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Staphylococcus epidermidis

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https://www.readbyqxmd.com/read/28822873/surface-modification-of-an-intraocular-lens-material-by-plasma-assisted-grafting-with-2-hydroxyethyl-methacrylate-hema-for-controlled-release-of-moxifloxacin
#1
A Paula Vieira, Andreia F R Pimenta, Diana Silva, M Helena Gil, Patrícia Alves, Patrícia Coimbra, José L G C Mata, Dimitriya Bozukova, Tiago R Correia, Ilídio J Correia, A Paula Serro, A Jorge Guiomar
Endophthalmitis, an inflammation of the eye due to perioperative infection, may occur after cataract surgery. Intraocular lenses (IOLs) loaded with an antibiotic have been proposed as an alternative to the conventional postoperative endophthalmitis prophylaxis, since the antibiotic is delivered directly to the target site. In this work, an IOL-based antibiotic releasing system was prepared from a copolymer used in the production of IOLs and a fluoroquinolone used in endophthalmitis prophylaxis (moxifloxacin, MFX)...
August 16, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28822698/staphylococcus-aureus-from-atopic-dermatitis-skin-alters-cytokine-production-triggered-by-monocyte-derived-langerhans-cell
#2
Kazumasa Iwamoto, Masaya Moriwaki, Yoshie Niitsu, Masachika Saino, Shunsuke Takahagi, Junzo Hisatsune, Motoyuki Sugai, Michihiro Hide
BACKGROUND: Atopic dermatitis (AD) is one of the most common chronic inflammatory skin diseases. The skin of patients with AD presents as a disbalance of the microbiome with a strong colonization by Staphylococcus aureus, which positively correlates with the severity of the disease. However, the effect of colonized S. aureus on the skin immune system has not been fully elucidated. OBJECTIVE: The aim of this study is to explore whether S. aureus isolated from AD skin is able to skew T cell responses via Langerhans cells (LC) as compared to a standard strain of S...
August 5, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28822159/-effect-of-sodium-houttuyfonate-in-combination-with-erythromycin-on-luxs-agr-rna%C3%A2-of-staphylococus-epidermidis
#3
Gan-Fei Xu, Jing-Jing Wang, Da-Qiang Wu, Yan Guan
Quorum sensing of bacteria and its specific gene expression regulation have a very important role in bacterial biofilm formation. LuxS and agr are the key regulatory genes in quorum sensing of Staphylococcus epidermidis, and RNA Ⅲ is the effector molecule of agr system. In order to evaluate the effects of sodium houttuyfonate in combination with erythromycin on the transcription level of S. epidermidis, serial dilution method was used to determine the MIC of sodium houttuyfonate, erythromycin and vancomycin on S...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28820412/-to-the-state-of-the-fetoplacental-complex-in-women-with-the-threat-of-abortion
#4
L Rzaguliyeva, Z Osmanli, S Akperbekova, N Meybalizade
The goal is a comprehensive study of the morphofunctional state of the mother-placenta-fetus system in placental insufficiency and infection. 250 pregnant and puerperas for the period 2008-2014 were examined. Detection of bacterial flora was carried out in 35 pregnant women aged 20.4±0.8 years with the threat of abortion from an early gestation period and a prolonged persistent infection of the genitals, bacterial vaginosis. Methods are applied: culture, ion chromatography, gas-liquid chromatography with mass spectrometry...
July 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28820111/description-of-actinokineospora-acnipugnans-sp-nov-an-actinomycete-isolated-from-soil-showing-potential-uses-in-cosmetics
#5
Ram Hari Dahal, Dong Seop Shim, Jaisoo Kim
During isolation of soil bacteria having antibacterial functions, an aerobic, Gram-stain-positive, oxidase-negative, catalase-positive bacterium, designated strain R434T, was isolated. Strain R434T showed antimicrobial activity against Propionibacterium acnes and Staphylococcus epidermidis and significant enzyme-inhibitory capability. The diagnostic diamino acid of the cell-wall peptidoglycan was meso-diaminopimelic acid, and the whole-cell sugars were galactose, arabinose and glucose. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that strain R434T formed a lineage within the family Pseudonocardiaceae...
August 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28810329/-distribution-and-drug-resistance-of-pathogens-at-hematology-department-of-jiangsu-province-from-2014-to-2015-results-from-a-multicenter-retrospective-study
#6
Y K Wan, W Sang, B Chen, Y G Yang, L Q Zhang, A N Sun, Y J Liu, Y Xu, Y P Cai, C B Wang, Y F Shen, Y W Jiang, X Y Zhang, W Xu, M Hong, T Chen, R R Xu, F Li, Y L Xu, Y Xue, Y L Lu, Z M He, W M Dong, Z Chen, M H Ji, Y Y Yang, L J Zhai, Y Zhao, G Q Wu, J H Ding, J Cheng, W B Cai, Y M Sun, J Ouyang
Objective: To describe the distribution and drug resistance of pathogens at hematology department of Jiangsu Province from 2014 to 2015 to provide reference for empirical anti-infection treatment. Methods: Pathogens were from hematology department of 26 tertiary hospitals in Jiangsu Province from 2014 to 2015. Antimicrobial susceptibility testing was carried out according to a unified protocol using Kirby-Bauer method or agar dilution method. Collection of drug susceptibility results and corresponding patient data were analyzed...
July 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/28807880/-broad-spectrum-bactericidal-activity-of-a-new-bioactive-grafting-material-f18-against-clinically-important-bacterial-strains
#7
M T Souza, L A Campanini, C R Chinaglia, O Peitl, E D Zanotto, C W O Souza
Infection is the most relevant surgical complication in implant or grafting procedures. Osteomyelitis and other chronic conditions pose a constant challenge in the current practice of medicine. In this context, a grafting biomaterial that possesses antibacterial properties combined with bioactivity could have great clinical impact. Researchers at the Vitreous Materials Laboratory (LaMaV-UFSCar) recently developed a glass composition, F18, which presents an improved workability range combined with high bioactivity...
August 11, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28804019/pseudomonas-aeruginosa-auto-inducer3-oxo-c12-hsl-exerts-bacteriostatic-effect-and-inhibits-staphylococcus-epidermidis-biofilm
#8
Pradeep Kumar Singh, Vivek Kumar Yadav, Manmohit Kalia, Suhaga Dohare, Deepmala Sharma, Vishnu Agarwal
Pseudomonas aeruginosa has evolved the 3-oxo-C12-HSL and C4-HSL based quorum sensing system which is responsible for the regulation of various virulence factors and helps to dominates over other bacterial species. Staphylococcus epidermidis has frequently been reported with P. aeruginosa while the role of C4-HSL and 3-oxo-C12-HSL on the S. epidermidis had widely been unexplored, and as per our knowledge, this is the first report on the impact of C4-HSL and 3-oxo-C12-HSL overS. epidermidis growth and biofilm...
August 10, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28803189/efficacy-of-radiant-catalytic-ionization-to-reduce-bacterial-populations-in-air-and-on-different-surfaces
#9
Krzysztof Skowron, Katarzyna Grudlewska, Joanna Kwiecińska-Piróg, Grzegorz Gryń, Mścisław Śrutek, Eugenia Gospodarek-Komkowska
Air contamination by biological agents is often observed in medical or veterinary facilities and industrial plants. Bioaerosols may sediment and pose the surface contamination. Microorganisms present on them may become a source of infections among humans and food contamination. This study determined the use of oxidative gases, including ozone and peroxide, generated by the Radiant Catalytic Ionization (RCI) cell for the inactivation of Acinetobacter baumannii, Escherichia coli, Enterococcus faecalis, Pseudomonas aeruginosa, Salmonella Enteritidis, Listeria monocytogenes, Staphylococcus aureus, Streptococcus epidermidis, Bacillus subtilis, Clostridium sporogenes, Candida albicans, Aspergillus niger and Penicillium chrysogenumon in air and on different surfaces...
August 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28799523/bactericidal-activity-of-the-ti-13nb-13zr-alloy-against-different-species-of-bacteria-related-with-implant-infection
#10
John-Jairo Aguilera-Correa, Ana Conde, Maria-Angeles Arenas, Juan-Jose de-Damborenea, Miguel Marin, Antonio L Doadrio, Jaime Esteban
The Ti-6Al-4V alloy is one of the most commonly used in orthopedic surgery. Despite its advantages, there is an increasing need to use new titanium alloys with no toxic elements and improved biomechanical properties, such as Ti-13Nb-13Zr. Prosthetic joint infections (PJI) are mainly caused by Gram-positive bacteria; however, Gram-negative bacteria are a growing problem due to associated multidrug resistance. In this study, the bacterial adherence and viability on the Ti-13Nb-13Zr alloy have been compared to that of the Ti-6Al-4V alloy using 16 collection and clinical strains of bacterial species related to PJI: Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, and Pseudomonas aeruginosa...
August 11, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28796877/conjunctival-bacteria-flora-of-glaucoma-patients-during-long-term-administration-of-prostaglandin-analog-drops
#11
Shinichiro Ohtani, Kimiya Shimizu, Ryohei Nejima, Fumie Kagaya, Makoto Aihara, Takuya Iwasaki, Nobuyuki Shoji, Kazunori Miyata
Purpose: To investigate the effects of the long-term use of prostaglandin analogs for glaucoma treatment on the indigenous flora of the conjunctiva. Methods: Bacterial isolates were collected from the conjunctival sacs of 68 patients at Miyata Eye Hospital from February to September 2014, who had been receiving continuous monotherapy with prostaglandin analogs for glaucoma for at least 1 year. Minimum inhibitory concentrations of levofloxacin, gatifloxacin, moxifloxacin, cefmenoxime, tobramycin, chloramphenicol, and erythromycin against the isolates were measured to determine susceptibility...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28794307/in-vitro-antimicrobial-activities-and-mechanism-of-1-octen-3-ol-against-food-related-bacteria-and-pathogenic-fungi
#12
Chuan Xiong, Qiang Li, Shuhong Li, Cheng Chen, Zuqin Chen, Wenli Huang
1-Octen-3-ol, known as mushroom alcohol, is a natural product extracted from fungi and plants. Its antimicrobial activities against five common food-related bacteria and two pathogenic fungi were evaluated in this paper, including Staphylococcus aureus, Bacillus subtilis, Staphylococcus epidermidis, Escherichia coli, Pseudomonas aeruginosa, Fusarium tricinctum and Fusarium oxysporum. The results showed that 1-octen-3-ol had a strong antibacterial activity against the tested bacteria, especially against Gram-positive bacteria, and it can also inhibit fungal growth and spore germination...
August 8, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28794175/a-comparative-genomics-study-of-staphylococcus-epidermidis-from-orthopedic-device-related-infections-correlated-with-patient-outcome
#13
Virginia Post, Llinos G Harris, Mario Morgenstern, Leonardos Mageiros, Matthew D Hitchings, Guillaume Méric, Ben Pascoe, Samuel K Sheppard, R Geoff Richards, T Fintan Moriarty
Staphylococcus epidermidis has emerged as an important opportunistic pathogen causing orthopedic device-related infections (ODRIs). This study investigated the association of genome variation and phenotypic features of the infecting S. epidermidis isolate with the clinical outcome of the infected patient. S. epidermidis isolates were collected from 104 patients with ODRI. Their clinical outcome was evaluated, after an average of 26 months, as either "cured" or "not cured". The isolates were tested for antibiotic susceptibility and biofilm formation...
August 9, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28790237/-prophylactic-effectiveness-of-vacuum-assisted-closure-for-high-risk-patients-undergoing-cardiovascular-surgery-through-median-sternotomy
#14
Ippei Takazawa, Yoshio Misawa, Satoshi Uesugi, Akira Sugaya, Hirohiko Akutsu, Souki Kurumisawa, Hirotaka Satoh, Arata Muraoka, Kei Aizawa, Shinichi Ohki, Koji Kawahito
Vacuum-assisted closure(VAC) therapy is mainly used for tissue defects. VAC therapy can remove exudate that could impair the healing process. We applied VAC therapy in patients considered at high risk of surgical site infection who underwent cardiovascular surgery via standard median sternotomy. Risk factors included advanced heart failure, obesity, diabetes mellitus, steroid administration, immunosuppressant administration, and chronic renal failure, etc. VAC therapy was used in 134 patients. Only 3 of these patients (2...
August 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28782713/in-vitro-activity-of-alpha-viniferin-isolated-from-the-roots-of-carex-humilis-against-mycobacterium-tuberculosis
#15
Hoonhee Seo, Mijung Kim, Sukyung Kim, Hafij Al Mahmud, Md Imtiazul Islam, Kung-Woo Nam, Myoung-Lae Cho, Hyun-Sook Kwon, Ho-Yeon Song
This study explores the antitubercular activity of α-viniferin, a bioactive phytochemical compound obtained from Carex humilis. α-Viniferin was active against both drug-susceptible and -resistant strains of Mycobacterium tuberculosis at MIC50s of 4.6 μM in culture broth medium and MIC50s of 2.3-4.6 μM inside macrophages and pneumocytes. In combination with streptomycin and ethambutol, α-viniferin exhibited an additive effect and partial synergy, respectively, against M. tuberculosis H37Rv. α-Viniferin also did not show cytotoxicity in any of the cell lines tested up to a concentration of 147 μM, which gives this compound a selectivity index of >32...
August 4, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28782240/electrophoretic-deposition-of-mgo-nanoparticles-imparts-antibacterial-properties-to-poly-l-lactic-acid-for-orthopedic-applications
#16
Daniel J Hickey, Divya Muthusamy, Thomas J Webster
Bacterial infection of implanted biomaterials is a serious problem that increases health care costs and negatively affects a considerable fraction of orthopedic procedures. In this field, magnesium oxide nanoparticles (MgO NPs) have emerged as a promising material to combat bacterial infection while maintaining or improving bone cell functions. Here, MgO NPs were electrophoretically deposited onto poly-L-lactic acid (PLLA) sheets to achieve a coating of highly exposed MgO NPs that directly influenced cell-substrate interactions at short time scales...
August 7, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28782178/staphylococcal-biofilm-gene-expression-on-biomaterials-a-methodological-study
#17
Annika Juhlin, Sara Svensson, Peter Thomsen, Margarita Trobos
The combination of increased healthcare access, universal aging, and infallible therapy demands, synergistically drive the need for the development of biomaterial technologies that mitigate the challenge of biomaterial-associated infections (BAI). Staphylococcus epidermidis and Staphylococcus aureus account for the majority of BAI due to their ability to accumulate in adherent multilayered biofilm. This investigation details the development of gene expression assays to evaluate the genetic processes of attachment, accumulation, maturation, and dispersal phases on biomaterials in vitro, while abiding by the Minimum Information for Publication of Quantitative Real-Time PCR Experiments (MIQE) guidelines...
August 7, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28768998/synthesis-and-biological-evaluation-of-novel-thioether-pleuromutilin-derivatives
#18
Shuhua Mu, Huixian Liu, Lifang Zhang, Xiaoyang Wang, Feiqun Xue, Yue Zhang
To develop new pleuromutilin derivatives as veterinary antibiotic medicines, we designed and synthesized a series of new thioether pleuromutilin derivatives possessing acylthiazolyl moiety based on previously designed derivatives. The antibacterial properties of the prepared pleuromutilin derivatives were assessed in vitro by the broth dilution method against five kinds of bacteria and the mycoplasma Mycoplasma gallisepticum (MG). All of the tested compounds displayed moderate to good antibacterial activity to methicillin-sensitive Staphylococcus aureus (MSSA), methicillin-sensitive Staphylococcus epidermidis (MSSE), methicillin-resistant S...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28763905/-analysis-of-drug-resistance-of-acinetobacter-baumannii-in-wound-of-children-with-traffic-injury-and-its-relationship-with-antibiotic-use
#19
S Liu, C Wang, Y X Fu
Objective: To know the drug resistance of Acinetobacter baumannii (AB) in wound of children with traffic injury and its relationship with antibiotic use. Methods: Wound exudate of 226 children with traffic injury admitted to our unit from January 2010 to December 2015 were collected. API bacteria identification panels and fully automatic microbiological identification system were used to identify pathogens. Kirby-Bauer paper disk diffusion method was used to detect the drug resistance of pathogens to 18 antibiotics including amoxycillin/clavulanic acid, piperacillin/tazobactam, and imipenem...
July 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28760894/first-detailed-genetic-characterization-of-the-structural-organization-of-type-iii-arginine-catabolic-mobile-elements-acmes-harbored-by-staphylococcus-epidermidis-using-whole-genome-sequencing
#20
Brenda A McManus, Aoife M O'Connor, Peter M Kinnevey, Michael O'Sullivan, Ioannis Polyzois, David C Coleman
The type III arginine catabolic mobile element (ACME) was detected in three Staphylococcus epidermidis oral isolates recovered from separate patients (one healthy, one healthy with dental implants and one with periodontal disease) based on ACME-arc operon and -opp3 operon directed PCR. These isolates were subjected to whole genome sequencing to characterize the precise structural organization of ACME III for the first time and also revealed that all three isolates were the same sequence type, ST329.
July 31, 2017: Antimicrobial Agents and Chemotherapy
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