keyword
MENU ▼
Read by QxMD icon Read
search

enterococcus faecalis virulence factors

keyword
https://www.readbyqxmd.com/read/29521051/typing-of-enterococcus-spp-strains-in-4-hospitals-in-the-ma%C3%A5-opolska-region-in-poland
#1
Katarzyna Talaga, Dalma Odrowąż-Konduracka, Beata Paradowska, Barbara Jagiencarz-Starzec, Zdzisław Wolak, Małgorzata Bulanda, Anna Szczypta
BACKGROUND: In the Małopolska province, the first case of vancomycin resistant enterococci (VRE) occurrence was an outbreak in 2001 caused by strains of the genus E. faecium carrying the vanA operon. OBJECTIVES: The aim of this study is to determine the antimicrobial resistance and the occurrence of virulence determinants among Enterococcus spp. in patients hospitalized in the Małopolska region in 2015. MATERIAL AND METHODS: Antimicrobial susceptibility was determined by disc diffusion and the E test...
January 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29390078/effect-of-tedizolid-on-clinical-enterococcus-isolates-in-vitro-activity-distribution-of-virulence-factor-resistance-genes-and-multilocus-sequence-typing
#2
Bing Bai, Kaitao Hu, Hui Li, Weiming Yao, Duoyun Li, Zhong Chen, Hang Cheng, Jinxin Zheng, Weiguang Pan, Minggui Deng, Xiaojun Liu, Zhiwei Lin, Qiwen Deng, Zhijian Yu
Enterococcal infections have become one of the most challenging nosocomial problems. Tedizolid, the second oxazolidinone is four- to eight-fold more potent in vivo and in vitro than linezolid against enterococci. However, the characteristics of tedizolid related to enterococci isolates in China remain elusive. The aim of this study was to evaluate in vitro activity of tedizolid against enterococcal isolates from patients with infections at a teaching hospital in China and to investigate the correlations between in vitro tedizolid activity against enterococci and the distribution of multilocus sequence types (MLST), resistance genes, and virulence factors...
December 27, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29379180/exploration-of-the-role-of-the-virulence-factor-elra-during-enterococcus-faecalis-cell-infection
#3
Natalia Nunez, Aurélie Derré-Bobillot, Stéphane Gaubert, Jean-Marie Herry, Julien Deschamps, Yu Wei, Thomas Baranek, Mustapha Si-Tahar, Romain Briandet, Pascale Serror, Cristel Archambaud
Enterococcus faecalis, an organism generally not pathogenic for healthy humans, has the potential to cause disease in susceptible hosts. While it seems to be equipped to interact with and circumvent host immune defense, most of the molecular and cellular mechanisms underlying the enterococcal infectious process remain elusive. Here, we investigated the role of the Enterococcal Leucine Rich protein A (ElrA), an internalin-like protein of E. faecalis also known as a virulence factor. ElrA was previously shown to prevent adhesion to macrophages...
January 29, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29372297/genomic-and-functional-characterisation-of-two-enterococcus-strains-isolated-from-cotija-cheese-and-their-potential-role-in-ripening
#4
Myrna Olvera-García, Alejandro Sanchez-Flores, Maricarmen Quirasco Baruch
Enterococcus spp. are present in the native microbiota of many traditional fermented foods. Their ability to produce antibacterial compounds, mainly against Listeria monocytogenes, has raised interest recently. However, there is scarce information about their proteolytic and lipolytic potential, and their biotechnological application is currently limited because enterococcal strains have been related to nosocomial infections. In this work, next-generation sequencing and optimised bioinformatic pipelines were used to annotate the genomes of two Enterococcus strains-one E...
January 25, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29319345/surface-properties-of-enterococcus-faecalis-cells-isolated-from-chicken-hearts-determine-their-low-ability-to-form-biofilms
#5
Jolanta Cieśla, Dagmara Stępień-Pyśniak, Agnieszka Nawrocka, Małgorzata Łukowska, Tomasz Hauschild, Andrzej Wernicki, Andrzej Bieganowski
Enterococcus faecalis is one of the most significant bacterial pathogens associated with the first-week mortality of chickens. Here, the surface properties of bacterial cells and the selected virulence factors of E. faecalis strains isolated from the hearts of clinically healthy broiler chickens were studied. Investigations were carried out on live and autoclaved cells. E. faecalis (ATCC 29212) was used as a reference strain. The bacterial cells revealed different haemolytic activities. Their surface free energy was dominated by the hydrophobic component...
February 2018: Biofouling
https://www.readbyqxmd.com/read/29308333/comparison-of-the-antibacterial-efficacy-of-alexidine-and-chlorhexidine-against-enterococcus-faecalis-an-in-vitro-study
#6
Preethi Varadan, Arathi Ganesh, Rudra Konindala, Venkateshbabu Nagendrababu, Rupa Ashok, Kandaswamy Deivanayagam
Introduction Root canal irrigants play an important role in reducing intracanal microorganisms, which in turn helps in achieving a successful outcome for the root canal treatment. Objective To compare the antibacterial efficacy of alexidine and chlorhexidine against Enterococcus faecalis. Methods A total of 50 extracted single-rooted teeth were randomly divided into five groups after being infected with Enterococcus faecalis. The groups were based on irrigants used: Group I - 0.4% alexidine; Group II - 1% alexidine; Group III - 1...
October 26, 2017: Curēus
https://www.readbyqxmd.com/read/29225595/characteristics-of-and-virulence-factors-associated-with-biofilm-formation-in-clinical-enterococcus-faecalis-isolates-in-china
#7
Jin-Xin Zheng, Yang Wu, Zhi-Wei Lin, Zhang-Ya Pu, Wei-Ming Yao, Zhong Chen, Duo-Yun Li, Qi-Wen Deng, Di Qu, Zhi-Jian Yu
Enterococcus faecalis biofilm traits and distribution characteristics in China have not been clarified. This study aimed to determine the prevalence and characteristics of E. faecalis biofilm formation in a sample of clinical isolates and to explore the virulence factors associated with biofilm formation in those isolates. A total of 265 E. faecalis isolates were collected from patients in Shenzhen, China. Virulence genes were detected within the genomes of the microbes by polymerase chain reaction. The isolates were subjected to multilocus sequence typing (MLST) based on housekeeping genes...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29202038/a-novel-biomimetic-nanosponge-protects-the-retina-from-the-enterococcus-faecalis-cytolysin
#8
Austin L LaGrow, Phillip S Coburn, Frederick C Miller, Craig Land, Salai Madhumathi Parkunan, Brian T Luk, Weiwei Gao, Liangfang Zhang, Michelle C Callegan
Intraocular infections are a potentially blinding complication of common ocular surgeries and traumatic eye injuries. Bacterial toxins synthesized in the eye can damage intraocular tissue, often resulting in poor visual outcomes. Enteroccocus faecalis causes blinding infections and is responsible for 8 to 17% of postoperative endophthalmitis cases. These infections are increasingly difficult to treat due to the emergence of multidrug-resistant strains. Virulent E. faecalis isolates secrete a pore-forming bicomponent cytolysin that contributes to retinal tissue damage during endophthalmitis...
November 2017: MSphere
https://www.readbyqxmd.com/read/29168155/in-silico-and-experimental-data-claiming-safety-aspects-and-beneficial-attributes-of-the-bacteriocinogenic-strain-enterococcus-faecalis-b3a-b3b
#9
Alaa Al Seraih, Yanath Belguesmia, Benoit Cudennec, John Baah, Djamel Drider
This study aimed at comparing the genome of Enterococcus faecalis B3A-B3B, a bacteriocinogenic strain recently isolated from a healthy Iraqi infant to those of Enterococci of clinical and beneficial grades. The putative genes gelE, cpd, efaAfm, ccf, agg, and cob coding for virulence factors were detected in B3A-B3B strain, which meanwhile resulted to be non-cytotoxic, non-hemolytic, devoid of inflammatory effects, and sensitive to most of the antibiotics tested except for clindamycin and trimethoprim, which resistance is usually ascribed to intrinsic nature...
November 22, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29148361/characterization-of-biofilm-formation-by-enterococcus-faecalis-isolates-derived-from-urinary-tract-infections-in-china
#10
Jin-Xin Zheng, Bing Bai, Zhi-Wei Lin, Zhang-Ya Pu, Wei-Ming Yao, Zhong Chen, Duo-Yun Li, Xiang-Bin Deng, Qi-Wen Deng, Zhi-Jian Yu
PURPOSE: This study explored the prevalence and characteristics of Enterococcus faecalis biofilm formation by urinary tract infection (UTI) isolates in order to identify virulence factors associated with biofilm formation. METHODOLOGY: A total of 113 E. faecalis isolates were collected from UTI patients in Shenzhen, China. The isolates were subjected to multilocus sequence typing based on housekeeping genes. Biofilms were detected by crystal violet staining and the expression levels of the E...
November 17, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29027384/survey-for-correlation-between-biofilm-formation-and-virulence-determinants-in-a-collection-of-pathogenic-and-fecal-enterococcus-faecalis-isolates
#11
Fereshteh Saffari, Mohammad Sadegh Dalfardi, Shahla Mansouri, Roya Ahmadrajabi
BACKGROUND: Enterococcus faecalis is an opportunistic pathogen that causes most of the enterococcal infections. Among the different factors implicated in the pathogenesis of these organisms, biofilm formation and antibiotic resistance are the most important. The ability for biofilm formation has been attributed to the presence of some virulence genes. However, no definite correlation has been found. This study aimed to detect biofilm formation and antibiotic resistance patterns in E. faecalis isolates collected from clinical and fecal samples, and to investigate possible correlation between some virulence genes (esp, cyl, gelE) and biofilm formation...
September 2017: Infection & Chemotherapy
https://www.readbyqxmd.com/read/28993457/the-electron-transport-chain-sensitizes-staphylococcus-aureus-and-enterococcus-faecalis-to-the-oxidative-burst
#12
Kimberley L Painter, Alex Hall, Kam Pou Ha, Andrew M Edwards
Small-colony variants (SCVs) of Staphylococcus aureus typically lack a functional electron transport chain and cannot produce virulence factors such as leukocidins, hemolysins, or the antioxidant staphyloxanthin. Despite this, SCVs are associated with persistent infections of the bloodstream, bones, and prosthetic devices. The survival of SCVs in the host has been ascribed to intracellular residency, biofilm formation, and resistance to antibiotics. However, the ability of SCVs to resist host defenses is largely uncharacterized...
December 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28894438/characterization-of-enterococcus-isolates-colonizing-the-intestinal-tract-of-intensive-care-unit-patients-receiving-selective-digestive-decontamination
#13
Teresita D J Bello Gonzalez, Phu Pham, Janetta Top, Rob J L Willems, Willem van Schaik, Mark W J van Passel, Hauke Smidt
Enterococci have emerged as important opportunistic pathogens in intensive care units (ICUs). In this study, enterococcal population size and Enterococcus isolates colonizing the intestinal tract of ICU patients receiving Selective Digestive Decontamination (SDD) were investigated. All nine patients included in the study showed substantial shifts in the enterococcal 16S rRNA gene copy number in the gut microbiota during the hospitalization period. Furthermore, 41 Enterococcus spp. strains were isolated and characterized from these patients at different time points during and after ICU hospitalization, including E...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28842537/molecular-determinants-of-the-thickened-matrix-in-a-dual-species-pseudomonas-aeruginosa-and-enterococcus-faecalis-biofilm
#14
Keehoon Lee, Kang-Mu Lee, Donggeun Kim, Sang Sun Yoon
Biofilms are microbial communities that inhabit various surfaces and are surrounded by extracellular matrices (ECMs). Clinical microbiologists have shown that the majority of chronic infections are caused by biofilms, following the introduction of the first biofilm infection model by J. W. Costerton and colleagues (J. Lam, R. Chan, K. Lam, and J. W. Costerton, Infect Immun 28:546-556, 1980). However, treatments for chronic biofilm infections are still limited to surgical removal of the infected sites. Pseudomonas aeruginosa and Enterococcus faecalis are two frequently identified bacterial species in biofilm infections; nevertheless, the interactions between these two species, especially during biofilm growth, are not clearly understood...
November 1, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28791824/anti-enterococcal-activities-of-pentacyclic-triterpenes
#15
Dorota Wojnicz, Dorota Tichaczek-Goska, Kamila Korzekwa, Marta Kicia, Andrzej Hendrich
BACKGROUND: Asiatic (AA) and ursolic (UA) acids are widely studied phytochemicals, but their antimicrobial properties are still poorly understood. Therefore our research has focused on their activity against uropathogenic Enterococcus faecalis strains. OBJECTIVES: The aim of this research was to determine the influence of AA and UA on the growth, cell morphology, virulence factors and biofilm formation by E. faecalis strains. MATERIAL AND METHODS: AA and UA were purchased from Sigma-Aldrich...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28742152/bacterial-size-matters-multiple-mechanisms-controlling-septum-cleavage-and-diplococcus-formation-are-critical-for-the-virulence-of-the-opportunistic-pathogen-enterococcus-faecalis
#16
Bartłomiej Salamaga, Tomasz K Prajsnar, Ana Jareño-Martinez, Joost Willemse, Martin A Bewley, Françoise Chau, Tassadit Ben Belkacem, Annemarie H Meijer, David H Dockrell, Stephen A Renshaw, Stéphane Mesnage
Enterococcus faecalis is an opportunistic pathogen frequently isolated in clinical settings. This organism is intrinsically resistant to several clinically relevant antibiotics and can transfer resistance to other pathogens. Although E. faecalis has emerged as a major nosocomial pathogen, the mechanisms underlying the virulence of this organism remain elusive. We studied the regulation of daughter cell separation during growth and explored the impact of this process on pathogenesis. We demonstrate that the activity of the AtlA peptidoglycan hydrolase, an enzyme dedicated to septum cleavage, is controlled by several mechanisms, including glycosylation and recognition of the peptidoglycan substrate...
July 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28735309/safety-evaluation-of-enterocin-producer-enterococcus-sp-strains-isolated-from-traditional-turkish-cheeses
#17
Mine Avcı, Banu Özden Tuncer
The purpose of this study was to determine the antimicrobial activity and occurrence of bacteriocin structural genes in Enterococcus spp. isolated from different cheeses and also investigate some of their virulence factors. Enterococcus strains were isolated from 33 different cheeses. Enterococcus faecium (6 strains) and Enterococcus faecalis (5 strains) enterocin-producing strains were identified by 16S rDNA analyses. Structural genes entA, entB, entP and entX were detected in some isolates. Multiple enterocin structural genes were found in 7 strains...
July 6, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/28707018/postoperative-enterococcus-faecalis-endophthalmitis-virulence-factors-leading-to-poor-visual-outcome
#18
MULTICENTER STUDY
Daisuke Todokoro, Takashi Suzuki, Shinichiro Kobayakawa, Haruyoshi Tomita, Yuichi Ohashi, Hideo Akiyama
Purpose Postoperative endophthalmitis caused by Enterococcus faecalis often results in poor visual outcome due to retinal destruction. We evaluated the virulence factors of Enterococcus faecalis clinical isolates and analyzed their relationship with retinal destruction and poor visual outcomes in postoperative bacterial endophthalmitis (PBE) following cataract surgery. STUDY DESIGN: Retrospective. METHODS: E. faecalis isolates from nine acute-onset PBE cases were examined using pulsed-field gel electrophoresis of genomic DNA, plasmid isolation and pheromone response experiments...
September 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28676674/the-enterococcus-faecalis-virulence-factor-elra-interacts-with-the-human-four-and-a-half-lim-domains-protein-2
#19
Alexandre Jamet, Rozenn Dervyn, Nicolas Lapaque, Francesca Bugli, Naima G Perez-Cortez, Hervé M Blottière, Jean-Claude Twizere, Maurizio Sanguinetti, Brunella Posteraro, Pascale Serror, Emmanuelle Maguin
The commensal bacterium Enterococcus faecalis is a common cause of nosocomial infections worldwide. The increasing prevalence of multi-antibiotic resistant E. faecalis strains reinforces this public health concern. Despite numerous studies highlighting several pathology-related genetic traits, the molecular mechanisms of E. faecalis virulence remain poorly understood. In this work, we studied 23 bacterial proteins that could be considered as virulence factors or involved in the Enterococcus interaction with the host...
July 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28659548/pathogenicity-of-enterococci
#20
REVIEW
Yasuyoshi Ike
Enterococci belong to the group of lactic acid bacteria (LAB), and inhabit the gastrointestinal tracts of a wide variety of animals from insects and to human, and the commensal organism in humans and animals. The commensal/probiotic role of enterococci has evolved through thousands of years in mutual coexistence. Enterococcus have many favorable traits that have been appreciated in food fermentation and preservation, and many serve as probiotics to promote health. While lactobacillus have been shown to confer numerous benefits on and often regarded as health bringing organisms, enterococci have become more recognized as emerging human pathogens in recent years...
2017: Nihon Saikingaku Zasshi. Japanese Journal of Bacteriology
keyword
keyword
32404
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"