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Enterococcus faecalis

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https://www.readbyqxmd.com/read/28720951/isolation-and-characterization-of-lactic-acid-bacteria-from-traditional-pickles-of-himachal-pradesh-india
#1
Monika, Savitri, Vijay Kumar, Anila Kumari, Kunzes Angmo, Tek Chand Bhalla
A total of 15 isolates of lactic acid bacteria (LAB) were isolated from traditional pickles of rural and urban areas of Himachal Pradesh. These isolates were identified as Enterococcus faecalis (7), Lactobacillus plantarum (3), Pediococcus pentosaceus (2), Leuconostoc mesenteroides (1), Lactococcus lactis (1) and Enterococcus sp. (1) on the basis of morphological, biochemical and 16S rDNA sequence analysis. All the LABs produced exopolysaccharides, have antibiotic susceptibility, and possess activity of β-galactosidase, β-glucosidase, protease and amylase, while none of the isolates showed haemolytic activity...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720810/biofilm-formation-in-enterococci-genotype-phenotype-correlations-and-inhibition-by-vancomycin
#2
Yomna A Hashem, Heba M Amin, Tamer M Essam, Aymen S Yassin, Ramy K Aziz
Enterococci are nosocomial pathogens that can form biofilms, which contribute to their virulence and antibiotic resistance. Although many genes involved in biofilm formation have been defined, their distribution among enterococci has not been comprehensively studied on a genome scale, and their diagnostic ability to predict biofilm phenotypes is not fully established. Here, we assessed the biofilm-forming ability of 90 enterococcal clinical isolates. Major patterns of virulence gene distribution in enterococcal genomes were identified, and the differentiating virulence genes were screened by polymerase chain reaction (PCR) in 31 of the clinical isolates...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719346/virulence-genes-in-biofilm-producer-enterococcus-faecalis-isolates-from-root-canal-infections
#3
M Akbari Aghdam, M H Soroush Barhaghi, M Aghazadeh, F Jafari, M Beomide Hagh, M Haghdoost, M Y Memar, M Ahangarzadeh Rezaee, H Samadi Kafil
Enterococcus faecalis is occurring in opportunistic infections involving the oral cavity. This study aimed to evaluate the presence of E. faecalis virulence genes in dental root canal isolates recovered from advanced chronic periodontitis patients. One hundred E. faecalis isolated from dental root canal during July 2015 to Oct 2016. After analysis of biofilm formation by the semi-quantitative determination in 96-well flat bottom polystyrene plates, the presence of asa, esp, efaA, ace, ebpR, gel and hyl gene were studied by PCR...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28713789/screening-of-oxalate-degrading-lactic-acid-bacteria-of-food-origin
#4
Nicoletta Murru, Giuseppe Blaiotta, Maria Francesca Peruzy, Serena Santonicola, Raffaelina Mercogliano, Maria Aponte
A screening for oxalate degrading abilities was initially carried on within Lactic Acid Bacteria cultures of different food origin. Seventy-nine strains were drop-inoculated onto MRS agar plates containing calcium oxalate. By comparing colonies diameters, 31 strains were used to inoculate, in parallel, MRS and MRS modified by sodium oxalate addition. Differences in the strains' growth were assessed by colony forming unit counts. For two strains, the growth in oxalate enriched medium was significantly higher; while, for eleven strains an opposite behaviour was recorded...
April 13, 2017: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/28713514/detection-of-eight-foodborne-bacterial-pathogens-by-oligonucleotide-array-hybridization
#5
Zohreh Nasrabadi, Reza Ranjbar, Fatemeh Poorali, Meysam Sarshar
BACKGROUND: Simultaneous and rapid detection of multiple foodborne bacterial pathogens is important for the prevention of foodborne illnesses. OBJECTIVE: The aim of this study was to evaluate the use of 16S rDNA and 23S rDNA sequences as targets for simultaneous detection of eight foodborne bacterial pathogens. METHODS: Nineteen bacterial oligonucleotide probes were synthesized and applied to nylon membranes. Digoxygenin labeled 16S rDNA and 23S rDNA from bacteria were amplified by PCR using universal primers, and the amplicons were hybridized to the membrane array...
May 2017: Electronic Physician
https://www.readbyqxmd.com/read/28712894/antimicrobial-and-immunomodulatory-activity-of-host-defense-peptides-clavanins-and-ll-37-in-vitro-an-endodontic-perspective
#6
Stella Maris F Lima, Mirna S Freire, Ana Luisa O Gomes, Ana Paula C Cantuária, Flávia Rodrigues P Dutra, Beatriz S Magalhães, Maurício Gonçalves C Sousa, Ludovico Migliolo, Jeeser A Almeida, Octávio L Franco, Taia Maria B Rezende
Endodontic treatment is mainly based on root canal disinfection and its failure may be motivated by microbial resistance. Endodontic therapy can be benefitted by host defense peptides (HDPs), which are multifunctional molecules that act against persistent infection and inflammation. This study aimed to evaluate the antimicrobial, cytotoxic and immunomodulatory activity of several HDPs, namely clavanin A, clavanin A modified (MO) and LL-37, compared to intracanal medication Ca(OH)2. HDPs and Ca(OH)2 were evaluated by: (1) antimicrobial assays against Candida albicans and Enterococcus faecalis, (2) cytotoxicity assays and (3) cytokine tumor necrosis factor (TNF)-α, monocyte chemoattractant protein (MCP)-1, interleukin (IL)- 1α, IL-6, IL-10 and IL-12 and nitric oxide (NO) production by RAW 264...
July 13, 2017: Peptides
https://www.readbyqxmd.com/read/28708971/short-term-alcohol-abstinence-improves-antibacterial-defenses-of-chronic-alcohol-consuming-mice-against-gut-bacteria-associated-sepsis-caused-by-enterococcus-faecalis-oral-infection
#7
Makiko Kobayashi, Akira Asai, Ichiaki Ito, Sumihiro Suzuki, Kazuhide Higuchi, Fujio Suzuki
The effects of short-term alcohol abstinence on host antibacterial resistance against Enterococcus faecalis oral infection was investigated in chronic alcohol-consuming mice [mice with 0.1 g/day of 20% ethanol consumption for 12 or 16 weeks (CAC-mice)]. These mice were highly susceptible to the infection; however, after 7 days of alcohol abstinence (aaCAC-mice), their antibacterial resistances were completely restored to the normal mouse level. Normal mice inoculated with CAC-mouse hepatic macrophages were shown to be susceptible to the infection, whereas the same macrophage preparation from aaCAC-mice did not impair the antibacterial resistance of normal mice...
July 11, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28708453/virulence-and-antibiotic-resistance-of-enterococci-isolated-from-healthy-breastfed-infants
#8
José M Landete, Ángela Peirotén, Margarita Medina, Juan L Arqués, Eva Rodríguez-Mínguez
Pathogenic ability has been extensively studied in clinical enterococci, but to a lesser extent in community-derived ones. Most studies to date in enterococci from healthy infants have been focused on Enterococcus faecalis, despite the growing concern about nosocomial infections caused by E. faecium. In this work, we studied the antibiotic resistance and virulence determinants of 26 E. faecalis and 15 E. faecium intestinal isolates from Spanish healthy breastfed infants. Overall, commensal enterococci studied contained antibiotic resistance and virulence genes, although their patterns were not according to those described for antibiotic-resistant hospital-associated enterococci...
July 14, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28707817/evaluation-of-free-or-anchored-antimicrobial-peptides-as-candidates-for-the-prevention-of-orthopaedic-device-related-infections
#9
Francesca D'Este, Debora Oro, Gerard Boix-Lemonche, Alessandro Tossi, Barbara Skerlavaj
The prevention of implant-associated infection, one the most feared complications in orthopaedic surgery, remains a major clinical challenge and urges development of effective methods to prevent bacterial colonization of implanted devices. Alpha-helical antimicrobial peptides (AMPs) may be promising candidates in this respect due to their potent and broad-spectrum antimicrobial activity, their low tendency to elicit resistance and possible retention of efficacy in the immobilized state. The aim of this study was to evaluate the potential of five different helical AMPs, the cathelicidins BMAP-27 and BMAP-28, their (1-18) fragments and the rationally designed, artificial P19(9/G7) peptide, for the prevention of orthopaedic implant infections...
July 14, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28707018/postoperative-enterococcus-faecalis-endophthalmitis-virulence-factors-leading-to-poor-visual-outcome
#10
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...
July 13, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28703118/cholelithiasis-always-infected
#11
Tomasz Matyjas, Krzysztof Kaczka, Henryk Witas, Tomasz Płoszaj, Katarzyna Matyjas, Lech Pomorski
This study aims to present results regarding the presence and identification of bacterial strains found in bile and gallstones located in the gallbladder and bile ducts in patients operated on due to cholelithiasis. MATERIALS AND METHODS: Bacterial culture was evaluated in 92 patients. There were 54 women (59%) and 38 men (41%) who underwent surgery on account of cholelithiasis and /or gallstones in bile ducts between 2013 and 2014. Bile and gallstone samples were cultured intraoperatively for bacteria; bacterial strains were identified, and their sensitivity to antibiotics was determined...
June 30, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/28701170/antimicrobial-susceptibility-among-gram-positive-and-gram-negative-organisms-collected-from-the-latin-american-region-between-2004-and-2015-as-part-of-the-tigecycline-evaluation-and-surveillance-trial
#12
Silvio Vega, Michael J Dowzicky
BACKGROUND: The in vitro activity of tigecycline and comparator agents was evaluated against Gram-positive and Gram-negative isolates collected in Latin American centers between 2004 and 2015 as part of the Tigecycline Evaluation and Surveillance Trial (T.E.S.T.) global surveillance study. METHODS: Minimum inhibitory concentrations (MICs) were determined using the broth microdilution methodology according to the Clinical and Laboratory Standards Institute (CLSI) guidelines...
July 12, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28698604/honeybee-apis-mellifera-associated-bacterial-community-affected-by-american-foulbrood-detection-of-paenibacillus-larvae-via-microbiome-analysis
#13
Tomas Erban, Ondrej Ledvinka, Martin Kamler, Marta Nesvorna, Bronislava Hortova, Jan Tyl, Dalibor Titera, Martin Markovic, Jan Hubert
Honeybee (Apis mellifera L.) workers act as passive vectors of Paenibacillus larvae spores, which cause the quarantine disease American foulbrood (AFB). We assessed the relative proportions of P. larvae within the honeybee microbiome using metabarcoding analysis of the 16 S rRNA gene. The microbiome was analyzed in workers outside of the AFB zone (control - AFB0), in workers from asymptomatic colonies in an AFB apiary (AFB1), and in workers from colonies exhibiting clinical AFB symptoms (AFB2). The microbiome was processed for the entire community and for a cut-off microbiome comprising pathogenic/environmental bacteria following the removal of core bacterial sequences; varroosis levels were considered in the statistical analysis...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28689800/investigation-and-analysis-of-the-characteristics-and-drug-sensitivity-of-bacteria-in-skin-ulcer-infections
#14
Hang Yang, Wen-Sheng Wang, Yang Tan, Dao-Jun Zhang, Jin-Jin Wu, Xia Lei
PURPOSE: Skin ulcer is a common type of disease affecting patients' health and quality of life, and bacterial infection increases the difficulty of its management. METHODS: The present study collected the results of bacterial culture sampled from the surface of 110 cases of skin ulcers at our hospital from January 2011 to December 2012. We analyzed the constituent ratios of ulcer surface bacteria, the change in the main infectious bacteria and the results of drug-sensitivity testing for common bacteria...
May 24, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28685097/restructuring-of-enterococcus-faecalis-biofilm-architecture-in-response-to-antibiotic-induced-stress
#15
Jennifer L Dale, Jennifer L Nilson, Aaron M T Barnes, Gary M Dunny
Bacterial biofilms are intrinsically resistant to antimicrobial treatment, which contributes to microbial persistence in clinical infections. Enterococcus faecalis is an opportunistic pathogen that readily forms biofilms and is the most prevalent enterococcal species identified in healthcare-associated infections. Since intrinsic resistance to multiple antibiotics is common for enterococci, and antibiotic resistance is elevated in biofilm populations, it is imperative to understand the mechanisms involved. Previously, we identified two glycosyltransferase genes whose disruption resulted in impaired nascent biofilm formation in the presence of antibiotic concentrations subinhibitory for parent growth and biofilm formation...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/28684576/draft-genome-sequence-of-enterococcus-faecalis-atcc-baa-2128
#16
Catherine Putonti, Laurynas Kalesinskas, Evan Cudone, Kathleen C Engelbrecht, David W Koenig, Alan J Wolfe
While a part of the native gut microflora, the Gram-positive bacterium Enterococcus faecalis can lead to serious infections elsewhere in the body. The draft genome of E. faecalis strain ATCC BAA-2128, isolated from piglet feces, was examined. This draft genome consists of 42 contigs, 12 of which exhibit homology to annotated plasmids.
July 6, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28684323/role-of-purified-%C3%AE-1-3-glucan-binding-protein-%C3%AE-gbp-from-paratelphusa-hydrodromus-and-their-anti-inflammatory-antioxidant-and-antibiofilm-properties
#17
Arokiadhas Iswarya, Mahalingam Anjugam, Baskaralingam Vaseeharan
β- 1, 3-glucan binding protein (β-GBP), a pattern recognition protein (PRP), plays a critical role in triggering the innate immune response by detecting β-glucan found on the surface of microbes. In the present study, β-GBP was purified from the haemolymph of rice field crab Paratelphusa hydrodromus by affinity column chromatography. The monomeric protein Ph-β-GBP appeared as a single band with a molecular weight of approximately 95 kDa in SDS-PAGE analysis and its purity was determined to be 89% by HPLC...
July 3, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28683409/thymus-vulgaris-l-extract-has-antimicrobial-and-anti-inflammatory-effects-in-the-absence-of-cytotoxicity-and-genotoxicity
#18
Jonatas Rafael de Oliveira, Daiane de Jesus Viegas, Ana Paula Réquia Martins, Cláudio Antonio Talge Carvalho, Cristina Pacheco Soares, Samira Esteves Afonso Camargo, Antonio Olavo Cardoso Jorge, Luciane Dias de Oliveira
OBJECTIVES: This study evaluated the biological effects of the T. vulgaris L. extract., such as antimicrobial activity on planktonic cultures and mono- and polymicrobial biofilms, cytotoxicity, anti-inflammatory activity and genotoxicity. METHODS: Monomicrobial biofilms of Candida albicans, Staphylococcus aureus, Enterococcus faecalis, Streptococcus mutans and Pseudomonas aeruginosa and polymicrobial biofilms composed by C. albicans with each bacterium were formed for 48h and exposed for 5min to the plant extract...
June 27, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28680588/incidence-clinical-characteristics-and-outcomes-of-nosocomial-enterococcus-spp-bloodstream-infections-in-a-tertiary-care-hospital-in-beijing-china-a-four-year-retrospective-study
#19
Yangyang Zhang, Mingmei Du, Yan Chang, Liang-An Chen, Qing Zhang
BACKGROUND: Enterococcus spp. are the common cause of nosocomial bloodstream infections (BSIs) with high morbidity and mortality. The purpose of this study was to characterize the incidence, clinical and microbiological features, and mortality of nosocomial enterococcal BSIs at a large Chinese tertiary-care hospital in Beijing, China. METHODS: A retrospective cohort study on adult patients with nosocomial BSIs due to Enterococcus spp. was performed between January 1, 2012, and December 31, 2015 at the Chinese People's Liberation Army General Hospital...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28676674/the-enterococcus-faecalis-virulence-factor-elra-interacts-with-the-human-four-and-a-half-lim-domains-protein-2
#20
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
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