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https://www.readbyqxmd.com/read/29156865/antibacterial-resistance-patterns-and-incidence-of-hospital-acquired-staphylococcus-aureus-bacteremia-in-a-tertiary-care-educational-hospital-in-turkey-a-perspective-from-2001-to-2013
#1
Oğuz Reşat Sipahi, Serhat Uysal, Sabire Şöhret Aydemir, Hüsnü Pullukçu, Meltem Taşbakan, Alper Tünger, Fatma Feriha Çilli, Tansu Yamazhan, Bilgin Arda, Hilal Sipahi, Sercan Ulusoy
Background/aim: Staphylococcus aureus is an important nosocomial pathogen and a successful antimicrobial-resistance developer. In this study we retrospectively evaluated the resistance patterns and incidence of microbiologically confirmed nosocomial bacteremia (MCNB) related S. aureus strains between 2001 and 2013. Materials and methods: Any patient in whom S. aureus was isolated in at least one set of blood cultures (sent to the bacteriology laboratory 72 h after hospital admission) was considered to have MCNB...
August 23, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29156244/isolation-and-characterization-of-polyvalent-bacteriophages-infecting-multi-drug-resistant-salmonella-serovars-isolated-from-broilers-in-egypt
#2
Mayada Mahmoud, Ahmed Askora, Ahmed Barakat Barakat, Omar El-Farouk Rabie, Sayed Emam Hassan
In this study, we isolated and characterized three phages named as Salmacey1, Salmacey2 and Salmacey3, infecting multi drug resistant Salmonella serovars isolated from broilers in Egypt. The most prevalent Salmonella serovars were S. typhimurium, S. enteritidis, and S. kentucky. All these Salmonella serovars were found to be resistant to more than two of the ten antimicrobial agents tested. Only S. kentucky was found to be resistant to seven antimicrobial agents. Examination of these phage particles by transmission electron microscopy (TEM), demonstrated that two phages (Salmacey1, Salmacey2) were found to belong to family Siphoviridae, and Salmacey3 was assigned to the family Myoviridae...
November 14, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29155867/spectrum-of-pathogen-and-model-specific-histopathologies-in-mouse-models-of-acute-pneumonia
#3
Kristina Dietert, Birgitt Gutbier, Sandra M Wienhold, Katrin Reppe, Xiaohui Jiang, Ling Yao, Catherine Chaput, Jan Naujoks, Markus Brack, Alexandra Kupke, Christin Peteranderl, Stephan Becker, Carolin von Lachner, Nelli Baal, Hortense Slevogt, Andreas C Hocke, Martin Witzenrath, Bastian Opitz, Susanne Herold, Holger Hackstein, Leif E Sander, Norbert Suttorp, Achim D Gruber
Pneumonia may be caused by a wide range of pathogens and is considered the most common infectious cause of death in humans. Murine acute lung infection models mirror human pathologies in many aspects and contribute to our understanding of the disease and the development of novel treatment strategies. Despite progress in other fields of tissue imaging, histopathology remains the most conclusive and practical read out tool for the descriptive and semiquantitative evaluation of mouse pneumonia and therapeutic interventions...
2017: PloS One
https://www.readbyqxmd.com/read/29155327/expression-profiles-of-the-p38-mapk-signaling-pathway-from-chinese-shrimp-fenneropenaeus-chinensis-in-response-to-viral-and-bacterial-infections
#4
Yuying He, Wanlong Yao, Ping Liu, Jian Li, Qingyin Wang
Mitogen-activated protein kinase (MAPK) signaling pathway plays an important role in cellular response to inflammatory cytokines, environmental stress and pathogenic infection, However, compared with mammals and insects, the potential function of p38 MAPK from Chinese shrimp (Fenneropenaeus chinensis) in response to viruses and bacterial infection is limited. In the study, the immune responses of four genes MKK3, MKK4, p38 and ATF-2 from F. chinensis were investigated in defending against white spot syndrome virus (WSSV), Vibrio anguillarum (V...
November 16, 2017: Gene
https://www.readbyqxmd.com/read/29155275/antibacterial-compounds-from-the-australian-native-plant-eremophila-glabra
#5
Azizah A Algreiby, Katherine A Hammer, Zoey Durmic, Phil Vercoe, Gavin R Flematti
Recent reports of Eremophila glabra (R.Br.) Ostenf. (Scrophulariaceae) displaying antibacterial activity has led us to investigate the bioactive secondary metabolites responsible for this activity. Bioassay-directed fractionation of solvent extracts prepared from the leaves of E. glabra led to the isolation of seven serrulatane diterpenes, three flavonoids and the caffeoyl ester disaccharide verbascoside. Among these, four serrulatanes, namely 18-acetoxy-8, 20-dihydroxyserrulat-14-en-19-oic acid (14), 18,20-diacetoxy-8-hydroxyserrulat-14-en-19-oic acid (16), 8,18,20-triacetoxyserrulat-14-en-19-oic acid (17) and 18-acetoxy-8-hydroxyserrulat-14-en-19-oic acid (18) are described for the first time, while 8,20-diacetoxyserrulat-14-en-19-oic acid (3), 8,18,20-trihydroxyserrulat-14-en-19-oic acid (5) and 20-acetoxy-8-hydroxyserrulat-14-en-19-oic acid (19) were previously reported...
November 15, 2017: Fitoterapia
https://www.readbyqxmd.com/read/29153733/antibacterial-activity-of-endodontic-sealers-against-planktonic-bacteria-and-bacteria-in-biofilms
#6
Vasileios Kapralos, Andreas Koutroulis, Dag Ørstavik, Pia Titterud Sunde, Håkon Valen Rukke
INTRODUCTION: The aim of this study was to investigate the antibacterial activity of 4 endodontic sealers against bacteria planktonic grown or in biofilms commonly detected from persistent and secondary endodontic infections. METHODS: The antibacterial activity of the sealers AH Plus, TotalFill BC sealer, RoekoSeal, and Guttaflow 2 was investigated for planktonic grown and 24-hour-old biofilms of Enterococcus faecalis, Staphylococcus epidermidis, Staphylococcus aureus, and Streptococcus mutans...
November 15, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29153470/impact-of-a-pharmacist-driven-care-package-on-staphylococcus-aureus-bacteremia-management-in-a-large-community-healthcare-network-a-propensity-score-matched-quasi-experimental-study
#7
Jordan R Smith, Jeremy J Frens, Cynthia B Snider, Kimberly C Claeys
OBJECTIVES: Staphylococcus aureus bacteremia (SAB) is an important cause of morbidity and mortality. Suboptimal treatment has been associated with poor patient outcomes. Our antimicrobial stewardship program (ASP) evaluated SAB management based on predefined performance measures both prior to and after instituting a "care package" intervention led by clinical pharmacists and infectious diseases physicians. The primary outcome included a 4-point "optimal care score" (OCS) consisting of targeted antibiotic therapy within 24hours, repeating blood cultures, antibiotic duration assessment, and appropriate duration of therapy...
October 7, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29152974/biocompatible-copper-oxide-nanoparticle-composites-from-cellulose-and-chitosan-facile-synthesis-unique-structure-and-antimicrobial-activity
#8
Chieu D Tran, James Makuvaza, Erik Munson, Brian Bennett
Copper in various forms has been known to have bactericidal activity. Challenges to its application include preventing mobilization of the copper, to both extend activity and avoid toxicity, and bioincompatibility of many candidate substrates for copper-immobilization. Using a simple ionic liquid, butylmethylimmidazolium chloride as the solvent, we developed a facile and green method to synthesize biocompatible composites containing copper oxide nanoparticles (CuONPs) from cellulose (CEL) and chitosan (CS) or CEL and keratin (KER)...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29152635/profiling-polyphenol-composition-by-hplc-dad-esi-msn-and-the-antibacterial-activity-of-infusion-preparations-obtained-from-four-medicinal-plants
#9
Borhane E C Ziani, Lillian Barros, Ali Z Boumehira, Khaldoun Bachari, Sandrina A Heleno, Maria Jose Alves, Isabel C F R Ferreira
The infusions of Thymus pallescens Noë, Saccocalyx satureioides Coss. et Dur., Ptychotis verticillata Briq. and Limoniastrum guyonianum Boiss. have been used as medicinal remedies for many diseases in Algerian folk medicine. These species have also been well documented as rich sources of phytochemicals, such as phenolic compounds with wide diversified chemical structures, which exhibit far-ranging biological activities. Thus, the phenolic compound profile of the aqueous extracts, obtained by infusing, of the mentioned species was obtained by HPLC-DAD-ESI/MS, and their antibacterial activity was evaluated against clinical isolates...
November 20, 2017: Food & Function
https://www.readbyqxmd.com/read/29152580/chromosomal-targeting-by-the-type-iii-a-crispr-cas-system-can-reshape-genomes-in-staphylococcus-aureus
#10
Jing Guan, Wanying Wang, Baolin Sun
CRISPR-Cas (clustered regularly interspaced short palindromic repeat [CRISPR]-CRISPR-associated protein [Cas]) systems can provide protection against invading genetic elements by using CRISPR RNAs (crRNAs) as a guide to locate and degrade the target DNA. CRISPR-Cas systems have been classified into two classes and five types according to the content of cas genes. Previous studies have indicated that CRISPR-Cas systems can avoid viral infection and block plasmid transfer. Here we show that chromosomal targeting by the Staphylococcus aureus type III-A CRISPR-Cas system can drive large-scale genome deletion and alteration within integrated staphylococcal cassette chromosome mec (SCCmec)...
November 2017: MSphere
https://www.readbyqxmd.com/read/29151652/antimicrobial-efficacy-of-synthetic-pyranochromenones-and-coumarinyloxy-acetamides
#11
Abhishek K Singh, Suchita Prasad, Bipul Kumar, Shiv Kumar, Amitesh Anand, Shashank S Kamble, Sunil K Sharma, Hemant K Gautam
Four (1, 2, 4 and 6) synthetic quaternary ammonium derivatives of pyranochromenones and (coumarinyloxy)acetamides were synthesized and investigated for their antimicrobial efficacy on MRSA (Methicillin-resistant Staphylococcus aureus), and multi-drug resistant Pseudomonas aeruginosa, Salmonella enteritidis and Mycobacterium tuberculosis H37Rv strain. One of the four compounds screened i.e. N,N,N-triethyl-10-((4,8,8-trimethyl-2-oxo-2,6,7,8-tetrahydropyrano[3,2-g]chromen-10-yl)oxy)decan-1-aminium bromide (1), demonstrated significant activity against S...
December 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/29151647/7-10-epoxyoctadeca-7-9-dienoic-acid-a-small-molecule-adjuvant-that-potentiates-%C3%AE-lactam-antibiotics-against-multidrug-resistant-staphylococcus-aureus
#12
Chakradhar Dasagrandhi, Young-Soon Kim, In-Hwan Kim, Ching T Hou, Hak-Ryul Kim
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) infections with multi-drug resistance needs effective and alternative control strategies. In this study we investigated the adjuvant effect of a novel furan fatty acid, 7,10-epoxyoctadeca-7,9-dienoic acid (7,10-EODA) against multidrug-resistant S. aureus (MDRSA) strain 01ST001 by disc diffusion, checker board and time kill assays. Further the membrane targeting action of 7,10-EODA was investigated by spectroscopic and confocal microscopic studies...
December 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/29150768/toe-web-intertrigo-in-kaposi-s-sarcoma-patients-a-microbiological-study-in-a-large-cohort-of-patients
#13
G Nazzaro, A Tourlaki, B Scoppio, A Restelli, A Grancini, L Brambilla
Kaposi 's sarcoma (KS) is a rare multifocal angioproliferative disease associated with human herpes virus 8 (HHV-8) infection, characterized by cutaneous nodules or plaques especially on the lower limbs. Some skin modifications, such as chronic lymphedema, plantar hyperkeratosis and interdigital desquamation, may be associated with consequent impairment of the local immunosurveillance and increased risk of some bacterial or mycotic infections. With the objective of evaluating if bacterial or mycotic infections in KS patients are supported by different microorganisms compared to control patients, we performed an observational retrospective study, comparing positive cultural swabs of interdigital intertrigo of KS patients with positive cultural swabs of interdigital intertrigo of patients admitted to our dermatologic unit during the last 10 years...
November 17, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29149811/testing-actions-of-a-multi-action-emollient-patient-acceptability-efficacy-skin-biophysiology-and-staphylococcal-isolation
#14
Kam Lun E Lun Hon
AIM: Eczema or atopic dermatitis (AD) is associated with itch, sleep disturbance, impaired life quality, reduced skin hydration, impaired epidermal barrier function and colonization by Staphylococcus aureus (SA). We investigated an emollient with claimed multi-actions on barrier repair, antihistaminergic and antimicrobial effects. METHODS: Consecutive AD patients were recruited. Swabs and cultures from eczematous areas, disease severity (SCORAD), quality-of-life (Children Dermatology Life Quality Index, CDLQI), skin hydration (SH), and transepidermal water loss (TEWL) were obtained before and 4-week following usage of the emollient...
November 16, 2017: Current Pediatric Reviews
https://www.readbyqxmd.com/read/29149629/development-and-application-of-rti-pcr-method-for-common-food-pathogen-presence-and-quantity-in-beef-sheep-and-chicken-meat
#15
Ismail Akyol
Two different RTi-PCR protocol were designed and quantifications were validated by using various amounts of DNA. Multiplex AG(R)1 and AG(R)2 RTi-PCR amplification reactions quantified successfully for Clostridium perfringens, Enterococcus faecalis, Staphylococcus aureus, Escherichia coli O157:H7 and Salmonella enterica. Using the validated multiplex RTi-PCR reactions, the presence and quantification of pathogens were investigated in 40 beef, 41 sheep and 30 chicken meat samples. Results showed that the existence of C...
November 14, 2017: Meat Science
https://www.readbyqxmd.com/read/29148723/dna-microviscosity-characterization-with-particle-diffusometry-for-downstream-dna-detection-applications
#16
Katherine Noel Clayton, Gregory D Berglund, Jacqueline C Linnes, Tamara L Kinzer-Ursem, Steven T Wereley
Analytical characterization of DNA microviscosity provides critical biophysical insights into nuclear crowding, nucleic acid-based pharmaceutical development, and nucleic acid-based biosensor device design. However, most viscosity characterization methods require large sample volumes and destructive testing. In contrast, particle diffusometry, permits in situ analysis of DNA microviscosity with short measurement times (8 seconds) using small volumes (< 3L) which are compatible with DNA preparatory procedures...
November 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29148294/synthesis-physiochemical-property-and-antimicrobial-activity-of-novel-quaternary-ammonium-salts
#17
Xianrui Xie, Wei Cong, Feng Zhao, Hongjuan Li, Wenyu Xin, Guige Hou, Chunhua Wang
Twenty-four novel 5-phenyl-1,3,4-oxadiazole-2-thiol (POT) analogues, benzo[d]oxazole-2-thiol, benzo[d]thiazole-2-thiol and 5-methyl-1,3,4-thiadiazole-2-thiol-substituted N,N-bis(2-hydroxyethyl) quaternary ammonium salts (QAS) (5a-d, 6a-d, 7a-d, 10a-d, 13a-d, 16a-d) were prepared and characterised by FTIR, NMR and elemental analysis. Part of target compounds (5d, 6d, 7d, 10d, 13d, 16d) displayed potent antimicrobial effect against ten common pathogens (S. aureus, α-H-tococcus, β-H-tococcus, E. coli, P. aeruginosa, Proteus vulgaris, Canidia Albicans, Cytospora mandshurica, Physalospora piricola, Aspergillus niger) and had relatively low cytotoxity against two human cell lines (HaCat and LO2)...
December 2018: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/29147504/immuno-targeting-of-staphylococcus-aureus-via-surface-remodeling-complexes
#18
Mary J Sabulski, Sean E Pidgeon, Marcos M Pires
Agents with novel mechanisms of action are needed to complement traditional antibiotics. Towards these goals, we have exploited the surface-homing properties of vancomycin to tag the surface of Gram-positive pathogens with immune cell attractants in two unique modes. First, vancomycin was conjugated to the small molecule hapten 2,4-dinitrophenol (DNP) to promote bacterial opsonization. Second, we built on these results by improving the tagging specificity and mechanism of incorporation by coupling it to a sortase A substrate peptide...
October 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29146890/effectiveness-of-topical-green-tea-against-multidrug-resistant-staphylococcus-aureus-in-cases-of-primary-pyoderma-an-open-controlled-trial
#19
Nagaraju Umashankar, Belliappa Pemmanda, P Gopkumar, A J Hemalatha, Priya K Sundar, H V Prashanth
BACKGROUND: Antimicrobial activity of green tea against Staphylococcus aureus both in vitro and in vivo has been reported recently. Studies on clinical efficacy and safety of green tea as antibacterial agent against S. aureus in human cases are rare. OBJECTIVES: To evaluate the clinical effectiveness and safety of topical green tea on primary pyoderma caused by S. aureus. We also attempted to determine the minimum inhibitory concentration of green tea against S...
November 14, 2017: Indian Journal of Dermatology, Venereology and Leprology
https://www.readbyqxmd.com/read/29146499/antimicrobial-resistance-and-virulence-genes-profiling-of-methicillin-resistant-staphylococcus-aureus-isolates-in-a-burn-center-a-5-year-study
#20
Bei Jiang, Supeng Yin, Bo You, Yali Gong, Guangtao Huang, Zichen Yang, Yulong Zhang, Yu Chen, Jing Chen, Zhiqiang Yuan, Xiaomei Hu, Yizhi Peng
Methicillin-resistant S. aureus (MRSA) has attracted more and more attention in recent years, especially in burn medical centers. Here we conducted a 5-year period study to evaluate the MRSA infection in our burn center. The staphylococcal chromosomal cassette mec (SCCmec) typing, antimicrobials susceptibility and virulence profiles were also performed among the MRSA isolates. Of the 259 S. aureus isolates, 239 (92.28%) isolates were identified as MRSA. A decreased trend of MRSA isolation rate over time was found (P = 0...
November 13, 2017: Microbial Pathogenesis
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