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https://www.readbyqxmd.com/read/28339597/compositional-differences-in-multi-species-biofilms-formed-on-various-orthodontic-adhesives
#1
Jung-Sub An, Kyungsun Kim, Soha Cho, Bum-Soon Lim, Sug-Joon Ahn
Objectives: To investigate the aspects of multi-species biofilm formation on various orthodontic adhesives with different surface characteristics. Methods: Multi-species biofilms using 13 bacterial species were grown on the surfaces of composite, compomer, and resin-modified glass-ionomer cement (RMGI). The changes in Streptococcus mutans (Sm), Streptococcus sobrinus (Ss), Porphyromonas gingivalis (Pg), Aggregatibacter actinomycetemcomitans (Aa), and total bacteria were determined at day 1 (T1) and day 4 (T2) using real-time polymerase chain reaction...
January 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28339360/critical-role-of-stir-mri-in-early-detection-of-post-streptococcal-periostitis-with-dysproteinaemia-goldbloom-s-syndrome
#2
Riccardo Papa, Alessandro Consolaro, Francesca Minoia, Roberta Caorsi, Gianmichele Magnano, Marco Gattorno, Angelo Ravelli, Paolo Picco
OBJECTIVES: In 1966, Goldbloom et al. described two children who developed a peculiar clinical picture characterized by intermittent daily bone pain in the lower limbs, fever spikes, increased acute phase reactants and dysproteinaemia. The syndrome occurred two weeks after a group A β-haemolytic streptococcus infection. So far, only a few cases have been reported in the medical literature in English. METHODS: We report two further cases of Goldbloom's syndrome with a review of the literature in English...
March 23, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28335406/factors-that-negatively-affect-the-prognosis-of-pediatric-community-acquired-pneumonia-in-district-hospital-in-tanzania
#3
Serena Caggiano, Nicola Ullmann, Elisa De Vitis, Marzia Trivelli, Chiara Mariani, Maria Podagrosi, Fabiana Ursitti, Chiara Bertolaso, Carolina Putotto, Marta Unolt, Andrea Pietravalle, Paola Pansa, Kajoro Mphayokulela, Maria Incoronata Lemmo, Michael Mkwambe, Joseph Kazaura, Marzia Duse, Francesco Nieddu, Chiara Azzari, Renato Cutrera
Community-acquired pneumonia (CAP) is still the most important cause of death in countries with scarce resources. All children (33 months ± 35 DS) discharged from the Pediatric Unit of Itigi Hospital, Tanzania, with a diagnosis of CAP from August 2014 to April 2015 were enrolled. Clinical data were gathered. Dried blood spot (DBS) samples for quantitative real-time polymerase chain reaction (PCR) for bacterial detection were collected in all 100 children included. Twenty-four percent of patients were identified with severe CAP and 11% died...
March 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335307/zinc-oxide-nanorods-decorated-graphene-nanoplatelets-a-promising-antimicrobial-agent-against-the-cariogenic-bacterium-streptococcus-mutans
#4
Elena Zanni, Chandrakanth Reddy Chandraiahgari, Giovanni De Bellis, Maria Rita Montereali, Giovanna Armiento, Paolo Ballirano, Antonella Polimeni, Maria Sabrina Sarto, Daniela Uccelletti
Nanomaterials are revolutionizing the field of medicine to improve the quality of life due to the myriad of applications stemming from their unique properties, including the antimicrobial activity against pathogens. In this study, the antimicrobial and antibiofilm properties of a novel nanomaterial composed by zinc oxide nanorods-decorated graphene nanoplatelets (ZNGs) are investigated. ZNGs were produced by hydrothermal method and characterized through field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) techniques...
September 29, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335264/antimicrobial-properties-of-biofunctionalized-silver-nanoparticles-on-clinical-isolates-of-streptococcus-mutans-and-its-serotypes
#5
Ángel Manuel Martínez-Robles, Juan Pablo Loyola-Rodríguez, Norma Verónica Zavala-Alonso, Rita Elizabeth Martinez-Martinez, Facundo Ruiz, René Homero Lara-Castro, Alejandro Donohué-Cornejo, Simón Yobanny Reyes-López, León Francisco Espinosa-Cristóbal
(1) Background: Streptococcus mutans (S. mutans) is the principal pathogen involved in the formation of dental caries. Other systemic diseases have also been associated with specific S. mutans serotypes (c, e, f, and k). Silver nanoparticles (SNP) have been demonstrated to have good antibacterial effects against S. mutans; therefore, limited studies have evaluated the antimicrobial activity of biofunctionalized SNP on S. mutans serotypes. The purpose of this work was to prepare and characterize coated SNP using two different organic components and to evaluate the antimicrobial activity of SNP in clinical isolates of S...
July 22, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335189/synergistic-antibacterial-effects-of-nanoparticles-encapsulated-with-scutellaria-baicalensis-and-pure-chlorhexidine-on-oral-bacterial-biofilms
#6
Ken Cham-Fai Leung, Chaminda Jayampath Seneviratne, Xuan Li, Ping Chung Leung, Clara Bik San Lau, Chi-Hin Wong, Ka Yan Pang, Chun Wai Wong, Elaine Wat, Lijian Jin
Scutellariabaicalensis (SB) is a traditional Chinese medicine for treating infectious and inflammatory diseases. Our recent study shows potent antibacterial effects of nanoparticle-encapsulated chlorhexidine (Nano-CHX). Herein, we explored the synergistic effects of the nanoparticle-encapsulated SB (Nano-SB) and Nano-CHX on oral bacterial biofilms. Loading efficiency of Nano-SB was determined by thermogravimetric analysis, and its releasing profile was assessed by high-performance liquid chromatographyusing baicalin (a flavonoid compound of SB) as the marker...
April 7, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333608/morbidity-in-pregnant-women-associated-with-unverified-penicillin-allergies-antibiotic-use-and-group-b-streptococcus-infections
#7
Shilpa H Desai, Michael S Kaplan, Qiaoling Chen, Eric M Macy
CONTEXT: The morbidity potentially associated with unverified penicillin allergy in pregnant women, with and without group B streptococcus (GBS) infections, is unknown. Penicillin allergy testing is safe during pregnancy but is done infrequently. OBJECTIVE: To determine morbidity associated with antibiotic use in a large cohort of pregnant women, with and without an unverified history of penicillin allergy, and with and without GBS. DESIGN: Retrospective...
2017: Permanente Journal
https://www.readbyqxmd.com/read/28333320/cross-resistance-to-lincosamides-streptogramins-a-and-pleuromutilins-in-streptococcus-agalactiae-isolates-from-the-usa
#8
Paulina A Hawkins, Caitlin S Law, Benjamin J Metcalf, Sopio Chochua, Delois M Jackson, Lars F Westblade, Robert Jerris, Bernard W Beall, Lesley McGee
Background: Streptococcus agalactiae (Group B Streptococcus, GBS) is a leading cause of meningitis, sepsis and pneumonia in neonates in the United States. GBS also causes invasive disease in older infants, pregnant women, children and young adults with underlying medical conditions, and older adults. Resistance to lincosamides in the absence of erythromycin resistance is rare in GBS, but has been previously reported in clinical isolates, both on its own or in combination with resistance to streptogramins A and pleuromutilins (L/LSA/LSAP phenotypes)...
March 13, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28333198/a-tetracycline-inducible-integrative-expression-system-for-streptococcus-pneumoniae
#9
Marina Meiers, Anke Laux, Daniela Eichinger, Anne Sexauer, Patrick Marx, Ralph Bertram, Reinhold Brückner
Inducible gene expression systems are very useful to analyze cellular processes. The ability to switch the expression state of genes of interest may even be crucial if essential traits or genetic instability are involved. An integrative plasmid, pTEX2, was designed using the (anhydro)tetracycline-inducible promoter Pxyl/tet from staphylococcal plasmid pRAB11 to control gene expression in Streptococcus pneumoniae. The system was evaluated by expressing genes of the two-component regulatory system ciaRH of S...
February 21, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28332290/inductors-and-regulatory-properties-of-the-genomic-island-associated-fru2-metabolic-operon-of-streptococcus-agalactiae
#10
K Patron, P Gilot, V Rong, A Hiron, L Mereghetti, E Camiade
No abstract text is available yet for this article.
April 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28332027/erratum-to-identification-of-some-main-streptococcus-iniae-associated-proteins-relationship
#11
Fatima El Aamri, José Ángel Guillén, Daniel Padilla, Jimena Bravo, Belinda Vega, Félix Acosta, Fernando Real
No abstract text is available yet for this article.
March 22, 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28331908/il-1%C3%AE-is-an-innate-immune-sensor-of-microbial-proteolysis
#12
Christopher N LaRock, Jordan Todd, Doris L LaRock, Joshua Olson, Anthony J O'Donoghue, Avril A B Robertson, Matthew A Cooper, Hal M Hoffman, Victor Nizet
Interleukin-1β (IL-1β) is a key proinflammatory cytokine that drives antimicrobial immune responses. IL-1β is aberrantly activated in autoimmune diseases, and IL-1β inhibitors are used as therapeutic agents to treat patients with certain autoimmune disorders. Review of postmarketing surveillance of patients receiving IL-1β inhibitors found a disproportionate reporting of invasive infections by group A Streptococcus (GAS). IL-1β inhibition increased mouse susceptibility to GAS infection, but IL-1β was produced independent of canonical inflammasomes...
August 2016: Science Immunology
https://www.readbyqxmd.com/read/28331804/infected-ascites-distinguishing-secondary-peritonitis-from-spontaneous-bacterial-peritonitis-in-a-cirrhotic-patient-with-classic-symptoms
#13
Marvin Louis Roy Lu, Akanksha Agarwal, Josh Sloan, Aaron Kosmin
INTRODUCTION: Spontaneous bacterial peritonitis can be differentiated from secondary bacterial peritonitis by the absence of a surgically treatable intra-abdominal source of infection. However, oftentimes this is unapparent and other clinical clues need to be sought after to make the right diagnosis. CASE: A 64-year-old woman was admitted because of three days of worsening diffuse abdominal pain and distention. She was morbidly obese and had a history of non-alcoholic steatohepatitis (NASH) cirrhosis...
2017: IDCases
https://www.readbyqxmd.com/read/28330893/analysis-of-mic-and-disk-diffusion-testing-variables-for-gepotidacin-and-comparator-agents-against-select-bacterial-pathogens
#14
L K Koeth, J M DiFranco-Fisher, N E Scangarella-Oman, L A Miller
This study was conducted to determine the effect of testing parameters on the in vitro activity of gepotidacin, a new triazaacenaphthylene antibacterial agent for the treatment of conventional and biothreat pathogens. CLSI methods, and variations of these methods were used to test 10 Staphylococcus aureus, 10 Streptococcus pneumoniae, 10 Haemophilus influenzae, and 5 Escherichia coli by MIC and 30 S. aureus, 15 S. pneumoniae and 15 S. pyogenes by disk diffusion (DD) methods. Levofloxacin and linezolid were tested as comparator agents for MIC and DD methods, respectively...
March 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28330602/the-pneumococcal-alpha-glycerophosphate-oxidase-enhances-nasopharyngeal-colonization-through-binding-to-host-glycoconjugates
#15
Layla K Mahdi, Melanie A Higgins, Christopher J Day, Joe Tiralongo, Lauren E Hartley-Tassell, Michael P Jennings, David L Gordon, Adrienne W Paton, James C Paton, Abiodun D Ogunniyi
Streptococcus pneumoniae (the pneumococcus) is a major human pathogen, causing a broad spectrum of diseases including otitis media, pneumonia, bacteraemia and meningitis. Here we examined the role of a potential pneumococcal meningitis vaccine antigen, alpha-glycerophosphate oxidase (SpGlpO), in nasopharyngeal colonization. We found that serotype 4 and serotype 6A strains deficient in SpGlpO have significantly reduced capacity to colonize the nasopharynx of mice, and were significantly defective in adherence to human nasopharyngeal carcinoma cells in vitro...
March 3, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28330466/the-nasopharyngeal-microbiota-of-beef-cattle-before-and-after-transport-to-a-feedlot
#16
Devin B Holman, Edouard Timsit, Samat Amat, D Wade Abbott, Andre G Buret, Trevor W Alexander
BACKGROUND: The nasopharyngeal (NP) microbiota plays an important role in bovine health, comprising a rich and diverse microbial community. The nasopharynx is also the niche for potentially pathogenic agents which are associated with bovine respiratory disease (BRD), a serious and costly illness in feedlot cattle. We used 14 beef heifers from a closed and disease-free herd to assess the dynamics of the NP microbiota of cattle that are transported to a feedlot. Cattle were sampled prior to transport to the feedlot (day 0) and at days 2, 7, and 14...
March 22, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28330265/isolation-and-characterization-of-plant-synergistic-bacteria-capable-of-degrading-xenobiotics-from-oil-spillage-sites
#17
Indranil De, Sarika Gupta
Oil spillage sites primarily contain various types of hydrocarbons, such as linear chain, polycyclic, and aromatic compounds, posing several detrimental effects on plants. Results from our previous study showed an alteration of various metabolomic parameters, indirectly resulting in an observable decline of growth in the mung seedlings upon incubation with phenol, toluene, xylene, and hexane. This study evaluates the role of these compounds upon plant growth and focusses to mitigate the effect of the same, using some isolated plant synergistic bacteria...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330238/isolation-of-antimicrobial-resistant-bacteria-in-upper-respiratory-tract-infections-of-patients
#18
Li-Min Wang, Xiao-Liang Qiao, Liang Ai, Jing-Jing Zhai, Xue-Xia Wang
Haemophilus influenzae, Streptococcus pyogenes, Moraxella catarrhalis, Staphylococcus aureus, and Streptococcus pneumoniae are usual cause of upper respiratory tract infection cases. The present study aims the isolation of bacterial strains which are resistant to the commonly prescribed antibiotics. In total, 900 throat swabs were obtained from the patients suffering from upper respiratory tract infections residing in three different localities. The maximum number of isolates (64 %) were obtained from locality-1 (L-1), whereas lowest isolates were found in second locality (L-2)...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330230/isolation-and-biological-evaluation-of-n-4-aminocyclooctyl-3-5-dinitrobenzamide-a-new-semisynthetic-derivative-from-the-mangrove-associated-actinomycete-pseudonocardia-endophytica-vuk-10
#19
Usha Kiranmayi Mangamuri, Muvva Vijayalakshmi, Sudhakar Poda, Bramanandam Manavathi, Bhujangarao Chitturi, Venkateswarlu Yenamandra
The present study was aimed to isolate novel bioactive compounds from actinomycetes species isolated from mangrove habitats. With this connection, Pseudonocardia endophytica (VUK-10) was isolated using dilution plate technique and was examined for its secondary metabolite profiling. After successive purification and spectroscopic characterization viz., FTIR, mass, NMR, DEPT, HMQC, HMBC, and COSY spectroscopy, two compounds were identified including a semi synthetic derivative N-(4-aminocyclooctyl)-3, 5-dinitrobenzamide (1), obtained from the precursor of novel natural product cyclooctane-1,4-diamine (3), along with a known compound 3-((1H-indol-6-yl) methyl) hexahydropyrrolo [1, 2-a] pyrazine-1, 4-dione (2)...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28328284/non-encapsulated-streptococcus-pneumoniae-vaccination-as-a-measure-to-interfere-with-horizontal-gene-transfer
#20
J D Langereis, M I de Jonge
No abstract text is available yet for this article.
March 22, 2017: Virulence
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