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https://www.readbyqxmd.com/read/28529026/the-use-of-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-maldi-tof-ms-for-rapid-bacterial-identification-in-patients-with-smear-positive-bacterial-meningitis
#1
Boaz Bishop, Yuval Geffen, Adi Plaut, Ola Kassis, Roni Bitterman, Mical Paul, Ami Neuberger
OBJECTIVES: To assess the potential of matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) in rapid identification of bacteria from smear-positive cerebrospinal fluid (CSF) in a cohort of patients with meningitis. METHODS: Single-center observational study, including adults and children with community-acquired or postneurosurgical bacterial meningitis. Meningitis was defined using established criteria. CSF samples that had a positive CSF Gram stain were directly examined by MALDI-TOF-MS...
May 18, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28524748/an-unwanted-guest-neisseria-meningitides-carriage-risk-for-invasive-disease-and-the-impact-of-vaccination-with-insights-from-italy-incidence
#2
Elena Gianchecchi, Giulia Piccini, Alessandro Torelli, Rino Rappuoli, Emanuele Montomoli
Invasive Meningococcal Disease (IMD) represents a potentially life-threatening condition caused by Neisseria meningitidis. The disease is characterized by a case fatality rate of 5-10% whereas serious clinical sequelae can develop in survivors within 12-24 hours from the first symptoms. However, IMD infection only occurs rarely, in fact, most of the interactions established between N. meningitidis and the host are harmless, and an estimated 10% of the population asymptomatically carries the bacterium in the nasopharynx...
May 19, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28518025/rise-in-group-w-meningococcal-carriage-in-university-students-united-kingdom
#3
Neil J Oldfield, Caroline Cayrou, Mahab A K AlJannat, Ali A A Al-Rubaiawi, Luke R Green, Shehzan Dada, Oliver D Steels, Christopher Stirrup, Joe Wanford, Banan A Y Atwah, Christopher D Bayliss, David P J Turner
MenACWY conjugate vaccination was recently introduced in the United Kingdom for adolescents and young adults to reduce disease from infection by Neisseria meningitidis group W. We conducted a cross-sectional meningococcal carriage study in first-year UK university students. Despite 71% MenACWY vaccine coverage, carriage of group W increased substantially.
June 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28514990/prevalence-of-pora-pseudogene-deletion-among-neisseria-gonorrhoeae-isolates-referred-to-the-uk
#4
Martina Toby, Pamela Saunders, Michelle Cole, Vlad Grigorjev, Sarah Alexander, Catherine Ison
porA pseudogene-negative Neisseria gonorrhoeae isolates produce false-negative results when examined by polymerase chain reaction (PCR) with porA pseudogene targets. In the present study, 533 representative gonococcal isolates received in 2011 via the Gonococcal Resistance to Antimicrobials Surveillance Program were examined to determine the prevalence of porA-negative isolates. Less than 0.4% (2/533) of isolates were found to be reproducibly negative with the porA real-time PCR but were confirmed as N. gonorrhoeae with molecular, biochemical and immunological confirmatory tests...
May 18, 2017: Sexual Health
https://www.readbyqxmd.com/read/28513815/epidemiology-of-paediatric-meningitis-in-central-c%C3%A3-te-d-ivoire-after-the-implementation-of-haemophilus-influenzae-type-b-vaccination
#5
Fidèle S Touré, Samson Kouame, Honoré Tia, Pacôme Monemo, Amadou Cissé, Bamourou Diané, Sören L Becker, Chantal Akoua-Koffi
Infectious meningitis accounts for enormous morbidity worldwide, but there is a paucity of data on its regional epidemiology in resource-constrained settings of sub-Saharan Africa. Here, we present a study on the aetiology of paediatric meningitis in central Côte d'Ivoire. Between June 2012 and December 2013, all cerebrospinal fluid (CSF) samples drawn at the University Teaching Hospital Bouaké were examined for the presence of bacterial and fungal pathogens. A causative agent was detected in 31 out of 833 CSF specimens (3...
May 17, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28508419/case-control-study-shows-that-neonatal-pneumococcal-meningitis-cannot-be-distinguished-from-group-b-streptococcus-cases
#6
Alexandra Arfi, Robert Cohen, Emmanuelle Varon, Stéphane Béchet, Stéphane Bonacorsi, Corinne Levy
AIM: Streptococcus pneumoniae (S. pneumoniae) is sometimes implicated in neonatal bacterial meningitis. This study described the demographic, clinical and biological features of neonatal S. pneumoniae meningitis and compared pneumococcal and group B streptococcal (GBS) neonatal meningitis. METHODS: We conducted a case-control study that compared neonates, aged one to 28 days with S. pneumoniae meningitis or GBS meningitis. Each case with S. pneumoniae was randomly matched to four control patients with GBS by age group and study year...
May 16, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28501716/cross-protection-in-neisseria-meningitidis-serogroups-y-and-w-polysaccharides-a-comparative-conformational-analysis
#7
Michelle M Kuttel, Zaheer Timol, Neil Ravenscroft
The capsular polysaccharide is the main virulence factor in meningococcus. The capsular polysaccharides for meningococcal serogroups Y and W are almost identical polymers of hexose-sialic acid, suggesting the possibility of cross-protection between group Y and W vaccines. However, early studies indicated that they elicit different levels of cross-protection. Here we explore the conformations of the meningococcal Y and W polysaccharides with molecular dynamics simulations of three repeating unit oligosaccharide strands...
May 10, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28495657/outer-membrane-vesicles-extracted-from-neisseria-meningitidis-serogroup-x-for-prevention-of-meningococcal-disease-in-africa
#8
Reinaldo Acevedo, Caridad Zayas, Gunnstein Norheim, Sonsire Fernández, Barbara Cedré, Yisabel Aranguren, Maribel Cuello, Yaimara Rodriguez, Humberto González, Aleida Mandiarote, Marylin Pérez, Maritza Hernández, Mabel Hernández-Cedeño, Domingo González, Sverre-Henning Brorson, Einar Rosenqvist, Lisbeth Naess, Gro Tunheim, Daniel Cardoso, Luis García
Meningococcal disease is caused mainly by serogroups A, B, C, Y, W of N. meningitidis. However, numerous cases of meningitis caused by serogroup X N. meningitidis (MenX) have recently been reported in several African countries. Currently, there are no licensed vaccines against this pathogen and most of the MenX cases have been caused by meningococci from clonal complex (c.c) 181. Detergent extracted meningococcal outer membrane vesicle (dOMV) vaccines have previously shown to be safe and effective against epidemics of serogroup B meningococcal disease in all age groups...
May 8, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28490424/waning-immunity-and-microbial-vaccines-workshop-of-the-national-institute-of-allergy-and-infectious-diseases
#9
Xin-Xing Gu, Stanley A Plotkin, Kathryn M Edwards, Alessandro Sette, Kingston H G Mills, Ofer Levy, Andrea J Sant, Annie Mo, William Alexander, Kristina T Lu, Christopher E Taylor
Since the middle of the 20th century, vaccines have made a significant public health impact controlling infectious diseases globally. Although long-term protection has been achieved with some vaccines, immunity wanes over time with others, resulting in outbreaks or epidemics of infectious diseases. Long-term protection against infectious agents with complex life cycles and antigenic variation remains a key challenge. Novel strategies to characterize the short and long-term immune responses to vaccines, and to induce immune responses that mimic natural infection have recently emerged...
May 10, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28487799/primary-meningococcal-type-c-arthritis-a-case-report-and-literature-review
#10
Maximiliano Barahona, Jaime Catalan, Yoshiro Sato, Jaime Hinzpeter
Acute septic arthritis is a common clinical problem in emergency departments. Primary meningococcal arthritis (PMA) is very rare and few cases are reported in literature. D. B. M. consulted the emergency department for knee pain and fever; analysis showed that the cause was a Neisseria meningitidis type C infection. He received a treatment consisting of 2 arthroscopies and 5 weeks of antibiotics. At five weeks he returned to work and at 2 months he resumed sports (jogging and soccer) without complaints. Primary arthritis of the knee caused by Neisseria meningitidis is very rare...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28487566/the-invasive-neisseria-meningitidis-menc-cc103-from-brazil-is-characterized-by-an-accessory-gene-repertoire
#11
Michel Abanto Marin, Erica Fonseca, Fernando Encinas, Fernanda Freitas, Dhian Almeida Camargo, Roney Santos Coimbra, Ivano de Filippis, Ana Carolina Vicente
Neisseria meningitidis infections are a major issue for global health. The invasive MenC ST-103 clonal complex (CC103) has been the most prevalent in meningococcal outbreaks in Brazil, occurring also in several countries worldwide. Here we have analysed the population structure and accessory genome of MenC CC103 strains from a global perspective. An in-depth phylogenomic analysis revealed a lineage of N. meningitidis causing meningitis in Brazil and the United Kingdom. This lineage was also characterized as harbouring a particular accessory genome composed of CRISPR/Cas and restriction modification systems...
May 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28487398/transition-metals-at-the-host-pathogen-interface-how-neisseria-exploit-human-metalloproteins-for-acquiring-iron-and-zinc
#12
REVIEW
Wilma Neumann, Rose C Hadley, Elizabeth M Nolan
Transition metals are essential nutrients for all organisms and important players in the host-microbe interaction. During bacterial infection, a tug-of-war between the host and microbe for nutrient metals occurs: the host innate immune system responds to the pathogen by reducing metal availability and the pathogen tries to outmaneuver this response. The outcome of this competition, which involves metal-sequestering host-defense proteins and microbial metal acquisition machinery, is an important determinant for whether infection occurs...
May 9, 2017: Essays in Biochemistry
https://www.readbyqxmd.com/read/28483926/some-gram-negative-lipoproteins-keep-their-surface-topology-when-transplanted-from-one-species-to-another-and-deliver-foreign-polypeptides-to-the-bacterial-surface
#13
Laura Fantappiè, Carmela Irene, Micaela De Santis, Alessandro Armini, Assunta Gagliardi, Michele Tomasi, Matteo Parri, Valeria Cafardi, Serena Bonomi, Luisa Ganfini, Francesca Zerbini, Ilaria Zanella, Chiara Carnemolla, Luca Bini, Alberto Grandi, Guido Grandi
In Gram-negative bacteria, outer membrane-associated lipoproteins can either face the periplasm or protrude out of the bacterial surface. The mechanisms involved in lipoprotein transport through the outer membrane are not fully elucidated. Some lipoproteins reach the surface by using species-specific transport machinery. By contrast, a still poorly characterized group of lipoproteins appears to always cross the outer membrane, even when transplanted from one organism to another. To investigate such lipoproteins, we tested the expression and compartmentalization in E...
May 8, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28481980/large-cluster-of-neisseria-meningitidis-urethritis-in-columbus-ohio-2015
#14
Jose A Bazan, Abigail Norris Turner, Robert D Kirkcaldy, Adam C Retchless, Cecilia B Kretz, Elizabeth Briere, Yih-Ling Tzeng, David S Stephens, Courtney Maierhofer, Carlos Del Rio, A Jeanine Abrams, David L Trees, Melissa Ervin, Denisse B Licon, Karen S Fields, Mysheika Williams Roberts, Amanda Dennison, Xin Wang
Background.: Neisseria meningitidis (Nm) is a Gram-negative diplococcus that normally colonizes the nasopharynx and rarely infects the urogenital tract. On Gram stain of urethral exudates, Nm can be misidentified as the more common sexually transmitted pathogen Neisseria gonorrhoeae. Methods.: In response to a large increase in cases of Nm urethritis identified among men presenting for screening at a sexually transmitted disease clinic in Columbus, Ohio, we investigated the epidemiologic characteristics of men with Nm urethritis and the molecular and phylogenetic characteristics of their Nm isolates...
May 8, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28480349/complement-factor-p-is-a-ligand-for-the-natural-killer-cell-activating-receptor-nkp46
#15
Emilie Narni-Mancinelli, Laurent Gauthier, Myriam Baratin, Sophie Guia, Aurore Fenis, Ala-Eddine Deghmane, Benjamin Rossi, Patrick Fourquet, Bertrand Escalière, Yann M Kerdiles, Sophie Ugolini, Muhamed-Kheir Taha, Eric Vivier
Innate lymphoid cells (ILCs) are involved in immune responses to microbes and various stressed cells, such as tumor cells. They include group 1 [such as natural killer (NK) cells and ILC1], group 2, and group 3 ILCs. Besides their capacity to respond to cytokines, ILCs detect their targets through a series of cell surface-activating receptors recognizing microbial and nonmicrobial ligands. The nature of some of these ligands remains unclear, limiting our understanding of ILC biology. We focused on NKp46, which is highly conserved in mammals and expressed by all mature NK cells and subsets of ILC1 and ILC3...
April 28, 2017: Science Immunology
https://www.readbyqxmd.com/read/28478773/clinical-presentation-of-invasive-disease-caused-by-neisseria-meningitidis-serogroup-y-in-sweden-1995-to-2012
#16
O Säll, B Stenmark, M Glimåker, S Jacobsson, P Mölling, P Olcén, H Fredlund
Over the period 1995-2012, the incidence of invasive meningococcal disease (IMD) caused by Neisseria meningitidis serogroup Y (NmY) increased significantly in Sweden. This is mainly due to the emergence of a predominant cluster named strain type YI subtype 1, belonging to the ST-23 clonal complex (cc). The aim of this study was to examine the clinical picture of patients with invasive disease caused by NmY and to analyse whether the predominant cluster exhibits certain clinical characteristics that might explain the increased incidence...
May 8, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28465304/invasive-meningococcal-disease-in-the-veneto-region-of-italy-a-capture-recapture-analysis-for-assessing-the-effectiveness-of-an-integrated-surveillance-system
#17
Tatjana Baldovin, Roberta Lazzari, Silvia Cocchio, Patrizia Furlan, Chiara Bertoncello, Mario Saia, Francesca Russo, Vincenzo Baldo
BACKGROUND: Epidemiology of Neisseria meningitidis has been changing since the introduction of universal vaccination programmes against meningococcal serogroup C (MenC) and meningococcal serogroup B (MenB) has now become dominant. This study aimed to analyse the cases reported in institutional data recording systems to estimate the burden of invasive meningococcal diseases (IMDs) and assess the effectiveness of surveillance in Veneto region (Italy). METHODS: Analysis was performed from 2007 to 2014 on data recorded in different systems: Mandatory Notification System, National Surveillance of Invasive Bacterial Diseases System and Laboratories Surveillance System (LSS), which were pooled into a combined surveillance system (CSS) and hospital discharge records (HDRs)...
May 2, 2017: BMJ Open
https://www.readbyqxmd.com/read/28464987/utilizing-pharmacy-intervention-in-asplenic-patients-to-improve-vaccination-rates
#18
Lindsey Rihtarchik, Claire V Murphy, Kyle Porter, Lisa Mostafavifar
PURPOSE: Asplenic patients are at increased risk for post-splenectomy infection caused by Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae type B (Hib), and vaccination rates against these organisms remain low. The purpose of this study was to evaluate vaccination rates before and after implementation of a pharmacist-driven electronic vaccination tracking system. METHODS: This retrospective cohort analysis compared adult splenectomy patients before and after implementation of a pharmacist-driven tracking system with a primary outcome of complete initial vaccination...
April 24, 2017: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/28462458/crossreactivity-of-an-antiserum-directed-to-the-gram-negative-bacterium-neisseria-gonorrhoeae-with-the-snare-complex-protein-snap23-correlates-to-impaired-exocytosis-in-sh-sy5y-cells
#19
A Almamy, C Schwerk, H Schroten, H Ishikawa, A R Asif, B Reuss
Early maternal infections with Neisseria gonorrhoeae (NG) correlate to an increased lifetime schizophrenia risk for the offspring, which might be due to an immune-mediated mechanism. Here, we investigated the interactions of polyclonal antisera to NG (α-NG) with a first trimester prenatal brain multiprotein array, revealing among others the SNARE-complex protein Snap23 as a target antigen for α-NG. This interaction was confirmed by Western blot analysis with a recombinant Snap23 protein, whereas the closely related Snap25 failed to interact with α-NG...
May 1, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28460613/novel-information-about-neisseria-meningitides-identification-of-the-most-important-type-ii-toxin-antitoxin-systems
#20
Abbas Maleki, Sobhan Ghafourian, Behzad Badakhsh, Iraj Pakzad, Nourkhoda Sadeghifard
BACKGROUND: Toxin antitoxin systems is the one of the important elements among pathogenic bacteria ‎which have proven roles such as biofilm formation, cell programed death and persister cells formation‎. Neisseria meningitidis due to create of serious diseases in humans must be highlighted. OBJECTIVE: The current study aimed to identify of mazEF and relBE TA systems in N. meningitidis. METHOD: The potential TA loci were searched in database by bioinformatics analysis and then, experimental analysis was performed by PCR assay...
April 27, 2017: Infectious Disorders Drug Targets
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