keyword
MENU ▼
Read by QxMD icon Read
search

#MRSA

keyword
https://www.readbyqxmd.com/read/28229435/design-and-pharmacodynamics-of-recombinant-nz2114-histidine-mutants-with-improved-activity-against-methicillin-resistant-staphylococcus-aureus
#1
Huixian Chen, Ruoyu Mao, Da Teng, Xiumin Wang, Ya Hao, Xingjun Feng, Jianhua Wang
NZ2114 is a promising candidate for therapeutic application owing to its potent activity to Staphylococcus aureus. Our objective was to identify NZ2114 derivatives with improved activity through substitution of His16 and His18 with residues Arginine and Lysine. Eight mutants were designed and expressed in Pichia pastoris X-33 via pPICZαA. Five of them exhibited strong antimicrobial activity against S. aureus at low minimal inhibitory concentrations (MICs) of 0.057-0.454 μM. Among them, H1, H2, and H3 showed ideal pharmacodynamic effects on methicillin-resistant S...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28229205/-spectrum-of-pathogens-in-postoperative-complications-of-visceral-surgery-the-problem-of-multidrug-resistance
#2
A Kramer, J Pochhammer, P Walger, U Seifert, M Ruhnke, J C Harnoss
In general surgery the etiology of surgical site infections has not significantly changed over the last 30 years. Gram-positive bacteria, e.g. coagulase negative staphylococci (CNS), Staphylococcus aureus and Enterococcus spp. as well as Gram-negative bacteria, e.g. Escherichia coli, Enterobacter spp., Klebsiella spp. and Pseudomonas aeruginosa, are the most common findings. Although in general surgery 10% of the S. aureus causing postoperative wound infections were methicillin resistant (MRSA), no cases of multidrug-resistant Gram-negative (MRGN) bacteria were reported...
February 22, 2017: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
https://www.readbyqxmd.com/read/28225917/oxacillin-magnetically-targeted-for-the-treatment-of-methicillin-resistant-s-aureus-infection-in-rats
#3
Juliana Fernandes de Carvalho, Ítalo Medeiros de Azevedo, Keyla Borges Ferreira Rocha, Aldo Cunha Medeiros, Artur da Silva Carriço
Purpose: To evaluate the effect of oxacillin bonded to magnetic nanoparticles in local infection model in rat. Methods: Twelve Wistar rats weighing 290±18g were randomly divided into four groups (n=6, each) and all rats had a magnet ring sutured on their right thighs. In the biodistribution group rats 0.1mL of 99mTc-magnetite (0.66 MBq) was injected i.v and after 30 minutes, biodistribution of 99mTc-magnetite was evaluated in right and left thighs. The other groups were inoculated with MRSA in each thigh muscles...
January 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28225654/germicidal-efficacy-and-mammalian-skin-safety-of-222-nm-uv-light
#4
Manuela Buonanno, Brian Ponnaiya, David Welch, Milda Stanislauskas, Gerhard Randers-Pehrson, Lubomir Smilenov, Franklin D Lowy, David M Owens, David J Brenner
We have previously shown that 207-nm ultraviolet (UV) light has similar antimicrobial properties as typical germicidal UV light (254 nm), but without inducing mammalian skin damage. The biophysical rationale is based on the limited penetration distance of 207-nm light in biological samples (e.g. stratum corneum) compared with that of 254-nm light. Here we extended our previous studies to 222-nm light and tested the hypothesis that there exists a narrow wavelength window in the far-UVC region, from around 200-222 nm, which is significantly harmful to bacteria, but without damaging cells in tissues...
February 22, 2017: Radiation Research
https://www.readbyqxmd.com/read/28225264/fatty-acid-comprising-lysine-conjugates-anti-mrsa-agents-that-display-in-vivo-efficacy-by-disrupting-biofilms-with-no-resistance-development
#5
Mohini Mohan Konai, Jayanta Haldar
Methicillin-resistant Staphylococcus aureus (MRSA) have developed resistance to antibiotics of last resort such as vancomycin, linezolid and daptomycin. Additionally, their biofilm forming capability has set an alarming situation in the treatment of bacterial infections. Herein we report the potency of fatty acid comprising lysine conjugates as novel anti-MRSA agents, which were not only capable of killing growing planktonic MRSA at low concentration (MIC = 3.1-6.3 µg/mL), but also displayed potent activity against non-dividing stationary phase cells...
February 22, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28224873/-mrsa-infection-via-a-staff-member-with-eczema
#6
B P Overbeek, W E A Maathuis-de Haan, G Stoffer
BACKGROUND: Transmission of MRSA from livestock to humans is rare, but it is advisable to remain alert. CASE STUDY: Following 2 hospital admissions within a month and a half, a 73-year-old patient was found to have become infected with MRSA. The MRSA type was livestock-related. Investigations into contact between the patient and staff revealed that 3 staff members were infected with the same bacteria; one of them had eczema on both hands. Her daughter, who worked intensively with horses, was revealed to be a carrier of the same type of MRSA...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28223977/staphylococcal-aureus-enterotoxin-c-and-enterotoxin-like-l-associated-with-post-partum-mastitis
#7
Kristina T Franck, Heidi Gumpert, Bente Olesen, Anders R Larsen, Andreas Petersen, Jette Bangsborg, Per Albertsen, Henrik Westh, Mette D Bartels
Denmark is a low prevalence country with regard to methicillin resistant Staphylococcus aureus (MRSA). In 2008 and 2014, two neonatal wards in the Copenhagen area experienced outbreaks with a typical community acquired MRSA belonging to the same spa type and sequence type (t015:ST45) and both were PVL and ACME negative. In outbreak 1, the isolates harbored SCCmec IVa and in outbreak 2 SCCmec V. The clinical presentation differed between the two outbreaks, as none of five MRSA positive mothers in outbreak 1 had mastitis vs...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28223552/ca-mg-zn-co3-and-ca-mg-co3-tri-and-bi-elemental-carbonate-microparticles-for-novel-injectable-self-gelling-hydrogel-microparticle-composites-for-tissue-regeneration
#8
Timothy E L Douglas, Katarzyna Sobczyk, Agata Lapa, Katarzyna Wlodarczyk, Gilles Brackman, Irina Vidiasheva, Katarzyna Reczyńska, Krzysztof Pietryga, David Schaubroeck, Vitaliy Bliznuk, Pascal Van der Voort, Heidi Declercq, Jan Van den Bulcke, Sangram Samal, Dmitry Khalenkow, Bogdan Parakhonskiy, Joris Van Acker, Tom Coenye, Malgorzata Lewandowska-Szumiel, Elzbieta Pamula, Andre Skirtach
Injectable composites for tissue regeneration can be developed by dispersion of inorganic microparticles and cells in a hydrogel phase. In this study, multifunctional carbonate microparticles containing different amounts of calcium, magnesium and zinc were mixed with solutions of gellan gum (GG), an anionic polysaccharide, to form injectable hydrogel-microparticle composites, containing Zn, Ca and Mg. Zn and Ca were incorporated into microparticle preparations to a greater extent than Mg. Microparticle groups were heterogeneous and contained microparticles of differing shape and elemental composition...
February 22, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28223376/bactericidal-and-fungicidal-activity-of-n-chlorotaurine-is-enhanced-in-cystic-fibrosis-sputum-medium
#9
Martina Gruber, Ivan Moser, Markus Nagl, Michaela Lackner
Lung infections with multiresistant pathogens are a major problem of patients suffering from cystic fibrosis (CF). N-chlorotaurine (NCT), a microbicidal active chlorine compound with no resistance development, is well tolerated upon inhalation. The aim of this study was to investigate NCT on its bactericidal and fungicidal activity in vitro in artificial sputum medium (ASM) mimicking the composition of cystic fibrosis mucus.The medium was inoculated with bacteria (Staphylococcus aureus including some MRSA strains, Pseudomonas aeruginosa, Escherichia coli) or spores of fungi (Aspergillus fumigatus, Aspergillus terreus, Candida albicans, Scedosporium apiospermum, Scedosporium boydii, Lomentospora prolificans, Scedosporium aurantiacum, Scedosporium minutisporum, Exophiala dermatitidis, Geotrichum sp...
February 21, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28222919/specific-infectious-organisms-associated-with-poor-outcomes-in-treatment-for-hip-periprosthetic-infection
#10
Daniel J Cunningham, Joseph J Kavolus, Michael P Bolognesi, Samuel S Wellman, Thorsten M Seyler
BACKGROUND: Periprosthetic hip infection treatment remains a significant challenge for orthopedics. Some studies have suggested that methicillin resistance and gram-negative organism type are associated with increased treatment failure. The aim of this research is to determine if specific organisms were associated with poor outcomes in treatment for hip periprosthetic infection. METHODS: Records were reviewed of all patients between 2005 and 2015 who underwent treatment for infected partial or total hip arthroplasty...
January 26, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28221920/prevalence-and-molecular-characterization-of-methicillin-resistant-staphylococcus-aureus-in-foods-of-animal-origin-turkey
#11
Belgin Siiriken, Tuba Yildirim, Akif Koray Güney, Irfan Erol, Belma Durupinar
In the present study, 175 coagulase-positive Staphylococcus (CPS) isolates recovered from samples of beef (n = 110), raw milk n = 56), and fish (n = 9) were analyzed for methicillin resistance using MIC and PCR assays. Methicillin-resistant (MR) Staphylococcus aureus (SA) isolates were then characterized using pulsed-field gel electrophoresis (PFGE). According to findings, 62 (35.4%) of the isolates (44 from beef, 9 from milk, and 9 from fish) were identified as S. aureus based on the presence of the nuc gene...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221858/genotypic-and-phenotypic-characterization-of-methicillin-resistant-staphylococcus-aureus-isolated-from-bovine-mastitic-milk-in-korea
#12
Jae Won Song, Soo Jin Yang, Sook Shin, Keun Seok Seo, Yong Ho Park, Kun Taek Park
Staphylococcus aureus is a major etiological pathogen for bovine mastitis, foodborne illness, and various clinical infections. Methicillin-resistant S. aureus (MRSA) has been isolated from bovine mastitic milk, and the presence of MRSA in milk is a major public health concern. We investigated the frequency of MRSA isolation from mastitic raw milk in Korea and characterized the patterns of antimicrobial resistance, virulence, and genotypes of the MRSA isolates. A total of 1,222 raw milk samples were collected from 47 dairy farms in Gyeonggi province from 2011 to 2012...
October 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28219463/factors-associated-with-persistent-colonisation-with-methicillin-resistant-staphylococcus-aureus
#13
V C Cluzet, J S Gerber, I Nachamkin, S E Coffin, M F Davis, K G Julian, T E Zaoutis, J P Metlay, D R Linkin, P Tolomeo, J A Wise, W B Bilker, B Hu, E Lautenbach
We conducted a prospective cohort study between 1 January 2010 and 31 December 2012 at five adult and paediatric academic medical centres to identify factors associated with persistent methicillin-resistant Staphylococcus aureus (MRSA) colonisation. Adults and children presenting to ambulatory settings with a MRSA skin and soft tissue infection (i.e. index cases), along with household members, performed self-sampling for MRSA colonisation every 2 weeks for 6 months. Clearance of colonisation was defined as two consecutive negative sampling periods...
February 21, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28219242/spiroaspertrione-a-a-bridged-spirocyclic-meroterpenoid-as-a-potent-potentiator-of-oxacillin-against-methicillin-resistant-staphylococcus-aureus-from-aspergillus-sp-tj23
#14
Yan He, Zhengxi Hu, Weiguang Sun, Qin Li, Xiao-Nian Li, Hucheng Zhu, Jinfeng Huang, Junjun Liu, Jianping Wang, Yongbo Xue, Yonghui Zhang
Bioassay-guided isolation of cultures of Aspergillus sp. TJ23 yielded a novel terpene-polyketide hybrid spiromeroterpenoid, spiroaspertrione A (1), bearing a unique spiro[bicyclo[3.2.2]nonane-2,1'-cyclohexane] carbocyclic skeleton and a new bio-intermediate andiconin B (2). Their structures and absolute configurations were elucidated by spectroscopic analyses, single-crystal X-ray diffraction, and electronic circular dichroism (ECD) calculations. Compound 1 demonstrated potent resensitization of oxacillin against MRSA by lowering the oxacillin minimal inhibitory concentration (MIC) up to 32-fold from 32 μg/mL to 1 μg/mL...
February 21, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28216880/isolation-and-characterisation-of-a-proanthocyanidin-with-antioxidative-antibacterial-and-anti-cancer-properties-from-fern-blechnum-orientale
#15
How-Yee Lai, Yau-Yan Lim, Kah-Hwi Kim
BACKGROUND: Blechnum orientale Linn. (Blechnaceae), a fern, is traditionally used in the treatment of various ailments, such as skin diseases, stomach pain, urinary bladder complaints, and also as a female contraceptive. Previously, we reported a strong radical scavenging activity, antibacterial activity and cytotoxicity against HT29 colon cancer cells by aqueous extract of B. orientale. OBJECTIVE: In this study, we attempted to isolate and identify the active compound from the aqueous extract of B...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28216019/draft-genome-sequence-of-reduced-teicoplanin-susceptible-and-vancomycin-heteroresistant-methicillin-resistant-staphylococcus-aureus-from-sepsis-cases
#16
Yamuna Devi Bakthavatchalam, Balaji Veeraraghavan, Naveen Kumar Devanga Ragupathi, Priyanka Babu, Elakkiya Munuswamy, Thambu David
Here we report the whole-genome shotgun sequence of six methicillin-resistant Staphylococcus aureus (MRSA) showing reduced susceptibility to both vancomycin and teicoplanin. The typical Indian community-acquired MRSA (CA-MRSA) clone ST772-MRSA-V-t657 was the most common genotype (3/6; 50%), followed by ST672-MRSA-IV (2/6; 33%) and ST22-MRSA-IV (1/6; 17%). All strains harboured a mutation in the tcaRAB operon, vraSR, graSR and/or rpoB genes, which are frequently mutated determinants in a heteroresistant vancomycin-intermediate S...
February 15, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28216018/prospective-randomised-controlled-study-evaluating-early-modification-of-oral-microbiota-following-admission-to-the-intensive-care-unit-and-oral-hygiene-with-chlorhexidine
#17
Felipe Francisco Tuon, Oleg Gavrilko, Saulo de Almeida, Eigi Ricardo Sumi, Thiago Alberto, Jaime Luis Rocha, Edvaldo Antonio Rosa
OBJECTIVES: Chlorhexidine (CHX) is the most commonly used oral hygiene product for the prevention of ventilator-associated pneumonia (VAP) in patients undergoing mechanical ventilation (MV). The change in dental plaque (DP) microbiota following CHX use in patients under MV has not been described previously. The aim of this study was to evaluate the incidence of pathogenic bacteria associated with VAP and the coverage of DP within the oral cavity in patients administered CHX. METHODS: This was a prospective, randomised, controlled, double-blind study in patients (n=16) under MV who were mouth-rinsed with either CHX or placebo...
February 18, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28215090/nonviral-genome-editing-based-on-a-polymer-derivatized-crispr-nanocomplex-for-targeting-bacterial-pathogens-and-antibiotic-resistance
#18
Yoo Kyung Kang, Kyu Kwon, Jea Sung Ryu, Ha Neul Lee, Chankyu Park, Hyun Jung Chung
The overuse of antibiotics plays a major role in the emergence and spread of multidrug-resistant bacteria. A molecularly targeted, specific treatment method for bacterial pathogens can prevent this problem by reducing the selective pressure during microbial growth. Herein, we introduce a nonviral treatment strategy delivering genome editing material for targeting antibacterial resistance. We apply the CRISPR-Cas9 system, which has been recognized as an innovative tool for highly specific and efficient genome engineering in different organisms, as the delivery cargo...
February 19, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28214232/new-nitrofurans-amenable-by-isocyanide-multicomponent-chemistry-are-active-against-multidrug-resistant-and-poly-resistant-mycobacterium-tuberculosis
#19
Mikhail Krasavin, Vladislav Parchinsky, Grigory Kantin, Olga Manicheva, Marine Dogonadze, Tatiana Vinogradova, Bianka Karge, Mark Brönstrup
A set of structurally diverse N-amino δ-lactams decorated with a 5-nitro-2-furyl moiety was synthesized using isocyanide-based multicomponent chemistry and evaluated for antibacterial activity. Three compounds displayed a selective and potent (MIC 22-33μM) inhibition of M. tuberculosis H37Rv strain growth, while other Gram-positive (MRSA and E. faecium) or Gram-negative (E. coli, P. aeruginosa, A. baumannii, K. pneumoniae) pathogens were not affected. The compounds also displayed moderate-low cytotoxicity, as demonstrated in cell line viability assays...
February 4, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28213334/reactive-oxygen-a-novel-antimicrobial-mechanism-for-targeting-biofilm-associated-infection
#20
REVIEW
Matthew S Dryden, Jonathan Cooke, Rami J Salib, Rebecca E Holding, Timothy Biggs, Ali A Salamat, Raymond N Allan, Rachel S Newby, Fenella Halstead, Beryl Oppenheim, Thomas Hall, Sophie C Cox, Liam M Grover, Zain Al-Hindi, Lilyann Novak-Frazer, Malcolm D Richardson
Reactive oxygen species (ROS) is a novel therapeutic strategy for topical or local application to wounds, mucosa or internal structures where there may be heavy bacterial bioburden with biofilm and chronic inflammation. Bacterial biofilms are a significant problem in clinical settings owing to their increased tolerance towards conventionally prescribed antibiotics and their propensity for selection of further antibacterial resistance. There is therefore a pressing need for the development of alternative therapeutic strategies that can improve antibiotic efficacy towards biofilms...
February 14, 2017: Journal of Global Antimicrobial Resistance
keyword
keyword
22006
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"