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https://www.readbyqxmd.com/read/29783252/the-analytical-prognosis-of-the-susceptibility-to-aminoglycosides-and-doxycycline-inacinetobacter-baumanniiisoolated-from-burns-of-intensive-care-unit-patients
#1
Vasyl I Nahaichuk, Oleksandr A Nazarchuk, Neonila I Osadchuk, Dmytro V Dmytriiev, Halyna H Nazarchuk
OBJECTIVE: Introduction: Clinical strains of A.baumannii are becoming highly important in hospital-acquired infections, especially because of their association with low susceptibility to antibiotics, which requires in-depth study with a prognostic determination of the dynamics of antimicrobial efficacy of antibiotics. The aim was to investigate of prognostic models of aminoglycoside antibiotics effectiveness on the basis of the mathematical analysis of real susceptibility of A.baumannii clinical strains, isolated from patients in BICU...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29783096/all-roads-lead-to-rome-towards-understanding-different-avenues-of-tolerance-to-huanglongbing-in-citrus-cultivars
#2
Nabil Killiny, Shelley E Jones, Yasser Nehela, Faraj Hijaz, Manjul Dutt, Frederick G Gmitter, Jude W Grosser
Citrus tolerance to huanglongbing could result from tolerance to the pathogen Candidatus Liberibacter asiaticus (CLas) and/or to its vector Diaphorina citri. Field observations and greenhouse-controlled studies showed that some citrus cultivars were more tolerant than others. However, the mechanism(s) behind the tolerance has not been determined yet. Using GC-MS, we investigated the volatile organic compounds (VOCs) and the non-volatile metabolite profiles of two tolerant citrus cultivars- Australian finger lime, 'LB8-9' Sugar Belle® mandarin hybrid, and a recently released mandarin hybrid 'Bingo'...
May 18, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29783052/the-effect-of-the-supporting-electrolyte-on-the-electrooxidation-of-enrofloxacin-using-a-flow-cell-with-a-bdd-anode-kinetics-and-follow-up-of-oxidation-intermediates-and-antimicrobial-activity
#3
Jussara F Carneiro, José M Aquino, Adilson J Silva, Juliana C Barreiro, Quezia B Cass, Romeu C Rocha-Filho
The role of the supporting electrolyte - SE (Na2 SO4 ; NaCl; Na2 CO3 ; NaNO3 ; Na3 PO4 - 0.1 M ionic strength) in the galvanostatic (10 mA cm-2 ) electrochemical degradation of the fluoroquinolone antibiotic enrofloxacin (ENRO; 100 mg L-1 ) using a filter-press flow cell with a boron-doped diamond anode was investigated (flow rate, solution volume, and temperature were kept fixed at 420 L h-1 , 1.0 L, and 25 °C, respectively). The electrochemical degradation performance with the different SEs was assessed by following up [ENRO], total organic carbon concentration (TOC), oxidation intermediates (detected by LC and LC-QqTOF), and antimicrobial activity towards Escherichia coli as the electrolyses progressed...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29783044/tomato-type-and-post-treatment-water-rinse-affect-efficacy-of-acid-washes-against-salmonella-enterica-inoculated-on-stem-scars-of-tomatoes-and-product-quality
#4
Xuetong Fan, Joshua B Gurtler, Kimberly J B Sokorai
A study was conducted to evaluate the effects of post-treatment rinsing with water on the inactivation efficacy of acid treatments against Salmonella inoculated onto stem scar areas of two types of tomatoes. In addition, impact on fruit quality was investigated during 21 days post-treatment storage at 10 °C. A four-strain cocktail of Salmonella enterica (S. Montevideo, S. Newport, S. Saintpaul, and S. Typhimurium) was inoculated onto stem scar areas of grape and large round tomatoes. The inoculated fruits were then treated for 2 min with the following solutions: water, 2% lactic acid +2% acetic acid +2% levulinic acid, 1...
May 12, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29782987/chitin-silk-fibroin-tio-2-bio-nanocomposite-as-a-biocompatible-wound-dressing-bandage-with-strong-antimicrobial-activity
#5
Mojtaba Ghanbari Mehrabani, Ramin Karimian, Rasul Rakhshaei, Farzaneh Pakdel, Hosein Eslami, Vahid Fakhrzadeh, Mahdi Rahimi, Roya Salehi, Hossein Samadi Kafil
Interconnected microporous biodegradable and biocompatible chitin/silk fibroin/TiO2 nanocomposite wound dressing with high antibacterial, blood clotting and mechanical strength properties were synthesized using freeze-drying method. The prepared nanocomposite dressings were characterized using SEM, FTIR, and XRD analysis. The prepared nanocomposite dressings showed high porosity above 90% with well-defined interconnected porous construction. Swelling and water uptake of the dressing were 93%, which is great for wound dressing applications...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29782954/comparison-between-disk-diffusion-and-agar-dilution-methods-to-determine-in-vitro-susceptibility-of-corynebacterium-spp-clinical-isolates-and-update-of-their-susceptibility
#6
Claudia Barberis, Eugenia Sandoval, Carlos Hernán Rodriguez, María Soledad Ramírez, Angela Famiglietti, Marisa Almuzara, Carlos Vay
INTRODUCTION: Although Corynebacterium species are part of the skin and mucous membranes microbiota, human infections caused by Corynebacterium spp. have been reported and the multidrug resistance pattern of the recovered isolates was emphasized. Due to the usefulness of disk diffusion in daily practice, the purpose of this work was to compare disk diffusion against agar dilution to determine disk diffusion breakpoints and to review the antimicrobial susceptibility of the most frequent Corynebacterium spp...
May 18, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29782890/novel-dental-adhesive-resin-with-crack-self-healing-antimicrobial-and-remineralization-properties
#7
Shichao Yue, Junling Wu, Qiang Zhang, Ke Zhang, Michael D Weir, Satoshi Imazato, Yuxing Bai, Hockin H K Xu
OBJECTIVES: Secondary caries at the tooth-restoration margins is a primary reason for restoration failure. Cracks at the margins lead to leakage which can trap bacteria, producing acids to cause caries. To date, there has been no report on developing an adhesive resin that has self-healing, antibacterial and remineralizing capabilities. The objectives of this study were to: (1) develop the first self-healing adhesive with antimicrobial and remineralizing capabilities, and (2) investigate the effects of incorporating microcapsules, dimethylaminohexadecyl methacrylate (DMAHDM) and nanoparticles of amorphous calcium phosphate (NACP) for the first time...
May 18, 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29782818/antimicrobial-activity-profiles-of-amphiphilic-xanthone-derivatives-are-a-function-of-their-molecular-oligomerization
#8
Jun-Jie Koh, Shuimu Lin, Yang Bai, Wendy Wan Ling Sin, Thet Tun Aung, Jianguo Li, Verma Chandra, Konstantin Pervushin, Roger W Beuerman, Shouping Liu
Currently, membrane-targeting small antimicrobial peptidomimetics (SAP) are important in antibiotic development because bacteria appear to develop resistance to these surface-active compounds less readily. However, the molecular membrane-targeting action of SAPs has received little attention. In this study, we investigated the effect of oligomerization of amphiphilic xanthone, a model SAP, on its antimicrobial properties against both Gram-positive and Gram-negative bacteria. First, oligomer formation by an amphiphilic xanthone, compound 2 (also coded as AM052), was investigated via solution-state nuclear magnetic resonance (NMR) spectroscopy...
May 18, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29782792/antimicrobial-properties-of-2d-mno-2-and-mos-2-nanomaterials-vertically-aligned-on-graphene-materials-and-ti-3-c-2-mxene
#9
Farbod Alimohammadi, Mohammad Sharifian Gh, Nuwan H Attanayake, Akila C Thenuwara, Yury Gogotsi, Babak Anasori, Daniel R Strongin
Two dimensional (2D) nanomaterials have attracted considerable attention in biomedical and environmental applications due to their antimicrobial activity. In the interest of investigating the primary antimicrobial mode-of-action of 2D nanomaterials, we studied the antimicrobial properties of MnO2 and MoS2 , toward Gram-positive and Gram-negative bacteria. Bacillus subtilis and Escherichia coli bacteria were treated individually with 100 μg/mL of randomly oriented and vertically aligned nanomaterials for 3 h in the dark...
May 21, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29782697/fewer-defects-in-the-surface-slows-the-hydrolysis-rate-decreases-the-ros-generation-potential-and-improves-the-non-ros-antimicrobial-activity-of-mgo
#10
Nemanja Anicˇić, Marija Vukomanović, Tilen Koklicˇ, Danilo Suvorov
Magnesium oxide (MgO) is recognised as exhibiting a contact-based antibacterial activity. However, a comprehensive study of the impact of atomic-scale surface features on MgO's antibacterial activity is lacking. In this study, the nature and abundance of the native surface defects on different MgO powders are thoroughly investigated. Their impacts on the hydrolysis kinetics, antibacterial activity against Escherichia coli (ATCC 47076), Staphylococcus epidermidis and Pseudomonas aeruginosa and the reactive oxygen species (ROS) generation potential are determined and explained...
May 21, 2018: Small
https://www.readbyqxmd.com/read/29782686/promotion-and-inhibition-of-synchronous-glycolytic-oscillations-in-yeast-by-chitosan
#11
Kenichi Shibata, Takashi Amemiya, Yu Kawakita, Kohei Obase, Kiminori Itoh, Masahiro Takinoue, Satoshi Nakata, Tomohiko Yamaguchi
Synchronous rhythmic activities play crucial roles in diverse biological systems. Glycolytic oscillations in yeast cells have been studied for 50 years with the aim of elucidating the mechanisms underlying the intracellular oscillations and their synchronization. We investigated the effects of chemical disturbances on the individual and collective glycolytic oscillations in yeast cells encapsulated in alginate microparticles, and demonstrated that the addition of chitosan, an antimicrobial agent, decreased the duration of these oscillations...
May 21, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29782464/use-of-probiotics-in-the-prevention-of-nosocomial-infections
#12
Ivana Trivić, Iva Hojsak
Nosocomial, hospital-acquired or health care-associated infections occur worldwide, affecting both developed and developing countries. This results in a prolonged hospital stay, increased antimicrobial resistance, increased mortality rate, and significant financial burden on the health care system. Routine preventive measures have led to the decrease in infection spreading; however, it cannot successfully prevent all of them, making a place for the development of new strategies, including probiotics. The aim of this review was to summarize available evidence of the role of probiotics in the prevention of nosocomial infections in children...
May 18, 2018: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29782437/skin-injuries-and-chlorhexidine-gluconate-based-antisepsis-in-early-premature-infants-a-case-report-and-review-of-the-literature
#13
Valentina Vanzi, Rosanna Pitaro
Early premature infants are subjected to many invasive procedures in neonatal intensive care units, and effective skin antisepsis is an essential step in caring for these vulnerable patients. Nevertheless, preterm infants have an anatomically and physiologically immature skin and preserving their skin integrity is essential to avoid the risk of local and systemic complications. Skin particularities of newborns reduce the list of available antiseptics in neonatology. Chlorhexidine gluconate (CHG) has excellent antiseptic properties and its antimicrobial efficacy cannot be understated, but there is great concern about its use for premature infants, referring to the risk of development skin injuries, such as skin erythema, burns, and blisters...
May 17, 2018: Journal of Perinatal & Neonatal Nursing
https://www.readbyqxmd.com/read/29782237/effect-of-porins-and-bla-kpc-expression-on-activity-of-imipenem-with-relebactam-in-klebsiella-pneumoniae-can-antibiotic-combinations-overcome-resistance
#14
Gregory Balabanian, Michael Rose, Nyla Manning, David Landman, John Quale
Imipenem with relebactam is a novel β-lactam-β-lactamase inhibitor that has activity against most KPC-producing Enterobacteriaceae. Using 10 isolates of KPC-possessing Klebsiella pneumoniae, we assessed the relationship between imipenem-relebactam minimum inhibitory concentrations (MICs) and mechanisms known to contribute to antimicrobial resistance. The effect of adding a second agent was assessed by time-kill experiments. Mutations affecting the genes encoding porins ompK35 and ompK36 and identification of β-lactamases were assessed by PCR...
May 21, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29781997/antimicrobial-peptides-produced-by-selective-pressure-incorporation-of-non-canonical-amino-acids
#15
Jessica H Nickling, Tobias Baumann, Franz-Josef Schmitt, Maike Bartholomae, Oscar P Kuipers, Thomas Friedrich, Nediljko Budisa
Nature has a variety of possibilities to create new protein functions by modifying the sequence of the individual amino acid building blocks. However, all variations are based on the 20 canonical amino acids (cAAs). As a way to introduce additional physicochemical properties into polypeptides, the incorporation of non-canonical amino acids (ncAAs) is increasingly used in protein engineering. Due to their relatively short length, the modification of ribosomally synthesized and post-translationally modified peptides by ncAAs is particularly attractive...
May 4, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29781787/evaluating-the-duration-of-prophylactic-post-operative-antibiotic-agents-after-open-reduction-internal-fixation-for-closed-fractures
#16
Brett D Crist, Lasun O Oladeji, Gregory J Della Rocca, David A Volgas, James P Stannard, David D Greenberg
BACKGROUND: The importance of timely pre-operative antibiotic agents for effective surgical prophylaxis has been established but the optimal duration of antimicrobial coverage post-operatively has not yet been defined clearly. The purpose of this study was to determine if prophylactic post- operative cefazolin for 23 hours decreases the risk of surgical site infection (SSI) after open reduction internal fixation (ORIF) of closed extremity fractures. PATIENTS AND METHODS: After Institutional Reviews Board approval, patients undergoing ORIF of closed extremity fractures who had a planned post-operative stay of at least 23 hours were randomly assigned to either receive 23 hours of cefazolin or a placebo...
May 21, 2018: Surgical Infections
https://www.readbyqxmd.com/read/29781595/-results-of-the-implementation-of-an-antimicrobial-stewardship-program-in-the-gerencia-de-atenci%C3%A3-n-integrada-of-alcazar-de-san-juan-castilla-la-mancha
#17
M A Asencio Egea, O Herráez Carrera, M Huertas Vaquero, H D Patiño Ortega, M Franco Huerta, P Alcázar Carmona, M C Conde García, C Muñoz-Cuevas, C Román Ortiz, J Gaitán Pitera, R Carranza González, J R Barberá
OBJECTIVE: Our aim was to evaluate the efficiency of an ASP after its implementation in 2016 in a Spanish hospital quality system. METHODS: Efficiency of the ASP was measured by process and outcome indicators at the level of the patient's quality of life, antimicrobial consumption and percentage of resistance to them during the 2016-2017 period. In 2017, the failures mode and effects analysis (FMEA) methodology was applied. An annual satisfaction survey was conducted...
May 18, 2018: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/29781542/diversity-of-staphylococcus-pseudintermedius-in-carriage-sites-and-skin-lesions-of-dogs-with-superficial-bacterial-folliculitis-potential-implications-for-diagnostic-testing-and-therapy
#18
Rikke Friis Larsen, Lene Boysen, Lisbeth Rem Jessen, Luca Guardabassi, Peter Damborg
BACKGROUND: Staphylococcus pseudintermedius is genotypically diverse within the canine population and multiple strains may colonize individual dogs at any given time. If multiple strains with distinct antimicrobial resistance profiles are present in superficial bacterial folliculitis (SBF), sampling a single skin lesion for culture and antimicrobial susceptibility testing (AST) might be inadequate to select effective therapy. HYPOTHESIS/OBJECTIVES: To investigate S...
May 21, 2018: Veterinary Dermatology
https://www.readbyqxmd.com/read/29781320/correction-to-sodium-trimetaphosphate-and-hexametaphosphate-impregnated-with-silver-nanoparticles-characteristics-and-antimicrobial-efficacy
#19
(no author information available yet)
No abstract text is available yet for this article.
March 2018: Biofouling
https://www.readbyqxmd.com/read/29781307/anti-pseudomonas-aeruginosa-activity-of-hemlock-conium-maculatum-apiaceae-essential-oil
#20
Michela Di Napoli, Mario Varcamonti, Adriana Basile, Maurizio Bruno, Filippo Maggi, Anna Zanfardino
Conium maculatum is a nitrophilous weed belonging to the Apiaceae family and occurring in hedgerows, pastures, waste ground, along rivers and roadsides. Little is known on the chemistry and bioactivity of other secondary metabolites occurring in the plant. In the present work, we have analysed the chemical composition and antimicrobial activity of the essential oils hydrodistilled from leaves and inflorescenes of C. maculatum growing in Sicily, Italy. The composition of essential oils was achieved by gas chromatography-mass spectrometry (GC-MS) analysis, whereas the inhibitory effects on the growth of two Gram negative strains, namely Escherichia coli and Pseudomonas aeruginosa were assessed by two different analysis...
May 21, 2018: Natural Product Research
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