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Group a streptococcus

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https://www.readbyqxmd.com/read/29232664/vaccination-practices-in-pediatric-dialysis-patients-across-europe-a-european-pediatric-dialysis-working-group-and-european-society-for-pediatric-nephrology-dialysis-working-group-study
#1
Sevcan A Bakkaloğlu, Yesim Özdemir Atikel, Fabio Paglialonga, Constantinos J Stefanidis, Varvara Askiti, Enrico Vidal, Gema Ariceta, Engin Melek, Enrico Verrina, Nikoleta Printza, Karel Vondrak, Aleksandra Zurowska, Ilona Zagozdzon, Mesiha Ekim, Elif Nursel Özmert, Stephanie Dufek, Augustina Jankauskiene, Claus Peter Schmitt, Eszter Lévai, Johan Vande Walle, Nur Canpolat, Tuula Holtta, Michel Fischbach, Guenter Klaus, Christoph Aufricht, Rukshana Shroff, Alberto Edefonti
BACKGROUND: Data on the immunization practices in pediatric chronic kidney disease (CKD) patients are scarce. The purpose of this study was to evaluate current vaccination practices for children on dialysis across European pediatric nephrology centers. METHODS: A total of 18 tertiary pediatric nephrology centers from 12 European countries were included in the study. The data on universal national immunization programs and immunization practices for children with chronic disease or risk were recorded from European Center for Disease Prevention and Control and the World Health Organization...
December 12, 2017: Nephron
https://www.readbyqxmd.com/read/29232586/synthesis-and-biological-evaluation-of-coumarin-derivatives-containing-imidazole-skeleton-as-potential-antibacterial-agents
#2
Yang Hu, Yufeng Shen, Xiaohu Wu, Xiao Tu, Gao-Xue Wang
Emergence of multidrug-resistant bacteria causes an urgent need for new generation of antibiotics, which may have a different mechanism of inhibition or killing action from the existing. Here, we report on the design, synthesis, and biological evaluation of thirty-nine coumarin derivatives in order to solve the antibacterial resistance by targeting at the inhibition of biosynthesis pathway of fatty acids. Their antibacterial activities against Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae, and Flavobacterium cloumnare are tested and action mechanism against the key enzyme in bacterial fatty acid synthesis pathway are studied...
December 5, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29228609/bacteriome-and-mycobiome-associations-in-oral-tongue-cancer
#3
Pranab K Mukherjee, Hannah Wang, Mauricio Retuerto, Huan Zhang, Brian Burkey, Mahmoud A Ghannoum, Charis Eng
Squamous cell carcinoma of the oral (mobile) tongue (OMTC), a non-human papilloma virus-associated oral cancer, is rapidly increasing without clear etiology. Poor oral hygiene has been associated with oral cancers, suggesting that oral bacteriome (bacterial community) and mycobiome (fungal community) could play a role. While the bacteriome is increasingly recognized as an active participant in health, the role of the mycobiome has not been studied in OMTC. Tissue DNA was extracted from 39 paired tumor and adjacent normal tissues from patients with OMTC...
November 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228173/group-a-streptococcal-m-like-proteins-from-pathogenesis-to-vaccine-potential
#4
Hannah Frost, Martina Sanderson-Smith, Mark Walker, Anne Botteaux, Pierre Smeesters
M and M-like surface proteins from Group A Streptococcus (GAS) act as virulence factors and have been used in multiple vaccine candidates. While the M protein has been extensively studied, the two genetically and functionally related M-like proteins, Mrp and Enn, although present in most streptococcal strains have been relatively less characterized. We compile the current state of knowledge for these two proteins, from discovery to recent studies on function and immunogenicity, using the M protein for comparison as a prototype of this family of proteins...
December 7, 2017: FEMS Microbiology Reviews
https://www.readbyqxmd.com/read/29226710/group-a-streptococcus-encounters-with-host-macrophages
#5
J Andrés Valderrama, Victor Nizet
Group A Streptococcus (GAS) is a leading human bacterial pathogen with diverse clinical manifestations. Macrophages constitute a critical first line of host defense against GAS infection, using numerous surface and intracellular receptors such as Toll-like receptors and inflammasomes for pathogen recognition and activation of inflammatory signaling pathways. Depending on the intensity of the GAS infection, activation of these signaling cascades may provide a beneficial early alarm for effective immune clearance, or conversely, may cause hyperinflammation and tissue injury during severe invasive infection...
December 11, 2017: Future Microbiology
https://www.readbyqxmd.com/read/29225074/the-effect-of-fish-gender-on-susceptibility-to-acute-streptococcus-agalactiae-infection-in-javanese-medaka-oryzias-javanicus
#6
M N A Amal, S T Zarif, M Suhaiba, M R M Aidil, N N Shaqinah, M Zamri-Saad, A Ismail
This study describes the susceptibility of different fish gender following acute Streptococcus agalactiae infection by using Javanese medaka Oryzias javanicus as test fish. The fish were grouped into four groups, which were: (1) all-male; (2) all-female; (3) mixed-gender (1 male: 1 female ratio); and (4) control non-infected (1 male: 1 female ratio). The fish in group 1, 2 and 3 were intraperitoneally exposed to 5.4 × 108 CFU/ml of S. agalactiae, while for group 4, the fish were exposed using sterile broth...
December 4, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29223920/streptococcus-agalactiae-bacteremia-in-non-pregnant-adult-patients-at-two-teaching-hospitals
#7
Emanuel J Saad, Diego F Baenas, Cecilia S Boisseau, Mercedes J García, Silvana A Núñez, Pablo E Sanchez, Domingo C Balderramo, Daniela Hernández, Juan P Caeiro
Streptococcus agalactiae or group B streptococcus (GBS) is a frequent pathogen in immunocompromised adults. The aim of this study was to determine the relative frequency, clinical presentation, antimicrobial susceptibility profile, and risk factors associated with GBS bacteremia in non-pregnant adult patients. We conducted a retrospective analysis of blood cultures performed in two hospitals between the years 2009-2013. From 1110 bacteremia episodes, 13 were caused by GBS, all of which were susceptible to ampicillin...
December 6, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/29221986/streptococcus-pneumoniae-two-component-regulatory-systems-the-interplay-of-the-pneumococcus-with-its-environment
#8
REVIEW
Alejandro Gómez-Mejia, Gustavo Gámez, Sven Hammerschmidt
Streptococcus pneumoniae is a human pathobiont possessing a diverse array of multifunctional proteins essential for bacterial fitness and virulence. Gene expression is tightly controlled by regulatory components and among the pneumococcal sensorial tools, two‑component regulatory systems (TCS) are the most widespread and conserved. This review aims to provide a comprehensive analysis of original studies on pneumococcal TCS on a functional level. Despite a rather chaotic nomenclature, the current available information on pneumococcal regulation by these systems can be conveniently addressed, according to the regulation of pathophysiological cell processes and the responses to detectable environmental signals...
November 26, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/29219259/nursing-management-of-childhood-chickenpox-infection
#9
Grace Boyd, Paul Anthony Heaton, Rachel Wilkinson, Siba Prosad Paul
Chickenpox is an extremely contagious infectious disease caused by varicella zoster virus (VZV). It is a common childhood illness characterised by an itchy vesicular rash and fever, which usually resolves spontaneously without medical intervention. Serious, and rarely fatal, complications can occur, including pneumonia, central nervous system infection, overwhelming secondary bacterial infections, especially with Group A streptococcus, and necrotising fasciitis. Therefore it is crucial that emergency department (ED) nurses can recognise the signs and symptoms that indicate deterioration...
December 8, 2017: Emergency Nurse: the Journal of the RCN Accident and Emergency Nursing Association
https://www.readbyqxmd.com/read/29218260/a-case-of-streptococcus-anginosus-brain-abscess-caused-by-contiguous-spread-from-sinusitis-in-an-immunocompetent-patient
#10
Nathan Esplin, John W Stelzer, Sean All, Sundeep Kumar, Ejaz Ghaffar, Sayed Ali
Brain abscesses are infections of the brain parenchyma that can arise from either contiguous spread from local infection or by hematogenous spread from a distant site. Streptococcus anginosus of the Streptococcus anginosus group (SAG) is a commensal microbe of the mucosae of the oral cavity, gastrointestinal tract, and urogenital tract. We present a case of mono-microbial brain abscess caused by contiguous spread from relatively asymptomatic sinusitis that initially presented as a subdural hemorrhage on computed tomography...
October 4, 2017: Curēus
https://www.readbyqxmd.com/read/29217326/the-effect-of-fish-gender-on-susceptibility-to-acute-streptococcus-agalactiae-infection-in-javanese-medaka-oryzias-javanicus
#11
M N A Amal, S T Zarif, M Suhaiba, M R M Aidil, N N Shaqinah, M Zamri-Saad, A Ismail
This study describes the susceptibility of different fish gender following acute Streptococcus agalactiae infection by using Javanese medaka Oryzias javanicus as test fish. The fish were grouped into four groups, which were: (1) all-male; (2) all-female; (3) mixed-gender (1 male: 1 female ratio); and (4) control non-infected (1 male: 1 female ratio). The fish in group 1, 2 and 3 were intraperitoneally exposed to 5.4 × 108 CFU/ml of S. agalactiae, while for group 4, the fish were exposed using sterile broth...
December 4, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29211057/neonatal-neutrophils-stimulated-by-group-b-streptococcus-induce-a-proinflammatory-t-helper-cell-bias
#12
Jianguo Lin, Seema Haridas, Stephen J Barenkamp, Larissa Chioquetta Lorenset, Ashley Sang Eun Lee, Benjamin T Schroeder, Guangyong Peng, Joyce M Koenig
BackgroundGroup B Streptococcus (GBS) infection causes inflammatory comorbidities in newborns. While the mechanisms remain unclear, evidence suggests that impaired innate-adaptive immune interactions may be contributory. We hypothesized that GBS-stimulated neonatal neutrophils provide a milieu that may drive proinflammatory T-helper (Th) cell programming.MethodsNeutrophils were stimulated with Type III GBS (COH1); supernatants or intact neutrophils were cocultured with CD4+ T cells or regulatory T cells (Tregs)...
December 6, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29209311/codevelopment-of-microbiota-and-innate-immunity-and-the-risk-for-group-b-streptococcal-disease
#13
REVIEW
Julia Kolter, Philipp Henneke
The pathogenesis of neonatal late-onset sepsis (LOD), which manifests between the third day and the third month of life, remains poorly understood. Group B Streptococcus (GBS) is the most important cause of LOD in infants without underlying diseases or prematurity and the third most frequent cause of meningitis in the Western world. On the other hand, GBS is a common intestinal colonizer in infants. Accordingly, despite its adaption to the human lower gastrointestinal tract, GBS has retained its potential virulence and its transition from a commensal to a dangerous pathogen is unpredictable in the individual...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29208784/impact-of-mouthwashes-on-antibacterial-activity-of-subjects-with-fixed-orthodontic-appliances-a-randomized-clinical-trial
#14
A Nishad, N S Sreesan, Joseph Joy, Lakshmi Lakshmanan, Joyce Thomas, V A Anjali
AIM: The study aimed to assess the impact of mouthwashes on antibacterial activity of individuals with fixed orthodontic appliances. MATERIALS AND METHODS: A total of 60 individuals were considered in the study. Sixty (20 each group) nonextraction class I individuals were randomly divided into experimental and control groups. Group I: Experimental group [chlorhexidine (CHX) mouthwash], group II: Experimental group (neem mouthwash), group III: Control group (distilled water)...
December 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29207796/clinico-aetiological-study-of-severe-and-very-severe-pneumonia-in-two-months-to-five-years-children-in-a-tertiary-health-care-centre-in-odisha-india
#15
Jyotiranjan Champatiray, Jyotiranjan Satapathy, Baikunthanath Kashyap, Dipankar Mondal
Introduction: Pneumonia is a major cause of mortality under five-year-old children. In spite of recent advances in management, there is paucity of data on clinical, aetiological profile of severe and very severe pneumonia among under five-year-old children in developing countries. Aim: To determine the clinico-aetiological factors of severe and very severe pneumonia and its outcome in children aged two -months to five-years in a tertiary health care centre in Odisha, India...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29207120/the-antibacterial-effect-of-topical-ozone-on-the-treatment-of-mrsa-skin-infection
#16
Mingsheng Song, Qinghai Zeng, Yaping Xiang, Lihua Gao, Jian Huang, Jinhua Huang, Kathy Wu, Jianyun Lu
Skin can be infected by many types of microorganisms, most commonly by gram‑positive strains of Staphylococcus and Streptococcus spp. Treatment of Staphylococcus aureus (S. aureus) infections, particularly that of methicillin resistant Staphylococcus aureus (MRSA), is a challenge in clinical practice. Ozone therapy has proven to be one of the strongest antiseptics against the majority of microorganisms involved in skin infections. The purpose of the present study was to evaluate the microbicidal effects of topical ozone therapy on S...
November 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29201193/effect-of-different-treatments-and-alcohol-addiction-on-gut-microbiota-in-minimal-hepatic-encephalopathy-patients
#17
Zan Zuo, Hong Fan, Xiao-Dan Tang, Yan-Min Chen, Lin-Ting Xun, Yan Li, Zheng-Ji Song, Hui-Qiong Zhai
Minimal hepatic encephalopathy (MHE) is caused by dysbiosis of gut microbiota, particularly the ammonia-producing bacteria. Given the efficacy of certain treatments on MHE and the connection between alcoholism and MHE, a thorough understanding of how these strategies affect the gut microbiota in patients (alcoholic or non-alcoholic) will facilitate the assessment of their efficacy in the reshaping of gut microbiota. In the present study, a metagenomics approach was adopted to reveal alterations in gut microbiota of 14 MHE patients following treatment with rifaximin alone or rifaximin plus probiotics...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29200666/prevention-of-memory-impairment-and-neurotrophic-factors-increased-by-lithium-in-wistar-rats-submitted-to-pneumococcal-meningitis-model
#18
Lutiana R Simões, Roberta R E S Abreu, Jaqueline S Generoso, Jéssica A Goularte, Allan Collodel, Vijayasree Vayalanellore Giridharan, Anitha Christy Sigamani Arumanayagam, Samira S Valvassori, João Quevedo, Tatiana Barichello
The aim of this study was to investigate the effects of lithium on brain-derived neurotrophic factor (BDNF), nerve growth factor (NGF), and glial cell line-derived neurotrophic factor (GDNF) expression in the hippocampus and on memory in experimental pneumococcal meningitis. The mood-stabilizer lithium is known as a neuroprotective agent with many effects on the brain. In this study, animals received either artificial cerebrospinal fluid or Streptococcus pneumoniae suspension at a concentration of 5 × 109 CFU/mL...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29198102/antimicrobial-and-antibiofilm-activity-of-human-milk-oligosaccharides-against-streptococcus-agalactiae-staphylococcus-aureus-and-acinetobacter-baumannii
#19
Dorothy L Ackerman, Kelly M Craft, Ryan S Doster, Jörn-Hendrik Weitkamp, David M Aronoff, Jennifer A Gaddy, Steven D Townsend
In a previous study, we reported that human milk oligosaccharides (HMOs) isolated from five donor milk samples possessed antimicrobial and antibiofilm activity against Streptococcus agalactiae, also known as Group B Streptococcus or GBS. Herein, we present a broader evaluation of the antimicrobial and antibiofilm activity by screening HMOs from 14 new donors against three strains of GBS and two of the ESKAPE pathogens of particular interest to child health, Staphylococcus aureus and Acinetobacter baumannii...
December 8, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29196169/purinergic-system-displays-an-anti-inflammatory-profile-in-serum-of-silver-catfish-experimentally-infected-with-streptococcus-agalactiae-an-attempt-to-ameliorate-the-inflammatory-response
#20
Matheus D Baldissera, Carine F Souza, Roberto C V Santos, Bernardo Baldisserotto
The purinergic system is recognized to modulate extracellular adenosine triphosphate (ATP) and related nucleotides through the activities of triphosphate diphosphohydrolase (NTPDase), 5'-nucleotidase, and adenosine deaminase (ADA), thereby playing an essential role in the immunoregulation of inflammatory and immune responses. Thus, the aim of this study was to evaluate whether the purinergic system can improve the inflammatory response in fish experimentally infected with Streptococcus agalactiae through the modulation of seric NTPDase, 5'-nucleotidase and ADA activities...
November 28, 2017: Microbial Pathogenesis
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