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https://www.readbyqxmd.com/read/28916651/escherichia-coli-and-neisseria-gonorrhoeae-uvrd-helicase-unwinds-g4-dna-structures
#1
Kaustubh Shukla, Roshan Thakur, Debayan Ganguli, Desirazu Rao, Ganesh Nagaraju
G-quadruplex (G4) secondary structures have been implicated in various biological processes including gene expression, DNA replication and telomere maintenance. However, unresolved G4 structures impede replication progression which can lead to generation of DNA double-strand breaks and genome instability. Helicases have been shown to resolve G4 structures to facilitate faithful duplication of the genome. Escherichia coli UvrD (EcUvrD) helicase plays a crucial role in nucleotide excision repair, mismatch repair and in the regulation of homologous recombination...
September 15, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28916450/capsule-switching-of-neisseria-meningitidis-sequence-type-7-serogroup-a-to-serogroup-x
#2
Xuemeng Ji, Ping-Ping Yao, Le-Yi Zhang, Yi Li, Fang Xu, Ling-Ling Mei, Shui-Rong Zhu, Yan-Jun Zhang, Han-Ping Zhu, Stijn van der Veen
OBJECTIVES: The bacterial pathogen Neisseria meningitidis is able to escape the currently available capsule-based vaccines by undergoing capsule switching. In this study, we investigated whether capsule switching has occurred in a recently emerged sequence type (ST) 7 serogroup X isolate in China, for which currently no vaccine is available. METHODS: To identify capsule switching breakpoints, the capsule locus and flanking regions of the ST-7 serogroup X isolate and three endemic ST-7 serogroup A isolates were sequenced and compared...
September 12, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28915816/cramp-deficiency-leads-to-a-pro-inflammatory-phenotype-and-impaired-phagocytosis-after-exposure-to-bacterial-meningitis-pathogens
#3
Eugenia Kress, Julika Merres, Lea-Jessica Albrecht, Sven Hammerschmidt, Thomas Pufe, Simone C Tauber, Lars-Ove Brandenburg
BACKGROUND: Antimicrobial peptides are important components of the host defence with a broad range of functions including direct antimicrobial activity and modulation of inflammation. Lack of cathelin-related antimicrobial peptide (CRAMP) was associated with higher mortality and bacterial burden and impaired neutrophil granulocyte infiltration in a model of pneumococcal meningitis. The present study was designed to characterize the effects of CRAMP deficiency on glial response and phagocytosis after exposure to bacterial stimuli...
September 16, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/28911029/necrotizing-fasciitis-caused-by-genogroup-%C3%A3-neisseria-meningitidis
#4
V Moris, A Chapuis, D Guillier, G Jeudy, M Huther, N Auffret, L Piroth, M Blot
No abstract text is available yet for this article.
September 1, 2017: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/28910265/kiss-and-tell-limited-empirical-data-on-oropharyngeal-neisseria-gonorrhoeae-among-men-who-have-sex-with-men-and-implications-for-modeling
#5
Kyle T Bernstein, Harrell Chesson, Robert D Kirkcaldy, Julia L Marcus, Thomas L Gift, Sevgi O Aral
No abstract text is available yet for this article.
October 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28904860/regulation-of-neisseria-meningitidis-cytochrome-bc1-components-by-nrrf-a-fur-controlled-small-noncoding-rna
#6
Yvonne Pannekoek, Robert Huis In 't Veld, Kim Schipper, Sandra Bovenkerk, Gertjan Kramer, Dave Speijer, Arie van der Ende
NrrF is a small regulatory RNA of the human pathogen Neisseria meningitidis. NrrF was previously shown to repress succinate dehydrogenase (sdhCDAB) under control of the ferric uptake regulator (Fur). Here, we provide evidence that cytochrome bc1 , encoded by the polycistronic mRNA petABC, is a NrrF target as well. We demonstrated differential expression of cytochrome bc1 comparing wild-type meningococci and meningococci expressing NrrF when sufficient iron is available. Using a gfp-reporter system monitoring translational control and target recognition of sRNA in Escherichia coli, we show that interaction between NrrF and the 5' untranslated region of the petABC mRNA results in its repression...
September 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28904692/evaluation-of-bacterial-meningitis-surveillance-data-of-the-northern-region-ghana-2010-2015
#7
Basil Benduri Kaburi, Chrysantus Kubio, Ernest Kenu, Donne Kofi Ameme, Jacob Yakubu Mahama, Samuel Oko Sackey, Edwin Andrew Afari
INTRODUCTION: Bacterial meningitis is a disease of major public health importance especially for countries such as Ghana; whose northern part lies within the meningitis belt. The Northern region of Ghana has been recording cases with outbreaks over the years. In order to generate evidence to improve surveillance, we described the epidemiology of bacterial meningitis using surveillance data of the northern region. METHODS: Bacterial meningitis datasets from January 2010 to December 2015 for all the 26 districts of the Northern region were retrieved from line lists...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28904187/genomic-characterization-of-urethritis-associated-neisseria-meningitidis-shows-that-a-wide-range-of-n-meningitidis-strains-can-cause-urethritis
#8
Kevin C Ma, Magnus Unemo, Samo Jeverica, Robert D Kirkcaldy, Hideyuki Takahashi, Makoto Ohnishi, Yonatan H Grad
Neisseria meningitidis, typically a resident of the oro- or nasopharynx and the causative agent of meningococcal meningitis and meningococcemia, is capable of invading and colonizing the urogenital tract. This can result in urethritis, akin to the syndrome caused by its sister species N. gonorrhoeae, the etiologic agent of gonorrhea. Recently, meningococcal strains associated with outbreaks of urethritis were reported to share genetic characteristics with gonococcus, raising the question of the extent to which these strains contain features that promote adaptation to the genitourinary niche, making them gonococcal-like and distinguishing them from other N...
September 13, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28899333/invasive-em-neisseria-gonorrhoeae-em-producing-pre-septal-cellulitis-and-keratoconjunctivitis-diagnosis-and-management
#9
Shivesh Varma, Nathan Wong, Jwu Jin Khong
No abstract text is available yet for this article.
September 18, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28899315/australian-meningococcal-surveillance-programme-1-january-to-31-march-2017
#10
Monica M Lahra
No abstract text is available yet for this article.
June 30, 2017: Communicable Diseases Intelligence Quarterly Report
https://www.readbyqxmd.com/read/28894691/gonococcal-prosthetic-joint-infection
#11
Ian Gassiep, Bradley Gilpin, Joel Douglas, David Siebert
Neisseria gonorrhoea is a common sexually transmitted infection worldwide. Disseminated gonococcal infection is an infrequent presentation and rarely can be associated with septic arthritis. Incidence of this infection is rising, both internationally and in older age groups. We present the first documented case of N. gonorrhoea prosthetic joint infection which was successfully treated with laparoscopic debridement and antimicrobial therapy.
2017: Journal of bone and joint infection
https://www.readbyqxmd.com/read/28893785/in-vitro-activity-of-the-novel-pleuromutilin-lefamulin-bc-3781-and-effect-of-efflux-pump-inactivation-on-multidrug-resistant-and-extensively-drug-resistant-neisseria-gonorrhoeae
#12
Susanne Jacobsson, Susanne Paukner, Daniel Golparian, Jörgen S Jensen, Magnus Unemo
We evaluated the activity of the novel semi-synthetic pleuromutilin lefamulin, inhibiting protein synthesis and growth, and effect of efflux pump inactivation on clinical gonococcal isolates and reference strains (n=251), including numerous multidrug-resistant and extensively-drug resistant isolates. Lefamulin showed potent activity against all gonococcal isolates and no significant cross-resistance to other antimicrobials was identified. Further studies of lefamulin are warranted, including in-vitro selection and mechanisms of resistance, pharmacokinetics/pharmacodynamics, optimal dosing, and performance in randomized controlled trials...
September 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28893203/overall-low-extended-spectrum-cephalosporin-resistance-but-high-azithromycin-resistance-in-neisseria-gonorrhoeae-in-24-european-countries-2015
#13
Michelle J Cole, Gianfranco Spiteri, Susanne Jacobsson, Neil Woodford, Francesco Tripodo, Andrew J Amato-Gauci, Magnus Unemo
BACKGROUND: Surveillance of Neisseria gonorrhoeae antimicrobial susceptibility in Europe is performed through the European Gonococcal Antimicrobial Surveillance Programme (Euro-GASP), which additionally provides data to inform the European gonorrhoea treatment guideline; currently recommending ceftriaxone 500 mg plus azithromycin 2 g as first-line therapy. We present antimicrobial susceptibility data from 24 European countries in 2015, linked to epidemiological data of patients, and compare the results to Euro-GASP data from previous years...
September 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28893183/antimicrobial-resistance-in-africa-a-systematic-review
#14
Birkneh Tilahun Tadesse, Elizabeth A Ashley, Stefano Ongarello, Joshua Havumaki, Miranga Wijegoonewardena, Iveth J González, Sabine Dittrich
BACKGROUND: Antimicrobial resistance (AMR) is widely acknowledged as a global problem, yet in many parts of the world its magnitude is still not well understood. This review, using a public health focused approach, aimed to understand and describe the current status of AMR in Africa in relation to common causes of infections and drugs recommended in WHO treatment guidelines. METHODS: PubMed, EMBASE and other relevant databases were searched for recent articles (2013-2016) in accordance with the PRISMA guidelines...
September 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28892991/neisseria-meningitidis-causing-multiple-cerebral-abscesses-in-early-neonatal-period-case-report-and-review-of-literature
#15
Laxman Basani, Roja Aepala
Neisseria meningitidis is a rare cause of meningitis and septicemia in neonates. There are few published case reports of neonatal meningococcal meningitis complicated by subdural empyema, cerebral abscess and hydrocephalus. Few cases of neonatal meningococcal meningitis have been reported in the literature with none of them having the complication of multiple cerebral abscesses in early neonatal period (<seven days of life). We report a case of meningococcal meningitis with multiple cerebral abscesses which presented on fifth day of life and developed hydrocephalus at five weeks of life requiring a Ventriculo Peritoneal (VP) shunt...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28886683/neisseria-gonorrhoeae-drug-resistance-mouse-models-and-vaccine-development
#16
Peter A Rice, William M Shafer, Sanjay Ram, Ann E Jerse
Gonorrhea, an obligate human infection, is on the rise worldwide and gonococcal strains resistant to many antibiotics are emerging. Appropriate antimicrobial treatment and prevention, including effective vaccines, are urgently needed. To guide investigation, an experimental model of genital tract infection has been developed in female mice to study mechanisms by which Neisseria gonorrhoeae evades host-derived antimicrobial factors and to identify protective and immunosuppressive pathways. Refinements of the animal model have also improved its use as a surrogate host of human infection and accelerated the testing of novel therapeutic and prophylactic compounds against gonococcal infection...
September 8, 2017: Annual Review of Microbiology
https://www.readbyqxmd.com/read/28886618/bcl10-synergistically-links-ceacam3-and-tlr-dependent-inflammatory-signalling
#17
Anna Sintsova, Cynthia X Guo, Helen Sarantis, Tak W Mak, Michael Glogauer, Scott D Gray-Owen
The neutrophil-specific innate immune receptor CEACAM3 functions as a decoy to capture Gram-negative pathogens, such as Neisseria gonorrhoeae, that exploit CEACAM family members to adhere to the epithelium. Bacterial binding to CEACAM3 results in their efficient engulfment and triggers activation of an NF-κB-dependent inflammatory response by human neutrophils. Herein, we report that CEACAM3 cross-linking is not sufficient for induction of cytokine production, and show that the inflammatory response induced by N...
September 8, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28881886/monitoring-sputum-culture-in-resected-esophageal-cancer-patients-with-preoperative-treatment
#18
K Kosumi, Y Baba, K Yamashita, T Ishimoto, K Nakamura, M Ohuchi, Y Kiyozumi, D Izumi, R Tokunaga, K Harada, H Shigaki, J Kurashige, M Iwatsuki, Y Sakamoto, N Yoshida, M Watanabe, H Baba
Pneumonia is a major cause of postesophagectomy mortality and worsens the long-term survival in resected esophageal cancer patients. Moreover, preoperative treatments such as chemotherapy or chemoradiotherapy (which have recently been applied worldwide) might affect the bacterial flora of the sputum. To investigate the association among preoperative treatments, the bacterial flora of sputum, and the clinical and pathological features in resected esophageal cancer patients, this study newly investigates the effect of preoperative treatments on the bacterial flora of sputum...
December 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28877506/cryoelectron-microscopy-reconstructions-of-the-pseudomonas-aeruginosa-and-neisseria-gonorrhoeae-type-iv-pili-at-sub-nanometer-resolution
#19
Fengbin Wang, Mathieu Coureuil, Tomasz Osinski, Albina Orlova, Tuba Altindal, Gaël Gesbert, Xavier Nassif, Edward H Egelman, Lisa Craig
We report here cryoelectron microscopy reconstructions of type IV pili (T4P) from two important human pathogens, Pseudomonas aeruginosa and Neisseria gonorrhoeae, at ∼ 8 and 5 Å resolution, respectively. The two structures reveal distinct arrangements of the pilin globular domains on the pilus surfaces, which impart different helical parameters, but similar packing of the conserved N-terminal α helices, α1, in the filament core. In contrast to the continuous α helix seen in the X-ray crystal structures of the P...
September 5, 2017: Structure
https://www.readbyqxmd.com/read/28876312/screening-for-sexually-transmitted-infections-in-adolescent-girls-and-young-women-in-mombasa-kenya-feasibility-prevalence-and-correlates
#20
Linnet N Masese, George Wanje, Emmanuel Kabare, Valentine Budambula, Francis Mutuku, Grace Omoni, Anisa Baghazal, Barbra A Richardson, R Scott McClelland
INTRODUCTION: As adolescents and young women become sexually active, they are at risk of adverse reproductive health outcomes including sexually transmitted infections (STIs). We assessed feasibility and acceptability of STI screening among 15- to 24-year-old women in Mombasa, Kenya. METHODS: After sensitization activities, participants were recruited from 3 high schools and 1 university. Study staff conducted informational sessions. Students interested in participating were given consent forms to take home, and invited to visit our clinic for STI screening...
June 28, 2017: Sexually Transmitted Diseases
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