protein A (MxA) from a fingerstick blood sample. FebriDx diagnostic accuracy was evaluated in the emergency room and urgent care setting. METHODS: A prospective, multicentre, observational cohort study of acute upper respiratory tract infections (URIs), with and without a confirmed fever at the time of enrolment, was performed to evaluate the diagnostic accuracy of FebriDx to identify clinically significant bacterial infection with host response and acute pathogenic viral infection...
May 18, 2018: Annals of Medicine
https://www.readbyqxmd.com/read/29774070/role-of-extracellular-vesicles-in-viral-and-bacterial-infections-pathogenesis-diagnostics-and-therapeutics
#5
REVIEW
Meryl Rodrigues, Jia Fan, Christopher Lyon, Meihua Wan, Ye Hu
Extracellular vesicles (EVs), or exosomes, are nanovesicles of endocytic origin that carry host and pathogen-derived protein, nucleic acid, and lipid cargos. They are secreted by most cell types and play important roles in normal cell-to-cell communications but can also spread pathogen- and host-derived molecules during infections to alter immune responses and pathophysiological processes. New research is beginning to decipher how EVs influence viral and bacterial pathogenesis. In this review, we will describe how EVs influence viral and bacterial pathogenesis by spreading pathogen-derived factors and how they can promote and inhibit the immune response to these pathogens...
2018: Theranostics
https://www.readbyqxmd.com/read/29766733/-hemophagocytic-lymfohistiocytosis-in-adults-review-and-case-report
#6
Jiří Šrámek, Thomas Karvunidis, Daniel Lysák, Martin Harazim, Michal Karas, Pavel Jindra
Hemophagocytic lymfohistiocytosis (HLH) is rare, life-threatening condition, characterized by excessive activation of immune system with subsequent proinflammatory state resulting in multiorgan failure. Most frequently, it appears in infancy as a primary disorder caused by mutation of immune-regulatory genes. Increasingly, HLH is being diagnosed as a secondary - adult - form, which occurs as a result of aberrant immune response. Viral or bacterial systemic infections, malignancy with a predominance of lymphoproliferative disorders and autoimmune diseases are the most common triggers...
2018: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/29764228/anti-infective-chemoprophylaxis-after-solid-organ-transplantation
#7
Paul J Deziel, Raymund Razonable
Solid organ transplant recipients are at high risk of opportunistic infections due to bacterial, viral, fungal and parasitic pathogens. Anti-infective prophylaxis is a time-tested proven strategy for the prevention of these infections after solid organ transplantation. Areas covered: The current recommendations for the prevention of surgical site infections, herpes simplex, cytomegalovirus, invasive fungal infections, and selected parasitic diseases are highlighted. Recent peer-reviewed publications on the prevention of infection after solid organ transplantation were reviewed and their significance was discussed in the context of the current recommendations for preventing infectious complications...
May 15, 2018: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/29755533/new-onset-colitis-in-an-adult-patient-with-chronic-granulomatous-disease-treated-with-hematopoietic-stem-cell-transplantation-a-diagnostic-dilemma
#8
Kara Robertson, Stephen Couban, Desmond Leddin, Imran Ahmad, Lori Connors
Background: Chronic granulomatous disease (CGD) is a rare primary immunodeficiency characterized by recurrent life-threatening bacterial and fungal infections, granuloma formation and intestinal disease. This disease is caused by defects in NADPH oxidase, which result in the inability of phagocytes (neutrophils, monocytes and macrophages) to destroy certain microbes. The only established curative therapy for CGD is hematopoietic stem cell transplantation. Case presentation: A 23-year-old Caucasian male with X-linked chronic granulomatous disease underwent a reduced-intensity conditioning, matched unrelated donor peripheral blood stem cell transplant, after which he was started on tacrolimus and mycophenolate for graft-versus-host disease prophylaxis...
2018: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/29748124/contribution-of-the-filmarray-%C3%A2-gastrointestinal-panel-in-the-laboratory-diagnosis-of-gastroenteritis-in-a-cohort-of-children-a-two-year-prospective-study
#9
Adriana Calderaro, Monica Martinelli, Mirko Buttrini, Sara Montecchini, Silvia Covan, Sabina Rossi, Francesca Ferraglia, Paolo Montagna, Federica Pinardi, Sandra Larini, Maria Cristina Arcangeletti, Maria Cristina Medici, Carlo Chezzi, Flora De Conto
This study represents a 2-year picture of the epidemiology of enteric pathogens in children suffering from gastroenteritis using the FilmArray® Gastrointestinal Panel (FA-GP), a multiplex molecular assay that allows to simultaneously detect a large panel of pathogens independently of the etiological suspicion and to evaluate its potential contribution to the diagnosis compared to the conventional methods. A total of 1716 stool samples, collected from children with clinical suspicion of bacterial and/or viral gastroenteritis attending the University Hospital of Parma, was submitted to the FA-GP and, when an adequate aliquot was available, to electron microscopy (n = 1163) for virus detection and to an enterovirus-targeting real-time PCR (n = 1703)...
May 2, 2018: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/29746951/oligonucleotide-aptamers-promising-and-powerful-diagnostic-and-therapeutic-tools-for-infectious-diseases
#10
REVIEW
Qin Pan, Fengling Luo, Min Liu, Xiao-Lian Zhang
The entire human population is at risk of infectious diseases worldwide. Thus far, the diagnosis and treatment of human infectious diseases at the molecular and nanoscale levels have been extremely challenging tasks because of the lack of effective probes to identify and recognize biomarkers of pathogens. Oligonucleotide aptamers are a class of small nucleic acid ligands that are composed of single-stranded DNA (ssDNA) or RNA and act as affinity probes or molecular recognition elements for a variety of targets...
May 7, 2018: Journal of Infection
https://www.readbyqxmd.com/read/29719801/an-unusual-presentation-of-a-case-of-human-psittacosis
#11
Yannick Vande Weygaerde, Charlot Versteele, Elke Thijs, Anton De Spiegeleer, Jerina Boelens, Daisy Vanrompay, Eva Van Braeckel, Karim Vermaelen
Background: Chlamydia psittaci is a gram-negative, obligate intracellular organism. Birds are the main reservoir, but also non-avian domestic animals and humans can be infected. In humans it mostly causes respiratory infections due to occupational exposure with varying severity. Sensitive and specific diagnostic tests are needed to define psittacosis in humans as these tests also allow rapid tracing of the animal source. However, diagnosis in humans is often based on time-consuming culture techniques and antibody detection assays as in many countries, the existing molecular diagnostic tests for psittacosis are not reimbursed by the public health insurance...
2018: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/29715551/severe-infections-in-critically-ill-solid-organ-transplant-patients
#12
REVIEW
Andre C Kalil, Uriel Sandkovsky, Diana F Florescu
BACKGROUND: Severe infections are among the most common causes of death in immunocompromised patients admitted to the intensive care unit. The epidemiology, diagnosis, and treatment of these infections has evolved in the last decade. AIMS: We aim to provide a comprehensive review of these severe infections in this population. SOURCES: Review of the literature pertaining to severe infections in critically ill solid organ transplant (SOT) patients...
April 28, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29713032/a-molecular-multi-gene-classifier-for-disease-diagnostics
#13
Randolph Lopez, Ruofan Wang, Georg Seelig
Despite its early promise as a diagnostic and prognostic tool, gene expression profiling remains cost-prohibitive and challenging to implement in a clinical setting. Here, we introduce a molecular computation strategy for analysing the information contained in complex gene expression signatures without the need for costly instrumentation. Our workflow begins by training a computational classifier on labelled gene expression data. This in silico classifier is then realized at the molecular level to enable expression analysis and classification of previously uncharacterized samples...
April 30, 2018: Nature Chemistry
https://www.readbyqxmd.com/read/29700762/a-host-protein-signature-is-superior-to-other-biomarkers-for-differentiating-between-bacterial-and-viral-disease-in-patients-with-respiratory-infection-and-fever-without-source-a-prospective-observational-study
#14
Liat Ashkenazi-Hoffnung, Kfir Oved, Roy Navon, Tom Friedman, Olga Boico, Meital Paz, Gali Kronenfeld, Liat Etshtein, Asi Cohen, Tanya M Gottlieb, Eran Eden, Irina Chistyakov, Isaac Srugo, Adi Klein, Shai Ashkenazi, Oded Scheuerman
Bacterial and viral infections often present with similar symptoms. Etiologic misdiagnosis can alter the trajectory of patient care, including antibiotic overuse. A host-protein signature comprising tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), interferon gamma-induced protein-10 (IP-10), and C-reactive protein (CRP) was validated recently for differentiating bacterial from viral disease. However, a focused head-to-head comparison of its diagnostic performance against other biomarker candidates for this indication was lacking in patients with respiratory infection and fever without source...
April 26, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29697654/-the-specific-features-of-the-clinical-course-and-the-treatment-strategy-in-the-children-presenting-with-viral-sinusitis
#15
E Yu Radtsig, L V Malygina
The objective of the present study was to elucidate the peculiar features of acute viral and bacterial sinusitis in the children and to elaborate the algorithm for their treatment based on the results of the primary clinical and laboratory examination. As many as 224 children at the age varying from 1-17 years suffering from acute sinusitis were enrolled in the study. The following methods were employed for the purpose of the study; the analysis of the medical histories of the patients, general examination by an otorhinolaryngologist, diagnostic endoscopy of the nasal cavity and nasopharynx, radiological studies and computed tomography of the paranasal sinuses, echosinusoscopy, the comprehensive microbiological and virological investigation, and evaluation of the peripheral blood characteristics...
2018: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/29695524/evaluation-of-targeted-next-generation-sequencing-for-detection-of-bovine-pathogens-in-clinical-samples
#16
Eman Anis, Ian K Hawkins, Marcia R S Ilha, Moges W Woldemeskel, Jeremiah T Saliki, Rebecca P Wilkes
The laboratory diagnosis of infectious diseases, especially those caused by mixed infections, is challenging. Routinely, this requires submission of multiple samples to separate laboratories. Advances in next-generation sequencing (NGS) have provided the opportunity for development of a comprehensive method to identify infectious agents. This study describes the use of target-specific primers for PCR-mediated amplification with the NGS technology, in which pathogen genomic regions of interest are enriched and selectively sequenced from clinical samples...
April 25, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29668068/epidemiology-risk-factors-and-outcomes-of-invasive-aspergillosis-in-solid-organ-transplant-recipients-in-the-swiss-transplant-cohort-study
#17
D Neofytos, O Chatzis, D Nasioudis, E Boely Janke, T Doco Lecompte, C Garzoni, C Berger, A Cussini, K Boggian, N Khanna, O Manuel, N J Mueller, C van Delden
BACKGROUND: There is lack of recent multicenter epidemiological data on invasive aspergillosis (IA) among solid organ transplant recipient (SOTr) in the mold-acting antifungal era. We describe the epidemiology and outcomes of IA in a contemporary cohort of SOTr using the Swiss Transplant Cohort Study. METHODS: All consecutive SOTr with proven or probable IA between 01.05.2008 and 31.12.2014 were included. A case-control study to identify IA predictors was performed: 1-case was matched with 3-controls based on SOT type, transplant center, and time post-SOT...
April 18, 2018: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29656308/bacterial-lipid-modification-of-icp11-and-a-new-elisa-system-applicable-for-wssv-infection-detection
#18
Vidhyapriya Murugan, Krishnan Sankaran
In ELISA, a popular analytical diagnostic tool, the stable non-covalent immobilization (coating) of hydrophilic proteins/peptides on to hydrophobic polystyrene surface has remained a major common challenge. Recombinant bacterial lipid modification of proteins in Escherichia coli system has been shown in this study to solve this problem owing to the hydrophobic anchorage provided by three fatty acyl groups in N-acyl-S-diacylglyceryl Cys at the N-terminus. Exploiting this first post-translational protein engineering, the most abundantly expressed white spot syndrome viral protein ICP11 was lipid-modified and tested as a new target in a new ELISA method useful to shrimp farming...
April 14, 2018: Marine Biotechnology
https://www.readbyqxmd.com/read/29629856/use-of-genomics-to-design-a-diagnostic-assay-to-discriminate-between-streptococcus-pneumoniae-and-streptococcus-pseudopneumoniae
#19
Matthew A Croxen, Tracy D Lee, Robert Azana, Linda M Hoang
Distinuishing the species of mitis group streptococci is challenging due to ambiguous phenotypic characteristics and high degree of genetic similarity. This has been particularly true for resolving atypical Streptococcus pneumoniae and Streptococcus pseudopneumoniae. We used phylogenetic clustering to demonstrate specific and separate clades for both S. pneumoniae and S. pseudopneumoniae genomes. The genomes that clustered within these defined clades were used to extract species-specific genes from the pan-genome...
April 9, 2018: Microbial Genomics
https://www.readbyqxmd.com/read/29620789/infectious-meningitis-encephalitis-evaluation-of-a-rapid-and-fully-automated-multiplex-pcr-in-the-microbiological-diagnostic-workup
#20
Giulia Piccirilli, Angela Chiereghin, Liliana Gabrielli, Maddalena Giannella, Diego Squarzoni, Gabriele Turello, Silvia Felici, Caterina Vocale, Roberta Zuntini, Dino Gibertoni, Alberto Enrico Maraolo, Simone Ambretti, Tiziana Lazzarotto
Infectious diseases of the central nervous system (CNS) such as meningitis/encephalitis (ME) require rapid identification of causative pathogens for effective treatment. This study evaluated the analytical performance and clinical utility of a fully automated multiplex PCR test to improve the microbiological diagnostic workup of ME. Seventy-seven cerebrospinal fluid (CSF) samples from 77 patients with suspected ME were studied. The samples were tested by FilmArray™ (FA) ME Panel test and the results were compared with those obtained using conventional microbiological procedures (CMP)...
April 5, 2018: New Microbiologica
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