keyword
MENU ▼
Read by QxMD icon Read
search

Antibiotic resistant Staphylococcus

keyword
https://www.readbyqxmd.com/read/28096484/evolutionary-dynamics-of-pandemic-methicillin-sensitive-staphylococcus-aureus-st398-and-its-international-spread-via-routes-of-human-migration
#1
Anne-Catrin Uhlemann, Paul R McAdam, Sean B Sullivan, Justin R Knox, Hossein Khiabanian, Raul Rabadan, Peter R Davies, J Ross Fitzgerald, Franklin D Lowy
: Methicillin-susceptible Staphylococcus aureus (MSSA) accounts for the majority of S. aureus infections globally, and yet surprisingly little is known about its clonal evolution. We applied comparative whole-genome sequencing (WGS) analyses to epidemiologically and geographically diverse ST398-MSSA, a pandemic lineage affecting both humans and livestock. Bayesian phylogenetic analysis predicted divergence of human-associated ST398-MSSA ~40 years ago. Isolates from Midwestern pigs and veterinarians differed substantially from those in New York City (NYC)...
January 17, 2017: MBio
https://www.readbyqxmd.com/read/28095918/anti-staphylococcal-activity-resulting-from-epithelial-lining-fluid-elf-concentrations-of-amikacin-inhale-administered-via-the-pulmonary-drug-delivery-system
#2
Islam M Ghazi, Mordechai Grupper, David P Nicolau
BACKGROUND: Amikacin inhale (BAY41-6551), a unique drug-device combination of a specially formulated drug solution and a pulmonary drug delivery system device (AMK-I) is currently under phase III study as an adjunctive therapy to IV antibiotics for the treatment of Gram-negative pneumonia in mechanically ventilated patients. While the epidemiology of nosocomial pneumonia is predominated by Gram-negative pathogens such as Pseudomonas aeruginosa and the Enterobacteriaceae, Staphylococcus aureus is increasingly recognized as a pathogen of concern for these pulmonary based infections...
January 17, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28090280/in-vitro-activity-of-linezolid-in-combination-with-photodynamic-inactivation-against-staphylococcus-aureus-biofilms
#3
Nasim Kashef, Mahboobeh Akbarizare, Mohammad Reza Razzaghi
BACKGROUND: Biofilm infections are a major challenge in medical practice. Bacteria that live in a biofilm phenotype are more resistant to both antimicrobial therapy and host immune responses compared to their planktonic counterparts. So, there is need for new therapeutic strategies to combat these infections. A promising approach [known as Photodynamic Inactivation (PDI)] to kill bacteria growing as biofilms uses light in combination with a photosensitizer to induce a phototoxic reaction which produces reactive oxygen species that can destroy lipids and proteins causing cell death...
January 2017: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/28088472/cholesterol-and-ergosterol-affect-the-activity-of-staphylococcus-aureus-antibiotic-efflux-pumps
#4
S R Tintino, C D M Oliveira-Tintino, F F Campina, M S Costa, R P Cruz, R L S Pereira, J C Andrade, E O Sousa, J P Siqueira-Junior, H D M Coutinho, T C Leal-Balbino, V Q Balbino
The aim of this study is to evaluate the effect of ergosterol on steroids and cholesterol efflux pumps in multidrug resistant strains of S. aureus. Were used RN4220 harboring plasmid pUL5054, which carries the gene encoding the MsrA macrolide efflux protein; and IS-58, which possesses the TetK tetracycline efflux protein; 1199B resists hydrophilic fluoroquinolones via a NorA-mediated mechanism and wild strain 1199B. The Minimal Inhibitory Concentration (MIC) was determined and the evaluation of possible inhibition of efflux pumps by reduction of MIC...
January 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28087484/inhibition-of-bacterial-adhesion-and-biofilm-formation-by-dual-functional-textured-and-nitric-oxide-releasing-surfaces
#5
Li-Chong Xu, Yaqi Wo, Mark E Meyerhoff, Christopher A Siedlecki
: In separate prior studies, physical topographic surface modification or nitric oxide (NO) release has been demonstrated to each be an effective approach to inhibit and control bacterial adhesion and biofilm formation on polymeric surfaces. Such approaches can prevent biomaterial-associated infection without causing the antibiotic resistance of the strain. In this work, both techniques were successfully integrated and applied to a polyurethane (PU) biomaterial surface that bears ordered pillar topographies (400/400 nm and 500/500 nm patterns) at the top surface and a S-nitroso-N-acetylpenicillamine (SNAP, NO donor) doped sub-layer in the middle, via a soft lithography two-stage replication process...
January 10, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28087406/erythrocyte-membrane-coated-nanogel-for-combinatorial-antivirulence-and-responsive-antimicrobial-delivery-against-staphylococcus-aureus-infection
#6
Yue Zhang, Jianhua Zhang, Wangsong Chen, Pavimol Angsantikul, Kevin A Spiekermann, Ronnie H Fang, Weiwei Gao, Liangfang Zhang
We reported an erythrocyte membrane-coated nanogel (RBC-nanogel) system with combinatorial antivirulence and responsive antibiotic delivery for the treatment of methicillin-resistant Staphylococcus aureus (MRSA) infection. RBC membrane was coated onto the nanogel via a membrane vesicle templated in situ gelation process, whereas the redox-responsiveness was achieved by using a disulfide bond-based crosslinker. We demonstrated that the RBC-nanogels effectively neutralized MRSA-associated toxins in extracellular environment and the toxin neutralization in turn promoted bacterial uptake by macrophages...
January 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28087318/etiologies-of-community-onset-urinary-tract%C3%A2-infections-requiring-hospitalization-and%C3%A2-antimicrobial-susceptibilities-of%C3%A2-causative-microorganisms
#7
Chih-Chien Chiu, Tzu-Chao Lin, Rui-Xin Wu, Ya-Sung Yang, Po-Jen Hsiao, Yi Lee, Jung-Chung Lin, Feng-Yee Chang
BACKGROUND: Community-onset urinary tract infections (CoUTIs) are the most common bacterial infections, and a decline in antibiotic susceptibility causes many clinical challenges. Adequate empiric antibiotic treatment can decrease unnecessary hospital stays and complications, while reducing the antimicrobial resistance progression. METHODS: From October 2014 to April 2015, we retrospectively enrolled patients who were at least 18 years old and required hospitalization for CoUTIs...
December 18, 2016: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28081583/-early-results-of-adjuvant-topical-treatment-of-recurrent-osteomyelitis-with-absorbable-antibiotic-carriers
#8
Y Gramlich, G Walter, J Gils, R Hoffmann
Background Treatment of musculoskeletal infections principally consists of radical surgical debridement and systemic administration of antibiotics. Additional local antibiotic therapy is not yet generally established, and lacks evidence-based proof of efficacy. Nonetheless, there are a variety of practical approaches, as most specialised departments are unwilling to forego this option. The established polymethylmetacrylate (PMMA) carrier system has a number of practical disadvantages. This has led to the increased use of absorbable carrier systems, and those based on calcium sulphate have given particularly encouraging results...
January 12, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28079631/the-role-of-methicillin-resistant-staphylococcus-aureus-in-skin-and-soft-tissue-infections
#9
Matteo Bassetti, Alessia Carnelutti, Elda Righi
PURPOSE OF REVIEW: Methicillin-resistant Staphylococcus aureus (MRSA) has become a major public health issue worldwide over the last years. MRSA is frequently implicated in the development of skin and soft tissue infections, leading to significant increases in morbidity, mortality and overall healthcare costs. RECENT FINDINGS: In order to face the threat of MRSA, major changes in clinical management of skin and soft tissue infections are required. The identification of populations at risk for the acquisition of infections due to MRSA, together with the improvement of the diagnostic techniques, is paramount...
January 12, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28078661/role-of-cytokines-in-host-defense-against-staphylococcus-aureus-skin-infection
#10
REVIEW
Guosheng Wu, Banghui Zhu, Xudong Hong, Pengfei Luo, Zhaofan Xia
Wound infection caused by Staphylococcus aureus (S. aureus) is a critical clinical problem due to long hospitalization times, significant morbidity and mortality, as well as considerable medical resource consumption. With the emergence of methicillin-resistant S. aureus (MRSA) strains, current antibiotic treatments are becoming ineffective in combatting S. aureus infection. Thus, a novel therapeutic strategy is required. Recent studies discovered that several cytokines in the infected wound area play protective roles against S...
January 12, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28077586/redeploying-%C3%AE-lactam-antibiotics-as-a-novel-antivirulence-strategy-for-the-treatment-of-methicillin-resistant-staphylococcus-aureus-infections
#11
Elaine M Waters, Justine K Rudkin, Simone Coughlan, Geremy C Clair, Joshua N Adkins, Suzanna Gore, Guoqing Xia, Nikki S Black, Tim Downing, Eoghan O'Neill, Aras Kadioglu, James P O'Gara
Innovative approaches to the use of existing antibiotics is an important strategy in efforts to address the escalating antimicrobial resistance crisis. We report a new approach to the treatment of methicillin-resistant Staphylococcus aureus (MRSA) infections by demonstrating that oxacillin can be used to significantly attenuate the virulence of MRSA despite the pathogen being resistant to this drug. Using mechanistic in vitro assays and in vivo models of invasive pneumonia and sepsis, we show that oxacillin-treated MRSA strains are significantly attenuated in virulence...
January 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28074051/anti-folates-potentiate-bactericidal-effects-of-other-antimicrobial-agents
#12
Kun Li, Xu-de Wang, Shan-Shan Yang, Jing Gu, Jiao-Yu Deng, Xian-En Zhang
Synergies between sulfonamides and other antimicrobial agents have long been reported, but the reason still remains unclear. Previously, Vilchèze et al. found that, sulfamethoxazole (SMX) could potentiate the bacterialcidal activity of isoniazid (INH) and rifampin (RIF) in Mycobacterium tuberculosis. To test if this was also the case in other bacteria, the ability to potentiate bactericidal effect of RIF by SMX was evaluated in Escherichia coli, Staphylococcus aureus, Salmonella typhimurium and Mycobacterium smegmatis...
January 11, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28066954/ultrashort-self-assembling-fmoc-peptide-gelators-for-anti-infective-biomaterial-applications
#13
Alice P McCloskey, Emily R Draper, Brendan F Gilmore, Garry Laverty
Biomaterial-related infections have a significant impact on society and are a major contributor to the growing threat of antimicrobial resistance. Current licensed antibiotic classes struggle to breakdown or penetrate the exopolysaccharide biofilm barrier, resulting in sub-therapeutic concentrations of antibiotic at the surface of the biomaterial, treatment failure and increased spread of resistant isolates. This paper focuses for the first time on the ability of ultrashort Fmoc-peptide gelators to eradicate established bacterial biofilms implicated in a variety of medical device infections (Gram-positive: Staphylococcus aureus, Staphylococcus epidermidis and Gram-negative Escherichia coli, Pseudomonas aeruginosa)...
January 9, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28066112/in-vitro-effectiveness-of-triterpenoids-and-their-synergistic-effect-with-antibiotics-against-staphylococcus-aureus-strains
#14
Muhammad Hamza, Maha Nadir, Nadir Mehmood, Adeel Farooq
OBJECTIVES: The aim of this study is to evaluate the effect of four triterpenoids such as oleanolic acid, ursolic acid, cycloastragenol, and beta-boswellic acid alone and in combination with antibiotics against Staphylococcus aureus strains. MATERIALS AND METHODS: Sixteen clinical strains of S. aureus from infected wounds were isolated. Eight were methicillin-sensitive S. aureus (MSSA), and the other eight were methicillin-resistant S. aureus (MRSA). The activity was also seen in reference S...
November 2016: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/28065867/cloning-expression-purification-and-biophysical-analysis-of-two-putative-halogenases-from-the-glycopeptide-a47-934-gene-cluster-of-streptomyces-toyocaensis
#15
Tabata P Cardoso, Larissa A de Sá, Priscila Dos S Bury, Sair M Chavez-Pacheco, Marcio V B Dias
Glycopeptides are an important class of antibiotics used in the treatment of several infections, including those caused by methicillin resistant Staphylococcus aureus. Glycopeptides are biosynthesized by a Non Ribosomal Peptide Synthase (NRPS) and the resulting peptide precursors are decorated by several tailoring enzymes, such as halogenases and glycosyltransferases. These enzymes are important targets of protein engineering to produce new derivatives of known antibiotics. Herein we show the production of two putative halogenases, denominated StaI and StaK, involved in the biosynthesis of the glycopeptide A47,934 in Streptomyces toyocaensis NRRL 15,009...
January 5, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28064075/spectrally-resolved-infrared-microscopy-and-chemometric-tools-to-reveal-the-interaction-between-blue-light-470nm-and-methicillin-resistant-staphylococcus-aureus
#16
Violet V Bumah, Ebrahim Aboualizadeh, Daniela S Masson-Meyers, Janis T Eells, Chukuka S Enwemeka, Carol J Hirschmugl
Blue light inactivates methicillin-resistant Staphylococcus aureus (MRSA), a Gram-positive antibiotic resistant bacterium that leads to fatal infections; however, the mechanism of bacterial death remains unclear. In this paper, to uncover the mechanism underlying the bactericidal effect of blue light, a combination of Fourier transform infrared (FTIR) spectroscopy and chemometric tools is employed to detect the photoreactivity of MRSA and its distinctive pathway toward apoptosis after treatment. The mechanism of action of UV light and vancomycin against MRSA is also investigated to support the findings...
December 23, 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28063000/evaluation-of-loop-mediated-isothermal-amplification-for-the-rapid-identification-of-bacteria-and-resistance-determinants-in-positive-blood-cultures
#17
J Rödel, J A Bohnert, S Stoll, L Wassill, B Edel, M Karrasch, B Löffler, W Pfister
The use of molecular assays to rapidly identify pathogens and resistance genes directly from positive blood cultures (BCs) contribute to shortening the time required for the diagnosis of bloodstream infections. In this work, loop-mediated isothermal amplification (LAMP) assays have been examined for their potential use in BC diagnosis. Three different assays were applied. The commercially available eazyplex® MRSA test detects Staphylococcus aureus, S. epidermidis, mecA, and mecC. Two in-house assays [Gram-positive (GP) and Gram-negative (GN)] have been developed for the detection of streptococci, enterococci, vanA, vanB, Pseudomonas spp...
January 6, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28058593/ceftaroline-fosamil-for-community-acquired-pneumonia-and-skin-and-skin-structure-infections-a-systematic-review
#18
Maguy Saffouh El Hajj, Ricky D Turgeon, Kyle John Wilby
Background Ceftaroline is a parentally administered cephalosporin that has an in vitro expanded spectrum of activity compared with other cephalosporins yet data is conflicting regarding its place in therapy. Aim of the Review To compare the efficacy and safety of ceftaroline against standard antibiotic regimens for community-acquired pneumonia (CAP) and complicated skin and skin structure infections (cSSSIs). Method The databases of MEDLINE, EBSCO, and Embase were searched up to June 2016. Manual review of references was completed and experts in the field were contacted for unpublished data...
January 5, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/28057656/epidemiology-and-control-measures-of-outbreaks-due-to-antibiotic-resistant-organisms-in-europe-embargo-a-systematic-review-protocol
#19
Nithya Babu Rajendran, Beryl Primrose Gladstone, Jesús Rodríguez-Baño, Frangiscos Sifakis, Andreas Voss, Yehuda Carmeli, Francesco Robert Burkert, Panagiota Gkolia, Evelina Tacconelli
INTRODUCTION: Improving our understanding of outbreaks due to antibiotic-resistant bacteria (ARB) and their control is critical in the current public health scenario. The threat of outbreaks due to ARB requires multifaceted efforts. However, a global overview of epidemiological characteristics of outbreaks due to ARB and effective infection control measures is missing. In this paper, we describe the protocol of a systematic review aimed at mapping and characterising the epidemiological aspects of outbreaks due to ARB and infection control measures in European countries...
5, 2017: BMJ Open
https://www.readbyqxmd.com/read/28056944/iridoids-from-canthium-subcordatum-iso-butanol-fraction-with-potent-biological-activities
#20
Christelle Joubouhi, Jean-de-Dieu Tamokou, David Ngnokam, Laurence Voutquenne-Nazabadioko, Jules-Roger Kuiate
BACKGROUND: The continuous emergence of multi-drug-resistant bacteria drastically reduces the efficacy of antibiotic armory and, consequently, increases the frequency of therapeutic failure. The discovery of new antibacterial drugs is an urgent need. The present study reports the antibacterial and antioxidant activities of the methanol extract, fractions and iridoids from Canthium subcordatum, a plant traditionally used as antidiabetic, anti-inflammatory, and antimicrobial. METHODS: Broth microdilution assay was used to determine minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of extracts and iridoids against Staphylococcus aureus, Vibrio cholerae and Shigella flexneri...
January 5, 2017: BMC Complementary and Alternative Medicine
keyword
keyword
87636
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"