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https://www.readbyqxmd.com/read/28549490/whole-genome-analysis-reveals-new-insights-into-macrolide-resistance-in-mycoplasma-pneumoniae
#1
Shao Li Li, Hong Mei Sun, Bao Li Zhu, Fei Liu, Han Qing Zhao
OBJECTIVE: Mutations in 23S rRNA gene are known to be associated with macrolide resistance in Mycoplasma pneumoniae (M. pneumoniae). However, these mutations alone do not fully explain the high resistance rates in Asia. The aim of this study was to investigate other possible mutations involved in macrolide resistance in M. pneumoniae. METHODS: The whole genomes of 10 clinical isolates of M. pneumoniae with macrolide resistance were sequenced by Illumina HiSeq2000 platform...
May 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28549097/cluster-of-neisseria-gonorrhoeae-isolates-with-high-level-azithromycin-resistance-and-decreased-ceftriaxone-susceptibility-hawaii-2016
#2
Alan R Katz, Alan Y Komeya, Robert D Kirkcaldy, A Christian Whelen, Olusegun O Soge, John R Papp, Ellen N Kersh, Glenn M Wasserman, Norman P O'Connor, Pamela S O'Brien, Douglas T Sato, Eloisa V Maningas, Gail Y Kunimoto, Juval E Tomas
Background.: The Centers for Disease Control and Prevention (CDC) currently recommends dual therapy with ceftriaxone and azithromycin for gonorrhea to ensure effective treatment and slow emergence of antimicrobial resistance. Since 2013, the prevalence of reduced azithromycin susceptibility increased in the United States; however, these strains were highly susceptible to cephalosporins. We report on a cluster of N. gonorrhoeae isolates demonstrating high-level azithromycin resistance, several of which also demonstrated decreased ceftriaxone susceptibility...
May 26, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28546811/antimicrobial-activity-of-a-cationic-guanidine-compound-against-two-pathogenic-oral-bacteria
#3
E Escamilla-García, A G Alcázar-Pizaña, J C Segoviano-Ramírez, C Del Angel-Mosqueda, A P López-Lozano, E Cárdenas-Estrada, M A De La Garza-Ramos, C E Medina-De La Garza, M Márquez
This study evaluated the potential antimicrobial properties of a polyguanidine (CatDex) on two oral bacteria. Chlorhexidine gluconate 1340 μmoL L(-1) (CHX 0.12%) was used as control. Streptococcus mutans (S. mutans) and Porphyromonas gingivalis (P. gingivalis) were grown in BHI media. Bacterial sensitivity and antimicrobial activity were determined by the minimum inhibitory concentration (MIC) and Kirby-Bauer methods. To study side effects, that is, toxicity, dental pulp stem cells (DPSCs) were used. Fluorometric cytotoxicity and confocal microscopy assays were used in order to test cell viability...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/28545990/retrospective-survey-of-mcr-1-and-mcr-2-in-german-pig-fattening-farms-2011-2012
#4
Nicole Roschanski, Linda Falgenhauer, Mirjam Grobbel, Sebastian Guenther, Lothar Kreienbrock, Can Imirzalioglu, Uwe Roesler
In November 2015, the first plasmid-encoded colistin resistance gene, mcr-1, was described in animals and in humans in China. Subsequently, a multitude of further studies was performed and quite recently the global spread of mcr-1 as well as the occurrence of a new gene variant, mcr-2, was reported. To obtain an overview of the occurrence of the colistin resistance genes mcr-1 and mcr-2 in German pig farms, a retrospective study, including 436 boot swab and pooled faeces samples collected from 58 pig-fattening farms throughout Germany, was performed...
May 22, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28545531/selection-and-characterization-of-alanine-racemase-inhibitors-against-aeromonas-hydrophila
#5
Yaping Wang, Chao Yang, Wen Xue, Ting Zhang, Xipei Liu, Jiansong Ju, Baohua Zhao, Dong Liu
BACKGROUND: Combining experimental and computational screening methods has been of keen interest in drug discovery. In the present study, we developed an efficient screening method that has been used to screen 2100 small-molecule compounds for alanine racemase Alr-2 inhibitors. RESULTS: We identified ten novel non-substrate Alr-2 inhibitors, of which patulin, homogentisic acid, and hydroquinone were active against Aeromonas hydrophila. The compounds were found to be capable of inhibiting Alr-2 to different extents with 50% inhibitory concentrations (IC50) ranging from 6...
May 25, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28545411/antimicrobial-susceptibility-of-neisseria-gonorrhoeae-isolates-from-hefei-2014-2015-genetic-characteristics-of-antimicrobial-resistance
#6
Fa-Xing Jiang, Qian Lan, Wen-Jing Le, Xiao-Hong Su
BACKGROUND: Antimicrobial resistance (AMR) and genetic determinants of resistance of N. gonorrhoeae isolates from Hefei, China, were characterized adding a breadth of information to the molecular epidemiology of gonococcal resistance in China. METHODS: 126 N. gonorrhoeae isolates from a hospital clinic in Hefei, were collected between January, 2014, and November, 2015. The minimum inhibitory concentration (MIC) of N. gonorrhoeae isolates for seven antimicrobials were determined by the agar dilution method...
May 25, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28545327/designing-of-inhibitors-against-ctx-m-15-type-%C3%AE-lactamase-potential-drug-candidate-against-%C3%AE-lactamases-producing-multi-drug-resistant-bacteria
#7
Abid Ali, Danishuddin, Lubna Maryam, Gaurava Srivastava, Ashok Sharma, Asad U Khan
CTX-M-15 are the most prevalent types of β-lactamases that hydrolyze almost all antibiotics of β-lactam group lead to multiple-antibiotic resistance in bacteria. Three β-lactam inhibitors are available for use in combination with different antibiotics of cephalosporine group against the CTX-M-15 producing strains. Therefore, strategies to identify novel anti β-lactamase agents with specific mechanisms of action are theneed of an hour. In this study, we screened three novel non-β-lactaminhibitors against CTX-M-15 by multi-step virtual screening approach...
May 26, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28544962/effect-of-immobilization-on-the-antimicrobial-activity-of-a-cysteine-terminated-antimicrobial-peptide-cecropin-p1-tethered-to-silica-nanoparticle-against-e-coli-o157-h7-edl933
#8
Xi Wu, Pei-Hsun Wei, Xiao Zhu, Mary J Wirth, Arun Bhunia, Ganesan Narsimhan
Antimicrobial peptides (AMPs) have the ability to penetrate the cell membrane, form pores which eventually lead to cell death. Immobilization of AMP on nanoparticles can play a major role in antimicrobial materials, biosensors for pathogen detection and in food safety. The minimum inhibitory concentration (MIC) of free Cecropin P1 (CP1, sequence SWLSTAKKLENSAKKRLSEGIAIAIQGGPR) and adsorbed on silica nanoparticle against E. coli O157:H7 EDL933 were 0.78μg/ml. This was found to be consistent with preservation of α-helical secondary structure of CP1 upon adsorption as indicated by circular dichroism (CD)...
May 17, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28544494/4-substituted-thieno-2-3-d-pyrimidines-as-potent-antibacterial-agents-rational-design-microwave-assisted-synthesis-biological-evaluation-and-molecular-docking-studies
#9
Rupinder K Gill, Harpreet Singh, Tilak Raj, Anuradha Sharma, Gagandeep Singh, Jitender Bariwal
In an attempt to discover a new class of antibacterial agents with improved efficacy and to overcome the drug resistant problems, some novel 4-substituted thieno[2,3-d]pyrimidines have been synthesized via microwave assisted methodology and evaluated for their in vitro antibacterial activity against various pathogenic bacterial strains. Compounds 12b and 13c showed the promising inhibitory potencies against S. aureus, B. subtilis, P. aeruginosa and E. coli with MICs ranging from 2 to 10 μg/ml. Compound 13c was also found to be highly potent against methicillin resistant S...
May 23, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28543603/silver-nanoparticles-antimicrobial-activity-cytotoxicity-and-synergism-with-n-acetyl-cysteine
#10
Selwan Hamed, Mohamed Emara, Riham M Shawky, Ramadan A El-Domany, Tareq Youssef
The fast progression of nanotechnology has led to novel therapeutic interventions. Antimicrobial activities of silver nanoparticles (Ag NPs) were tested against standard ATCC strains of Staphylococcus aureus (ATCC 9144), Escherichia coli (O157:H7), Pseudomonas aeruginosa (ATCC 27853), and Candida albicans (ATCC 90028) in addition to 60 clinical isolates collected from cancer patients. Antimicrobial activity was tested by disk diffusion method and MIC values for Ag NPs alone and in combination with N-acetylcysteine (NAC) against tested pathogens were determined by broth microdilution method...
May 22, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28542873/a-map-of-the-phosphoproteomic-alterations-that-occur-after-a-bout-of-maximal-intensity-contractions
#11
Gregory K Potts, Rachel M McNally, Rocky Blanco, Jae-Sung You, Alexander S Hebert, Michael S Westphall, Joshua J Coon, Troy A Hornberger
The maintenance of skeletal muscle mass is essential for health and quality of life. It is well recognized that maximal-intensity contractions, such as those which occur during resistance exercise, promote an increase in muscle mass. Yet, the molecules that sense the mechanical information and convert it into the signalling events (e.g. phosphorylation) that drive the increase in muscle mass remain undefined. Here we describe a phosphoproteomics workflow to examine the effects of electrically evoked maximal-intensity contractions (MIC) on protein phosphorylation in mouse skeletal muscle...
May 25, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28542866/pharmacokinetic-pharmacodynamic-evaluation-of-marbofloxacin-as-a-single-injection-for-pasteurellaceae-respiratory-infections-in-cattle-using-population-pharmacokinetics-and-monte-carlo-simulations
#12
A Paulin, M Schneider, F Dron, F Woehrle
Population pharmacokinetic of marbofloxacin was investigated with 52 plasma concentration-time profiles obtained after intramuscular administration of Forcyl® in cattle. Animal's status, pre-ruminant, ruminant, or dairy cow, was retained as a relevant covariate for clearance. Monte Carlo simulations were performed using a stratification by status, and 1000 virtual disposition curves were generated in each bovine subpopulation for the recommended dosage regimen of 10 mg/kg as a single injection. The probability of target attainment (PTA) of pharmacokinetic/pharmacodynamic (PK/PD) ratios associated with clinical efficacy and prevention of resistance was determined in each simulated subpopulation...
May 19, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28542279/oligopeptides-as-full-length-new-delhi-metallo-%C3%AE-lactamase-1-ndm-1-inhibitors
#13
Bingzheng Shen, Chengliang Zhu, Xiang Gao, Gang Liu, Jinchun Song, Yan Yu
'Superbug' bacteria producing NDM-1 enzyme causing wide public concern were first detected in a patient who visited India in 2008. It's an effective approach to combining β-lactam antibiotics with NDM-1 inhibitor for treating NDM-1 producing strain infection. In our research, we designed ten oligopeptides, tested IC50 values against NDM-1 enzyme, determined the MIC values of synergistic antibacterial effect and explored the binding model. We found that the oligopeptides 2 (Cys-Phe) and 5 (Cys-Asp) respectively presented IC50 values of 113 μM and 68 μM and also displayed favorable synergistic effects of the inhibitors in combination with ertapenem against genetic engineering-host E...
2017: PloS One
https://www.readbyqxmd.com/read/28541510/optimization-of-linezolid-therapy-in-the-critically-ill-the-effect-of-adjusted-infusion-regimens
#14
Max Taubert, Johannes Zander, Sebastian Frechen, Christina Scharf, Lorenz Frey, Michael Vogeser, Uwe Fuhr, Michael Zoller
Objectives: Insufficient linezolid levels, which are associated with a poorer outcome, are often observed in ICU patients who receive standard dosing. Although strategies to overcome these insufficient levels have been discussed, appropriate alternative dosing regimens remain to be identified. Methods: Various infusion regimens (1200-3600 mg/day; q6h, q8h, q12h and continuous) were simulated in 67 000 ICU patients. The probability of attaining pharmacodynamic targets ( T >MIC ≥85%, AUC/MIC ≥100, cumulative fraction of response for Staphylococcus aureus and Enterococcus spp...
May 24, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28541427/percutaneous-cannulation-for-cardiopulmonary-bypass-in-minimally-invasive-surgery-is-associated-with-reduced-groin-complications
#15
Alexandros Moschovas, Paulo A Amorim, Mariana Nold, Gloria Faerber, Mahmoud Diab, Tobias Buenger, Torsten Doenst
OBJECTIVES: Femoral cutdown is standard in most centres if groin cannulation is used for cardiopulmonary bypass in minimally invasive cardiac surgery (MICS). Arterial closure devices (ACDs) allow placement of larger cannulas percutaneously, but its benefit in MICS is unclear. We assessed our results with percutaneous groin cannulation using ACDs in comparison with conventional surgical access in patients undergoing MICS. METHODS: We reviewed 445 consecutive patients having undergone MICS between October 2010 and March 2015...
May 25, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28541127/screening-of-plants-with-antimicrobial-activity-against-enterobacteria-pseudomonas-spp-and-staphylococcus-spp
#16
Camila Miorelli Girondi, Analu Barros de Oliveira, Jackeline Alves Prado, Cristiane Yumi Koga-Ito, Aline Chiodi Borges, Alberto Carlos Botazzo Delbem, Daniel Freitas Alves Pereira, Marcos José Salvador, Fernanda Lourenção Brighenti
AIM: This study screened plants for antibacterial properties against bacteria of medical importance. MATERIALS & METHODS: 60 extracts were obtained from the leaves of ten plants (Jatropha weddelliana, Attalea phalerata, Buchenavia tomentosa, Croton doctoris, Mouriri elliptica, Mascagnia benthamiana, Senna aculeata, Unonopis guatterioides, Allagoptera leucocalyx and Bactris glaucescens) using different extraction methods: A) Ethanol 70°C/72 h; B) Water/5 min/100°C; C) Water/1 h/55°C; D) Water/72 h; E) Hexane/72 h and F) Ethanol 99°C/72 h...
May 25, 2017: Future Microbiology
https://www.readbyqxmd.com/read/28539745/effect-of-tamarindus-indica-l-and-manihot-esculenta-extracts-on-antibiotic-resistant-bacteria
#17
Zenon Machado Lima, Lenilson Santos da Trindade, Genelane Cruz Santana, Francine Ferreira Padilha, Marcelo da Costa Mendonça, Luiz Pereira da Costa, Jorge A López, Maria Lucila Hernández Macedo
BACKGROUND: The chemical composition of plants used in traditional medicine exhibits biologically active compounds, such as tannins, flavonoids, and alkaloids and becomes a promising approach to treat microbial infections, mainly with drug-resistant bacteria. OBJECTIVE: The aim of the present study was to evaluate the hydroethanolic leaf extracts of Tamarindus indica (tamarind) and Manihot esculenta (cassava) as antimicrobial potential against Pseudomonas aeruginosa clinical isolated and Methicillin-resistant Staphylococcus aureus...
April 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28539734/honey-and-health-a-review-of-recent-clinical-research
#18
REVIEW
Saeed Samarghandian, Tahereh Farkhondeh, Fariborz Samini
Honey is one of the most appreciated and valued natural products introduced to humankind since ancient times. Honey is used not only as a nutritional product but also in health described in traditional medicine and as an alternative treatment for clinical conditions ranging from wound healing to cancer treatment. The aim of this review is to emphasize the ability of honey and its multitude in medicinal aspects. Traditionally, honey is used in the treatment of eye diseases, bronchial asthma, throat infections, tuberculosis, thirst, hiccups, fatigue, dizziness, hepatitis, constipation, worm infestation, piles, eczema, healing of ulcers, and wounds and used as a nutritious supplement...
April 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28539728/anti-quorum-sensing-activity-of-forsythia-suspense-on-chromobacterium-violaceum-and-pseudomonas-aeruginosa
#19
An Zhang, Wei-Hua Chu
BACKGROUND: Quorum sensing (QS) plays an important role in the production of virulence factors and pathogenicity in Pseudomonas aeruginosa, and the interruption of QS will be a hopeful pathway to combat bacterial infection. OBJECTIVE: In this study, we selected Forsythia suspense (Thunb.) Vahl from traditional Chinese herbal medicines for its anti-QS activity. MATERIALS AND METHODS: Anti-QS of F. suspense extracts (FSE) was monitored using the Chromobacterium violaceum 12472 bioassay...
April 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28539723/antimicrobial-and-anti-inflammatory-effects-of-ethanol-extract-of-corylopsis-coreana-uyeki-flos
#20
Da-Eon Park, In-Soo Yoon, Jung-Eun Kim, Ji-Hye Seo, Jin-Cheol Yoo, Chun-Sik Bae, Chang-Dai Lee, Dae-Hun Park, Seung-Sik Cho
BACKGROUND: Corylopsis coreana Uyeki (Hamamelidaceae) is a medicinal plant cultivated in Northeast Asia. Previously, we have reported that an ethanol extract of Corylopsis coreana Uyeki flos (ECCF) contains four active compounds with antioxidant activity. OBJECTIVE: The aim of this study was to investigate the antimicrobial spectrum against infectious bacteria and anti-inflammatory effect of ECCF in a mouse model of acute local inflammation. MATERIALS AND METHODS: In vitro antimicrobial susceptibility was evaluated using standard plate assay technique...
April 2017: Pharmacognosy Magazine
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