Search results for "S.epidermidis"
showing 10 items of 46 documents
Novel Penicillin-Type Analogues Bearing a Variable Substituted 2-Azetidinone Ring at Position 6: Synthesis and Biological Evaluation
2015
The synthesis and the biological activity of novel semi-synthetic β-lactam compounds containing an azetidinone moiety joined to the amino-nitrogen of the (+)-6-aminopenicillanic acid (6-APA) as new antibacterial agents is reported. The synthesized compounds were screened for their in vitro antimicrobial activity against a panel of Gram positive and Gram negative pathogens and environmental bacteria. Tested compounds displayed good antimicrobial activity against all tested Gram positive bacteria and for Staphylococcus aureus and Staphylococcus epidermidis antimicrobial activity resulted higher than that of the reference antibiotic. Additionally, in vitro cytotoxic screening was also carried …
Neonatal osteomyelitis of the talus due to methicillin-resistant Staphylococcus epidermidis
2013
Acute osteomyelitis is a relatively rare disorder in the neonatal period, with considerable morbidity and mortality. Early diagnosis and prompt treatment are essential for a successful outcome. In this report we present a case of acute osteomyelitis of the talus due to methicillin-resistant Staphylococcus epidermidis, observed in a 30-day-old infant.
ANTIMICROBIAL AND ANTISTAPHYLOCOCCAL BIOFILM ACTIVITY FROM THE SEA URCHIN PARACENTROTUS LIVIDUS
2009
Aims: Staphylococcal biofilm-associated infections are resistant to conventional antibiotics. Consequently, new agents are needed to treat them. With this aim, we focused on the effector cells (coelomocytes) of the sea urchin Paracentrotus lividus immune system. Methods and Results: We tested the activity of the 5-kDa peptide fraction of the cytosol from coelomocytes (5-CC) against a group of Gram-positive, Gram-negative bacteria and fungi. We determined minimal inhibitory concentrations (MICs) ranging from 253.7 to 15.8 mg ml(-1). We observed an inhibitory activity and antibiofilm properties of 5-CC against staphylococcal biofilms of reference strains Staphylococcus epidermidis DSM 3269 an…
Hydroxypropylcellulose as a novel green reservoir for the synthesis, stabilization, and storage of silver nanoparticles
2015
Muhammad Ajaz Hussain,1 Abdullah Shah,1 Ibrahim Jantan,2 Muhammad Raza Shah,3 Muhammad Nawaz Tahir,4 Riaz Ahmad,5 Syed Nasir Abbas Bukhari2 1Department of Chemistry, University of Sargodha, Sargodha, Pakistan; 2Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur, Malaysia; 3International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan; 4Institute of Inorganic and Analytical Chemistry, Johannes Guttenberg University, Duesbergweg, Mainz, Germany; 5Centre for Advanced Studies in Physics (CASP), GC University, Lahore, Pakistan Abstract: Polysaccharides are attracting the vigil eye of…
Pyrrolomycins as potential anti-staphylococcal biofilms agents
2010
With the goal of discovering new anti-infective agents active against microbial biofilms, this investigation focused on some natural pyrrolomycins, a family of halogenated pyrrole antibiotics. In this study the anti-staphylococcal biofilm activity of pyrrolomycins C, D, F1, F2a, F2b, F3 and of the synthesized related compounds I, II, III were investigated. The susceptibility of six staphylococcal biofilms was determined by methyltiazotetrazolium staining. Most of the compounds were active at concentrations of 1.5 microg ml(-1) with significant inhibition percentages. A few of the compounds were active at the lowest screening concentration of 0.045 microg ml(-1). The population log reduction…
In vitro anti-biofilm activity of Boswellia spp. oleogum resin essential oils
2009
Aims: To evaluate the anti-biofilm activity of the commercially available essential oils from two Boswellia species. Methods and Results: The susceptibility of staphylococcal and Candida albicans biofilms was determined by methyltiazotetrazolium (MTT) staining. At concentrations ranging from 217·3 μg ml−1 (25% v/v) to 6·8 μg ml−1 (0·75% v/v), the essential oil of Boswellia papyrifera showed considerable activity against both Staphylococcus epidermidis DSM 3269 and Staphylococcus aureus ATCC 29213 biofilms. The anti-microbial efficacy of this oil against S. epidermidis RP62A biofilms was also tested using live/dead staining in combination with fluorescence microscopy, and we observed that …
Staphylococcus epidermidis un to rezistence pret antibakteriālajām vielām
2016
Staphylococcus epidermidis ir vieni no biežākajiem nozokomiālo infekciju un bakterēmijas ierosinātājiem. S.epidermidis bieži ir meticilīnrezistenti un tas nozīmē, ka baktērijas ir rezistentas pret klasiskajām β – laktāmu antibakteriālajām vielām. Meticilīnrezistenci nosaka mecA gēns , kurš ir integrēts baktērijas DNS. Baktēriju rezistence būtiski ietekmē arī infekciju terapijas izvēli. Darba mērķis ir izpētīt Staphylococcus epidermidis rezistenci pret antibakteriālajiem preparātiem no klīniskajiem materiāliem izolētajos paraugos. Pētījumā tika noskaidrots , ka S.epidermidis uzrādīja augstu rezistenci pret ampicilinu – 17 gadījumos ( 83% ), un arī pret eritromicīnu – 37 gadījumi ( 74% ). 31 …
No perifēro vēnu katetru uzsējumiem izdalīto Staphylococcus epidermidis bioplēvju veidošana un jutība pret antibakteriālajiem līdzekļiem
2015
Mūsdienās Staphylococcus epidermidis ir vieni no visbiežāk izolētajiem nozokomiālo infekciju izraisītājiem pacientu grupā ar tādiem riska faktoriem kā novājināta imūnsistēma un implantētām medicīniskajām ierīcēm. Visbūtiskākā ar svešķermeņiem saistīto infekciju patoģenēzē ir šo mikroorganismu spēja kolonizēt medicīnisko ierīču abiotiskās virsmas, formējot bioplēvi, kas sastāv no daudzslāņu šūnu klasteriem, iekļautiem ekstracelulārajā gļotu substancē un ir saistīta ar šo baktēriju rezistenci pret antibakteriālajiem līdzekļiem, padarot to izraisītās slimības grūti ārstējamas. Pētījuma mērķis: Analizēt no perifēro vēnu katetru uzsējumiem izdalīto Staphylococcus epidermidis bioplēvju veidošanas…
Control of biofilm formation by poly-ethylene-co-vinyl acetate films incorporating nisin.
2010
The aim of this study was to evaluate the effect of poly-ethylene-co-vinyl acetate (EVA) films incorporating different concentrations (0.1%, 0.5% and 1%) of nisin on the biofilm-forming ability of Listeria monocytogenes ATCC 7644, Staphylococcus aureus 815 and Staphylococ-cus epidermidis ATCC 35984. Nisin was incorporated into two grades of EVA (EVA14 and EVA28) in the melt during a common film-blowing operation. The efficacy of EVA/nisin films was evaluated by biofilm biomass measurements and Live/Dead staining in combination with fluorescence microscopy. In order to evaluate whether the nisin incorporation could modify the film surface properties, contact angle measurements and scanning e…
Staphyloccocus epidermidis virulences faktoru un antibakteriālās rezistences noteikšana
2020
Darba aktualitāte: Neraugoties uz to, ka diagnosticēšanas un ārstniecības iespējas strauji attīstās, vēl joprojām aktuāla ir tēma par baktēriju rezistenci. S. epidermidis tiek uzskatīts par vienu no biežākajiem nazokomiālo infekciju ierosinātājiem. Šīs baktērijas svarīgākais virulences faktors ir biofilmas veidošanās. Ņemot vērā baktēriju īpašības, S. epidermidis izraisītās infekcijas kļūst grūti ārstējamas. Darba mērķis: Noteikt medicīnas studentu ādas mikroflorā (mikrobiota) esošos stafilokokus un identificēt S. epidermidis baktērijas, noteikt to virulences, antibakteriālo rezistenci un salīdzināt ar to stafilokoku celmu īpašībām, kas iegūti no klīniskā materiāla. Metodes un materiāli: Di…