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Enterococcus faecalis

Maria Lennerås, Georgios Tsikandylakis, Margarita Trobos, Omar Omar, Forugh Vazirisani, Anders Palmquist, Örjan Berlin, Rickard Brånemark, Peter Thomsen
The breach of the skin barrier is a critical issue associated with the treatment of individuals with transfemoral amputation (TFA) using osseointegrated, percutaneous titanium implants. Thirty TFA patients scheduled for abutment exchange or removal were consecutively enrolled. The aims were to determine the macroscopic skin signs, the presence of bacteria and the gene expression in abutment-adherent cells and to conduct correlative and comparative analyses between the different parameters. Redness and a granulation ring were present in 47% of the patients...
October 17, 2016: Journal of Biomedical Materials Research. Part A
Ulla Forsgren-Brusk, Birgitta Yhlen, Marie Blomqvist, Peter Larsson
PURPOSE: The purpose of this study was to evaluate a pragmatic laboratory method to provide a technique for developing incontinence products better able to reduce malodor when used in the clinical setting. METHODS: Bacterial growth and bacterially formed ammonia in disposable absorbent incontinence products was measured by adding synthetic urine inoculated with bacteria to test samples cut from the crotch area of the product. The inhibitory effect's of low pH (4...
October 5, 2016: Journal of Wound, Ostomy, and Continence Nursing
Anatoliy Kubyshkin, Denis Chegodar, Andrew Katsev, Armen Petrosyan, Yuri Krivorutchenko, Olga Postnikova
BACKGROUND/PURPOSE: To investigate the effect of nanosilver particles in solution stabilized in a matrix of sodium alginate on the growth and development of pathogenic bacteria such as Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Proteus vulgaris, Enterobacter cloacae, the antibiotic-resistant strain of Pseudomonas aeruginosa, the yeast-like fungus Candida albicans, and the luminescent bacteria Photobacterium leiognathi Sh1. METHODS: Isolates of pathogenic bacteria obtained from bronchoalveolar and peritoneal lavage samples from Wistar rats with experimental pneumonia and peritonitis were tested for their susceptibility to silver nanoparticles in solution with an alginate stabilizer...
2016: Biochemistry & Molecular Biology Journal
Li-Wan Lee, Ya-Ling Lee, Sheng-Huang Hsiao, Hung-Pin Lin
BACKGROUND/PURPOSE: Bacteria in the tooth root canal may cause apical periodontitis. This study examined the bacterial species present in the apical root canal of teeth with apical periodontitis. Antibiotic sensitivity tests were performed to evaluate whether these identified bacterial species were susceptible to specific kinds of antibiotics. METHODS: Selective media plating and biochemical tests were used first to detect the bacterial species in samples taken from the apical portion of root canals of 62 teeth with apical periodontitis...
October 10, 2016: Journal of the Formosan Medical Association, Taiwan Yi Zhi
G S Tansarli, T Skalidis, N J Legakis, M E Falagas
Bacterial vaginosis (BV), candidiasis, and trichomoniasis were the three established types of vaginal conditions until aerobic vaginitis (AV) was defined in the early 2000s. We sought to study the prevalence of abnormal vaginal flora (AVF) with inflammation in our hospital and to correlate it with AV. We prospectively collected vaginal smear specimens originated from symptomatic women who were examined at Iaso Obstetrics, Gynecology and Children's Hospital of Athens from April 2014 until September 2015. Amsel's criteria were used for the diagnosis of BV...
October 13, 2016: European Journal of Clinical Microbiology & Infectious Diseases
Damien Keogh, Wei Hong Tay, Yao Yong Ho, Jennifer L Dale, Siyi Chen, Shivshankar Umashankar, Rohan B H Williams, Swaine L Chen, Gary M Dunny, Kimberly A Kline
Enterococcus faecalis is frequently associated with polymicrobial infections of the urinary tract, indwelling catheters, and surgical wound sites. E. faecalis co-exists with Escherichia coli and other pathogens in wound infections, but mechanisms that govern polymicrobial colonization and pathogenesis are poorly defined. During infection, bacteria must overcome multiple host defenses, including nutrient iron limitation, to persist and cause disease. In this study, we investigated the contribution of E. faecalis to mixed-species infection when iron availability is restricted...
October 12, 2016: Cell Host & Microbe
Elizabeth R Hughes, Sebastian E Winter
Many infectious diseases involve polymicrobial infections, which are characterized by synergistic interactions between different microorganisms colonizing a host. In this issue of Cell Host & Microbe, Keogh et al. (2016) show that Enterococcus faecalis promotes Escherichia coli biofilm formation in low-iron conditions, thus facilitating polymicrobial growth.
October 12, 2016: Cell Host & Microbe
Mu-Ya Chen, Felipe Lira, Hua-Qing Liang, Rui-Ting Wu, Jia-Hong Duan, Xiao-Ping Liao, José L Martínez, Ya-Hong Liu, Jian Sun
In this study we isolated 109 Enterococcus faecalis from chicken faecal samples in 6 provinces of China to investigate the prevalence and transmission mechanism of the bacitracin resistance locus bcrABDR in E. faecalis. Thirty-seven bcrABDR-positive E. faecalis were detected with 26 different PFGE clusters. The MLST of 14 positive strains belonged to ST16 and we also detected three new sequence types. S1-PFGE analysis indicated that the locus was located on plasmids presenting different sizes, with the most prevalent size being ~50 kb (13/37)...
October 12, 2016: Scientific Reports
Mehmet Burak Guneser, Makbule Bilge Akbulut, Ayce Unverdi Eldeniz
The aim of the present study was to compare the antimicrobial effect of sodium hypochlorite (NaOCl), 2% chlorhexidine (CHX), a CHX/cetrimide solution (CHX+CTR), octenidine hydrochloride (OCT) and Salvia officinalis plant extract against Enterococcus faecalis. Seventy decoronated single-rooted human teeth were infected and divided into 6 test (n=10) and 2 control groups (n=5) (negative, sterile samples and positive, infected samples). Following irrigants were then applied to test groups: 2.5% NaOCl, 5.25% NaOCl, CHX, CHX+CTR, S...
2016: Dental Materials Journal
Satyendra Kaushal, Tuhina Banerjee, Shampa Anupurba, Ashok Kumar
The increasing reports of vancomycin-resistant enterococci (VRE) as a cause of neonatal septicemia are of recent interest. However, in majority of the cases, the source of VRE could not be located. As a consequence, the real importance of VRE and its control measures is undermined. Herein, we report a case of neonatal septicemia due to VRE (Enterococcus faecalis) of vanA genotype with VRE carriage in stool of the neonates as a possible source of sepsis. The report put forwards some lacunae in the infection control practices that are presently followed in the country...
October 2016: Indian Journal of Pathology & Microbiology
W Chen, J Liang, Z He, W Jiang
Enterococcus faecalis is the major pathogen of post-endodontic disease and refractory periapical periodontitis, and recent research on this species has focused on its pathogenicity. E. faecalis most often causes disease in the form of a biofilm, and total protein expression shows a strong association with its virulence. Therefore, the purpose of our study was to explore different methods of extracting the total proteins of the E. faecalis (ATCC 33186 standard strain) biofilm. The total proteins in the biofilm were extracted using an ultrasonication method with varied parameters, including duration, amplitude setting, period, and duty cycle...
August 30, 2016: Genetics and Molecular Research: GMR
A Nowakiewicz, G Ziółkowska, A Trościańczyk, P Zięba, S Gnat
The aim of this study was to determine the antimicrobial resistance of E. faecalis and E. faecium strains isolated from poultry and to carry out genotypic characterization thereof with the ADSRRS-fingerprinting method (amplification of DNA fragments surrounding rare restriction sites) and analysis of the genetic relatedness between the isolates with different resistance and virulence determinants. Samples were collected from 70 4-week-old chickens and tested for Enterococcus Minimum inhibitory concentrations of 11 antimicrobials were determined using the broth microdilution method...
October 4, 2016: Poultry Science
Dennis Flanagan
E. faecalis appears in many tooth root infections and is not eliminated by root canal therapy. It can reside in tooth root canals and the surrounding bone. This species may vegetate in bone after extraction of an infected tooth and colonize a dental implant after placement in the healed site. A colonization may cause fixture loss or marginal bone loss. These colonizations are generally multi-bacterial and pathogenic properties can be shared via plasmids. However, E. faecalis is not detectable with some culture techniques and thus can be missed...
October 4, 2016: Journal of Oral Implantology
Lin Wang, Xianju Xie, Michael D Weir, Ashraf F Fouad, Liang Zhao, Hockin H K Xu
The objectives of this study were to: (1) develop a new bioactive dental bonding agent with nanoparticles of amorphous calcium phosphate and dimethylaminohexadecyl methacrylate for tooth root caries restorations and endodontic applications, and (2) investigate biofilm inhibition by the bioactive bonding agent against eight species of periodontal and endodontic pathogens for the first time. Bonding agent was formulated with 5 % of dimethylaminohexadecyl methacrylate. Nanoparticles of amorphous calcium phosphate at 30 wt% was mixed into adhesive...
November 2016: Journal of Materials Science. Materials in Medicine
Matthieu Rousseau, H M Sharon Goh, Sarah Holec, Matthew L Albert, Rohan B H Williams, Molly A Ingersoll, Kimberly A Kline
Catheter-associated urinary tract infections (CAUTI) are the most common hospital-associated infections. Here, we report that bladder catheterization initiated a persistent sterile inflammatory reaction within minutes of catheter implantation. Catheterization resulted in increased expression of genes associated with defense responses and cellular migration, with ensuing rapid and sustained innate immune cell infiltration into the bladder. Catheterization also resulted in hypersensitivity to Enterococcus faecalis and uropathogenic Escherichia coli (UPEC) infection, in which colonization was achieved using an inoculum 100-fold lower than the ID90 for infection of an undamaged urothelium with the same uropathogens...
September 22, 2016: JCI Insight
Agata Jurczak-Kurek, Tomasz Gąsior, Bożena Nejman-Faleńczyk, Sylwia Bloch, Aleksandra Dydecka, Gracja Topka, Agnieszka Necel, Magdalena Jakubowska-Deredas, Magdalena Narajczyk, Malwina Richert, Agata Mieszkowska, Borys Wróbel, Grzegorz Węgrzyn, Alicja Węgrzyn
A large scale analysis presented in this article focuses on biological and physiological variety of bacteriophages. A collection of 83 bacteriophages, isolated from urban sewage and able to propagate in cells of different bacterial hosts, has been obtained (60 infecting Escherichia coli, 10 infecting Pseudomonas aeruginosa, 4 infecting Salmonella enterica, 3 infecting Staphylococcus sciuri, and 6 infecting Enterococcus faecalis). High biological diversity of the collection is indicated by its characteristics, both morphological (electron microscopic analyses) and biological (host range, plaque size and morphology, growth at various temperatures, thermal inactivation, sensitivity to low and high pH, sensitivity to osmotic stress, survivability upon treatment with organic solvents and detergents), and further supported by hierarchical cluster analysis...
October 4, 2016: Scientific Reports
Carlos Narciso-da-Rocha, Célia M Manaia
The aim of this study was to assess the fate of invasive antibiotic resistance genes (ARG) discharged in wastewater. With this objective, antibiotic resistant bacteria (ARB) known to harbor specific ARG were inoculated in wastewater (hospital effluent, or municipal raw and treated wastewater) and in ultra-pure sterile water microcosms. Two sets of wastewater ARB isolates were used - set 1, Enterococcus faecalis, Acinetobacter johnsonii, Klebsiella pneumoniae and set 2, Enterococcus faecium, Acinetobacter johnsonii, Escherichia coli...
September 30, 2016: Science of the Total Environment
R Večeřová, K Bogdanová, D Rejman, J Gallo, M Kolář
OBJECTIVE: The study aimed at determining the ability of lipophosphonoxin DR5026 to inhibit the formation of bacterial biofilm on the bone cement surface and assessing potential development of bacterial resistance. MATERIAL AND METHODS: Bone cement (Hi-Fatigue Bone Cement 2x40, aap Biomaterials GmbH, Germany) was polymerized with lipophosphonoxin DR5026. Cement samples were cultured using bacterial suspension containing Staphylococcus epidermidis CCM7221 at an inoculum density of 106 CFU/mL...
2016: Epidemiologie, Mikrobiologie, Imunologie
Weixu Chen, Jingping Liang, Zhiyan He, Wei Jiang
ABSTACT This study aimed to investigate the dynamic changes that occur in the chemical composition of an Enterococcus faecalis (E. faecalis) biofilm under conditions of starvation and in an alkaline environment and to explore the function of chemical composition changes in the resistance of the E. faecalis biofilm to an extreme environment. This study established an in vitro E. faecalis biofilm model under starvation and in an alkaline environment. During the formation of the biofilm, the pH value and nutritional condition of the culture medium were changed, and the changes in chemical composition were observed using biochemical measures...
September 30, 2016: Bioengineered
Ivana Toljan, Ivona Bago, Jurič, Ivica Anić
AIM: The aim of the study was to compare the antimicrobial efficacy of three irrigation techniques after the use of standardized volume of NaOCl and with standardized time and irrigation. METHODOLOGY: Forty-eight single rooted teeth were inoculated with an Enterococcus faecalis suspension for 24 h. The remaining six canals served as negative controls. The 36 root canals were randomly distributed into three experimental groups; group 1, conventional syringe irrigation; group 2, automated-dynamic irrigation (RinsEndo); group 3, passive ultrasonic irrigation (PUI)...
March 2016: Acta Stomatologica Croatica
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