keyword
MENU ▼
Read by QxMD icon Read
search

Staphylococcus aureus

keyword
https://www.readbyqxmd.com/read/28732197/wrecking-staph-s-rafts-staphylococcus-aureus-no-longer-unsinkable
#1
Rafi Rashid, Kimberly A Kline
Functional membrane microdomains (FMMs) serve to spatially restrict and coordinate a diversity of cellular functions. Flotillins serve as scaffolds within FMMs, and in this issue of Cell Chemical Biology, Koch et al. (2017) show that disrupting Staphylococcus aureus scaffolds via small molecules perturbs virulence gene expression and attenuates S. aureus virulence.
July 20, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28731688/the-%C3%AF-configuration-of-the-www-motif-of-a-short-trp-rich-peptide-is-critical-for-targeting-bacterial-membranes-disrupting-preformed-biofilms-and-killing-methicillin-resistant-staphylococcus-aureus
#2
D Zarena, Biswajit Mishra, Tamara Lushnikova, Fangyu Wang, Guangshun Wang
Tryptophan-rich peptides, being short and suitable for large-scale chemical synthesis, are attractive candidates for developing a new generation of antimicrobials to combat antibiotic-resistant bacteria (superbugs). Although there are numerous pictures for membrane-bound structure of a single tryptophan (W), how multiple Trp amino acids assemble themselves and interact with bacterial membranes are poorly understood. This communication presents the three-dimensional structure for an eight-residue Trp-rich peptide (WWWLRKIW-NH2 with 50% W) determined by the improved 2D NMR method, which includes the measurements of 13C and 15N chemical shifts at natural abundance...
July 21, 2017: Biochemistry
https://www.readbyqxmd.com/read/28731670/calcaneus-osteomyelitis-secondary-to-guthrie-test-case-report
#3
Tugce Tural Kara, Tugba Erat, Halil Ozdemir, Aysun Yahsi, Suat Fitoz, Ergin Ciftci, Erdal Incea
Calcaneus osteomyelitis is a rare infection in newborns. Invasive procedures, prematurity and low birth wight are some causative factors. The clinical signs may be mild. We report a neonate with calcaneous osteomyelitis which was secondary to a Guthrie test sample. She was admitted to hospital with swelling, redness and increased temperature on her heel. Superficial tissue ultrasound showed fluid collection with heavy content was observed on the posterior of the right foot. Puncture and drainage was performed and methicillin-susceptible Staphylococcus aureus was isolated from the drainage culture...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28731664/-severe-infection-by-methicillin-sensitive-staphylococcus-aureus-producing-panton-valentine-leukocidin-reports-of-two-cases
#4
Martín Brizuela, Guadalupe Pérez, Silvina Ruvinsky, Claudia Sarkis, Romina Romero, Alejandra Mastroianni, Lidia Casimir, María E Venuta, Verónica Gómez Bonduele, Rosa Bologna
Staphylococcus aureus is a major etiologic agent of infections in children from the community and the hospital setting. The severity of these conditions is associated with virulence factors, including the Panton-Valentine leukocidin. Both methicillin resistant and sensitive Staphylococcus aureus produce this leukocidin although with varying frequency. We present two children with severe infection by sensitive Staphylococcus aureus producer of Panton-Valentine leukocidin with musculoskeletal and endovascular complications...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28731325/bioinspired-and-biomimetic-agnps-gentamicin-embedded-silk-fibroin-coatings-for-robust-antibacterial-and-osteogenetic-applications
#5
Wenhao Zhou, Zhaojun Jia, Pan Xiong, Jianglong Yan, Yangyang Li, Ming Li, Yan Cheng, Yufeng Zheng
With the progressively increasing demand for orthopedic Ti implants, the balance realization between two primary complications restricting implants applications is imperative needed to be solved that the lack of bone tissue integration and biomedical device-associated infections (BAI), where emergence of multi-resistance bacteria make it worse. Notably, a combination of silver nanoparticles (AgNPs) and a kind of antibiotic can synergistically inhibit bacterial growth, where low concentration of AgNPs has been confirmed to promote the proliferation and osteogenesis of osteoblasts...
July 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28730979/adsorption-of-staphylococcus-viruses-s13-and-s24-1-on-staphylococcus-aureus-strains-with-different-glycosidic-linkage-patterns-of-wall-teichoic-acids
#6
Jumpei Uchiyama, Maya Taniguchi, Kenji Kurokawa, Iyo Takemura-Uchiyama, Takako Ujihara, Hidekatsu Shimakura, Yoshihiko Sakaguchi, Hironobu Murakami, Masahiro Sakaguchi, Shigenobu Matsuzaki
The group of phages belonging to the family Podoviridae, genus P68virus, including Staphylococcus viruses S13' and S24-1, are important because of their benefits in phage therapy against Staphylococcus aureus infections. The O-glycosidic linkage patterns of wall teichoic acids (WTAs) in S. aureus cell walls seem to be important for adsorption of this phage group. In this study, the adsorption of Staphylococcus viruses S13' and S24-1 to S. aureus was examined using strains with modified WTA glycosidic linkage patterns...
July 21, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28730135/clinical-characteristics-and-ultrasonographic-findings-of-acute-bacterial-enterocolitis-in-children
#7
Peter Chun, Taek Jin Lim, Eun Ha Hwang, Sang Wook Mun, Yeoun Joo Lee, Jae Hong Park
PURPOSE: This study clarified the bacterial pathogens currently causing acute infectious enterocolitis (AIE) in children and evaluated the clinical characteristics and ultrasonographic findings according to the different pathogens. METHODS: Medical records regarding age, sex, clinical symptoms, laboratory data, identified enteropathogens, ultrasonographic findings, treatment, and outcome of 34 patients who were diagnosed with AIE via stool examination using multiplex polymerase chain reaction (PCR) or culture, were retrospectively reviewed...
June 2017: Pediatric Gastroenterology, Hepatology & Nutrition
https://www.readbyqxmd.com/read/28729209/clonal-spread-of-methicillin-resistant-staphylococcus-aureus-t6065-cc5-sccmecv-agrii-in-a-libyan-hospital
#8
Monia Khemiri, Ali Akrout Alhusain, Mohamed Salah Abbassi, Houyem El Ghaieb, Sofia Santos Costa, Adriana Belas, Constança Pomba, Salah Hammami
OBJECTIVES: The aim of this study was to characterize 32 MRSA isolates recovered from wound specimens of patients in a Hospital in Tripoli, Libya, during 2013. METHODS: MRSA isolates were characterized by determining their antibiotic susceptibilities, genes encoding antibiotic resistance and virulence factors, the SCCmec class, agr type, spa typing, PFGE and MLST. RESULTS: PFGE and MLST revealed that all isolates were clonal and belonged to the Clonal Complex 5 (CC5)...
July 17, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28729204/characterization-of-clinical-isolates-oxacillin-susceptible-meca-positive-staphylococcus-aureus-os-mrsa-in-china-from-2009-2014
#9
Yunjia Song, Lanqing Cui, Yuan Lv, Yun Li, Feng Xue
OBJECTIVE: The study aimed to investigate the prevalence and molecular characteristics of clinical oxacillin-susceptible mecA-positive Staphylococcus aureus (OS-MRSA) isolates in China from July 2009 to June 2014. METHODS: A total of 2,068 non-duplicated Staphylococcus aureus isolates were collected from 21 hospitals and the susceptibility test were performed by agar dilution method. All the OS-MRSA strains were screened for the presence of the mecA, mecC and nuc gene as well as Panton-Valentine leucocidin gene(PVL)...
July 17, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28729052/tedizolid-inhibits-muc5ac-production-induced-by-methicillin-resistant-staphylococcus-aureus-in-human-airway-epithelial-cells
#10
Kazuaki Takeda, Norihito Kaku, Yoshitomo Morinaga, Kosuke Kosai, Naoki Uno, Yoshifumi Imamura, Hiroo Hasegawa, Taiga Miyazaki, Koichi Izumikawa, Hiroshi Mukae, Katsunori Yanagihara
The innate immune system plays an important role in early immunity against respiratory tract infection. Although airway epithelial cells produce mucus to eliminate pathogens and irritants, hypersecretion of mucus is harmful for the host as it may cause airway obstruction and inhibit influx of antimicrobial agents. It has been reported that several antimicrobial agents have an immunomodulatory effect in vitro and in vivo, but little is known about whether tedizolid, a novel oxazolidinone, can modulate immune responses...
July 17, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28728970/the-staphylococcus-aureus-fasii-bypass-escape-route-from-fasii-inhibitors
#11
REVIEW
Claire Morvan, David Halpern, Gérald Kénanian, Amit Pathania, Jamila Mondoloni-Anba, Gilles Lamberet, Alexandra Gruss, Karine Gloux
Antimicrobials targeting the fatty acid synthesis (FASII) pathway are being developed as alternative treatments for bacterial infections. Emergence of resistance to FASII inhibitors was mainly considered as a consequence of mutations in the FASII target genes. However, an alternative and efficient anti-FASII resistance strategy, called here FASII bypass, was uncovered. Bacteria that bypass FASII make use of exogenous fatty acids to build their membranes, and thus dispense with the need for FASII. This strategy is used by numerous Gram-positive low GC% bacteria, including streptococci, enterococci, and staphylococci...
July 17, 2017: Biochimie
https://www.readbyqxmd.com/read/28728556/influence-of-staphylococcus-aureus-on-outcomes-after-valvular-surgery-for-infective-endocarditis
#12
Sang Myung Han, Robert A Sorabella, Sowmya Vasan, Mark Grbic, Daniel Lambert, Rahul Prasad, Catherine Wang, Paul Kurlansky, Michael A Borger, Rachel Gordon, Isaac George
BACKGROUND: As Staphylococcus aureus (SA) remains one of the leading cause of infective endocarditis (IE), this study evaluates whether S. aureus is associated with more severe infections or worsened outcomes compared to non-S. aureus (NSA) organisms. METHODS: All patients undergoing valve surgery for bacterial IE between 1995 and 2013 at our institution were included in this study (n = 323). Clinical data were retrospectively collected from the chart review. Patients were stratified according to the causative organism; SA (n = 85) and NSA (n = 238)...
July 20, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28728546/successful-rescue-combination-of-extracorporeal-membrane-oxygenation-high-frequency-oscillatory-ventilation-and-prone-positioning-for-the-management-of-severe-methicillin-resistant-staphylococcus-aureus-pneumonia-complicated-by-pneumothorax-a-case-report-and
#13
Hangyong He, Hao Wang, Xuyan Li, Xiao Tang, Rui Wang, Bing Sun, Zhaohui Tong
BACKGROUND: To describe the experience of combination therapy with extracorporeal membrane oxygenation(ECMO), high-frequency oscillatory ventilation(HFOV) and prone positioning in treating severe respiratory failure caused by community acquired methicillin resistant Staphylococcus aureus(CA-MRSA). CASE PRESENTATION: A 30-year-old female presented with fever and dyspnea for 3 days. She was diagnosed CA-MRSA pneumonia complicated by severe respiratory failure, pneumothorax and neutropenia...
July 20, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28728202/-pyogenic-liver-abscess-changes-of-organisms-and-consequences-for-diagnosis-and-therapy
#14
Alexander Mischnik, Winfried Vincenz Kern, Robert Thimme
Liver abscess is a rare but potentially fatal disease with mortality rates of 2 - 12 %. The spectrum of causative microorganisms varies across the world and is changing due to increasing worldwide travel activity. As a result, previously less frequent pathogens must increasingly be considered in the differential diagnosis. The most common pathogens of liver abscess are so-called abscess streptococci, anaerobes and Gram-negative bacteria such as Escherichia coli and Klebsiella pneumoniae. Certain clones among the Gram-negatives, typically among Klebsiella spp...
July 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28727951/in-vitro-activity-of-telavancin-against-clinically-important-gram-positive-pathogens-from-69-u-s-medical-centers-2015-potency-analysis-by-u-s-census-divisions
#15
Michael A Pfaller, Helio S Sader, Robert K Flamm, Mariana Castanheira, Jennifer I Smart, Rodrigo E Mendes
A total of 8,072 gram-positive isolates collected from 69 medical centers among all 9 U.S. Census Divisions during the 2015 SENTRY Antimicrobial Surveillance Program were included. Telavancin had minimal inhibitory concentration (MIC)50 and MIC90 values of 0.03/0.06 μg/mL, respectively, against methicillin-susceptible (MSSA) and methicillin-resistant Staphylococcus aureus (MRSA). Similar activity was also observed among coagulase-negative staphylococci (MIC50/90, 0.03/0.06 μg/ml; 100.0% inhibited by ≤0...
July 20, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28727907/novel-role-of-surfactant-protein-a-in-bacterial-sinusitis
#16
George T Noutsios, Amanda L Willis, Julie G Ledford, Eugene H Chang
BACKGROUND: Chronic rhinosinusitis (CRS) is a common inflammatory disorder of the upper airway characterized by chronic inflammation and significant sinonasal remodeling. CRS is comprised of 2 major subgroups, based on whether polyps are present or absent. In some cases, it is characterized by colonization with opportunistic pathogens such as Pseudomonas aeruginosa (PA), Staphylococcus aureus, and other bacteria. The innate immune system of the sinonasal epithelium is the first line of defense against inhaled pathogens...
July 20, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28727741/antimicrobial-resistance-rates-in-gram-positive-bacteria-do-not-drive-glycopeptides-use
#17
Beryl Primrose Gladstone, Andrea Cona, Parichehr Shamsrizi, Tuba Vilken, Winfred V Kern, Nisar Malek, Evelina Tacconelli
Surveillance data are considered essential to appropriate empiric antibiotic therapy and stewardship. The objective of this study was to determine if a change in the rates of antibiotic resistance impacts antibiotic use in European hospitals. Glycopeptides use was selected to study the correlation between resistance rates and antibiotic use because of the restricted spectrum against resistant gram positive bacteria. PubMed, ECDC databases and national/regional surveillance systems were searched to identify glycopeptides´ consumption in defined daily dose per 1000 inhabitant-days (DID) and rate of methicillin-resistant Staphylococcus aureus (MRSA), methicillin-resistant coagulase negative staphylococci (MRCoNS), and vancomycin-resistant enterococci (VRE) in bloodstream infections (BSIs) in European countries between 1997 and 2015...
2017: PloS One
https://www.readbyqxmd.com/read/28727445/an-antibiotic-that-inhibits-the-atpase-activity-of-an-abc-transporter-by-binding-to-a-remote-extracellular-site
#18
Leigh Morgan Matano, Heidi Gabrielle Morris, Anthony R Hesser, Sara E S Martin, Wonsik Lee, Tristan W Owens, Emaline Laney, Hidemasa Nakaminami, David Hooper, Timothy C Meredith, Suzanne Walker
Antibiotic-resistant strains of Staphylococcus aureus pose a major threat to human health and there is an ongoing need for new antibiotics to treat resistant infections. In a high throughput screen (HTS) of 230,000 small molecules designed to identify bioactive wall teichoic acid (WTA) inhibitors, we identified one hit, which was expanded through chemical synthesis into a small panel of potent compounds. We showed that these compounds target TarG, the transmembrane component of the two-component ATP-binding cassette (ABC) transporter TarGH, which exports WTA precursors to the cell surface for attachment to peptidoglycan...
July 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28727146/antimicrobial-effects-of-silver-nanoparticles-synthesized-by-fatsia-japonica-leaf-extracts-for-preservation-of-citrus-fruits
#19
Jing Zhang, Guoguo Si, Jun Zou, Ruiliang Fan, Ailing Guo, Xuetuan Wei
Due to their potent antimicrobial activity, silver nanoparticles (AgNPs) synthesized by biomass might be promising in food preservation, whereas effects of AgNPs on Penicillium italicum-induced rot of Citrus fruits have not been investigated. In this study, a novel AgNPs biosynthesis method was developed based on Fatsia japonica leaf extracts. It was revealed that concentrations of leaf extracts, AgNO3 and NaCl affected AgNPs yields and particle sizes obviously. Under the optimized conditions (8 mg/mL extracts, 2 mM AgNO3 and 1 mM NaCl), AgNPs, synthesized within 80 min, showed potent preservative effect against P...
July 20, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28727010/effect-of-experimentally-increased-protein-supply-to-postpartum-dairy-cows-on-plasma-protein-synthesis-rumen-tissue-proliferation-and-immune-homeostasis
#20
M Larsen, C M Røntved, P K Theil, M Khatun, C Lauridsen, N B Kristensen
The effect of experimentally increasing the postpartum protein supply on plasma protein synthesis, rumen tissue proliferation, and immune homeostasis was studied using 8 periparturient Holstein cows in a complete randomized design. At calving, cows were assigned to abomasal infusion of water (CTRL) or casein (CAS) in addition to a lactation diet. Casein infusion was gradually decreased from 696 ± 1 g/d at +2 d relative to calving (DRTC) to 212 ± 10 g/d at +29 DRTC to avoid excessive supply. Synthesis rate of plasma proteins was measured at -14, +4, +15, and +29 DRTC by measuring [C]Phe isotopic enrichment in arterial plasma free Phe, total plasma proteins, and albumin after 3, 5, and 7 h of jugular ring[C]Phe infusion...
May 2017: Journal of Animal Science
keyword
keyword
156
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"