keyword
MENU ▼
Read by QxMD icon Read
search

Multidrug-resistant bacteria

keyword
https://www.readbyqxmd.com/read/29469596/genome-scale-metabolic-models-as-platforms-for-identification-of-novel-genes-as-antimicrobial-drug-targets
#1
Bashir Sajo Mienda, Rabiu Salihu, Aliyu Adamu, Shehu Idris
The growing number of multidrug-resistant pathogenic bacteria is becoming a world leading challenge for the scientific community and for public health. However, advances in high-throughput technologies and whole-genome sequencing of bacterial pathogens make the construction of bacterial genome-scale metabolic models (GEMs) increasingly realistic. The use of GEMs as an alternative platforms will expedite identification of novel unconditionally essential genes and enzymes of target organisms with existing and forthcoming GEMs...
February 22, 2018: Future Microbiology
https://www.readbyqxmd.com/read/29468195/transcriptome-profiling-reveals-interplay-of-multifaceted-stress-response-in-escherichia-coli-on-exposure-to-glutathione-and-ciprofloxacin
#2
Manish Goswami, Akkipeddi Venkat Satya Surya Narayana Rao
We have previously reported that supplementation of exogenous glutathione (GSH) promotes ciprofloxacin resistance in Escherichia coli by neutralizing antibiotic-induced oxidative stress and by enhancing the efflux of antibiotic. In the present study, we used a whole-genome microarray as a tool to analyze the system-level transcriptomic changes of E. coli on exposure to GSH and/or ciprofloxacin. The microarray data revealed that GSH supplementation affects redox function, transport, acid shock, and virulence genes of E...
January 2018: MSystems
https://www.readbyqxmd.com/read/29466000/python-cathelicidin-cathpb1-protects-against-multidrug-resistant-staphylococcal-infections-by-antimicrobial-immunomodulatory-duality
#3
Shasha Cai, Xue Qiao, Lan Feng, Nannan Shi, Hui Wang, Huaixin Yang, Zhilai Guo, Mengke Wang, Yan Chen, Yipeng Wang, Haining Yu
Multidrug-resistant Staphylococcus aureus, including MRSA (Methicillin-Resistant) and VRSA (Vancomycin-resistant), causes serious healthcare-associated infections, even sepsis and death. Here, we identified six novel cathelicidins (CATHPb1-6) from Python bivittatu, and CATHPb1 displayed the best in vitro pharmacological and toxicological profile. We further show that CATHPb1 exhibited evident protection in mice MRSA/VRSA infection models, either given 24h before or 4h after infection. The protection was all effective through different administration routes, but was blocked by in vivo depletion of monocyte/macrophages or neutrophils...
February 21, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29465814/claramines-a-new-class-of-broad-spectrum-antimicrobial-agents-with-bimodal-activity
#4
Marine Blanchet, Diane Borselli, Anne Rodallec, Franck Peiretti, Nicolas Vidal, Jean Michel Bolla, Carole Digiorgio, Kelly Morrison, William Wuest, Jean Michel Brunel
The emergence of multidrug resistant bacteria/pathogens has highlighted the need for the development of new antibiotics. In this manuscript, we report herein our results dealing with the broad spectrum of antibacterial activity against both sensitive and resistant Gram-negative and Gram-positive bacterial strains of an easily prepared water soluble polyaminosterol compound namely claramine A1. We will also demonstrate its peculiar mechanism of action (different from all the well-known classes of antibiotics) towards Gram-negative and Gram-positive bacteria...
February 21, 2018: ChemMedChem
https://www.readbyqxmd.com/read/29464798/bioactive-compounds-from-the-african-medicinal-plant-cleistochlamys-kirkii-as-resistance-modifiers-in-bacteria
#5
Annamária Kincses, Borisz Varga, Ákos Csonka, Shirley Sancha, Silva Mulhovo, Ana Margarida Madureira, Maria-José U Ferreira, Gabriella Spengler
Cleistochlamys kirkii (Benth) Oliv. (Annonaceae) is a medicinal plant traditionally used in Mozambique to treat infectious diseases. The aim of this study was to find resistance modifiers in C. kirkii for Gram-positive and Gram-negative model bacterial strains. One of the most important resistance mechanisms in bacteria is the efflux pump-related multidrug resistance. Therefore, polycarpol (1), three C-benzylated flavanones (2-4), and acetylmelodorinol (5) were evaluated for their multidrug resistance-reverting activity on methicillin-susceptible and methicillin-resistant Staphylococcus aureus and Escherichia coli AG100 and AG100 A strains overexpressing and lacking the AcrAB-TolC efflux pump system...
February 21, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29463654/emergence-of-an-extensively-drug-resistant-salmonella-enterica-serovar-typhi-clone-harboring-a-promiscuous-plasmid-encoding-resistance-to-fluoroquinolones-and-third-generation-cephalosporins
#6
Elizabeth J Klemm, Sadia Shakoor, Andrew J Page, Farah Naz Qamar, Kim Judge, Dania K Saeed, Vanessa K Wong, Timothy J Dallman, Satheesh Nair, Stephen Baker, Ghazala Shaheen, Shahida Qureshi, Mohammad Tahir Yousafzai, Muhammad Khalid Saleem, Zahra Hasan, Gordon Dougan, Rumina Hasan
Antibiotic resistance is a major problem in Salmonella enterica serovar Typhi, the causative agent of typhoid. Multidrug-resistant (MDR) isolates are prevalent in parts of Asia and Africa and are often associated with the dominant H58 haplotype. Reduced susceptibility to fluoroquinolones is also widespread, and sporadic cases of resistance to third-generation cephalosporins or azithromycin have also been reported. Here, we report the first large-scale emergence and spread of a novel S Typhi clone harboring resistance to three first-line drugs (chloramphenicol, ampicillin, and trimethoprim-sulfamethoxazole) as well as fluoroquinolones and third-generation cephalosporins in Sindh, Pakistan, which we classify as extensively drug resistant (XDR)...
February 20, 2018: MBio
https://www.readbyqxmd.com/read/29463546/treatment-with-atorvastatin-provides-additional-benefits-to-imipenem-in-a-model-of-gram-negative-pneumonia-induced-by-klebsiella-pneumoniae-in-mice
#7
Talles Prosperi de Paula, Patrícia Campi Santos, Raquel Duque do Nascimento Arifa, Angélica T Vieira, Ludmila de Matos Baltazar, Thiago Vinícius Ávila, Caio Tavares Fagundes, Zélia Menezes Garcia, Renata Lacerda Lima, Mauro Martins Teixeira, Danielle G Souza
The clinical pathogen Klebsiella pneumoniae is a relevant cause of nosocomial infections and resistance to current treatment with carbapenem antibiotics is becoming a significant problem. Statins are inhibitors of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) used for controlling plasma cholesterol levels. There is clinical evidence showing other effects of statins, including decrease of lung inflammation. In the current study, we show that pretreatment with atorvastatin markedly attenuated lung injury, which was correlated with a reduction in the cellular influx into the alveolar space and lungs and down-modulation of the production of pro-inflammatory mediators in the initial phase of infection in C57BL/6 mice with K...
February 20, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29463543/mesoscopic-energy-minimization-drives-pseudomonas-aeruginosa-biofilm-morphologies-and-consequent-stratification-of-antibiotic-activity-based-on-cell-metabolism
#8
M V Sheraton, K H Yam, C H Tan, H S Oh, E Mancini, L Yang, S A Rice, P M A Sloot
Segregation of bacteria based on their metabolic activity in biofilms plays an important role in the development of antibiotic drug resistance. Mushroom-shaped biofilm structures, which are reported for many bacteria, exhibit topographically varying levels of multiple drug resistance from the cap of the mushroom to its stalk. Understanding the dynamics behind the formation of such structures can aid in design of drug delivery systems, antibiotics, or physical systems for removal of biofilms. We explore the development of metabolically heterogenous Pseudomonas aeruginosa biofilms using numerical models and laboratory knock-out experiments on wild-type and chemotaxis deficient mutants...
February 20, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29463301/molecular-detection-of-colistin-resistance-genes-mcr-1-to-mcr-5-in-human-vaginal-swabs
#9
Jilei Zhang, Li Chen, Jiawei Wang, Patrick Butaye, Ke Huang, Haixiang Qiu, Xiaomei Zhang, Weijuan Gong, Chengming Wang
OBJECTIVE: Colistin resistance has emerged worldwide and has been threatening the efficacy of one of the last-resort antimicrobials used for treatment of multidrug resistant Gram-negative bacteria. While five colistin resistance genes (mcr-1, mcr-2, mcr-3, mcr-4 and mcr-5) have been described, few data are available on the prevalence of mcr-genes other than mcr-1 in human samples. RESULTS: In this study, the presence of five currently described colistin resistance genes (mcr 1-5) in vaginal swabs of women undergoing infertility evaluation was reported...
February 20, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29462787/mechanistic-insights-into-transferable-polymyxin-resistance-among-gut-bacteria
#10
Yongchang Xu, Jingxia Lin, Tao Cui, Swaminath Srinivas, Youjun Feng
Polymyxins such as colistin are antibiotics used as a final line of defense in the management of infections with multidrug-resistant Gram-negative bacteria. Although natural resistance to polymyxins is rare, the discovery of a mobilized colistin resistance gene ( mcr-1 ) in gut bacteria has raised significant concern. As an intramembrane enzyme, MCR-1 catalyzes the transfer of phosphoethanolamine (PEA) to the 1 (or 4')-phosphate group of the lipid A moiety of lipopolysaccharide (LPS), thereby conferring colistin resistance...
February 9, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29458422/the-antibiotic-resistome-and-microbiota-landscape-of-refugees-from-syria-iraq-and-afghanistan-in-germany
#11
Robert Häsler, Christian Kautz, Ateequr Rehman, Rainer Podschun, Volker Gassling, Pius Brzoska, Jon Sherlock, Jan-Thorsten Gräsner, Gesine Hoppenstedt, Sabine Schubert, Astrid Ferlinz, Wolfgang Lieb, Matthias Laudes, Femke-Anouska Heinsen, Jens Scholz, Dag Harmsen, Andre Franke, Swantje Eisend, Thomas Kunze, Helmut Fickenscher, Stephan Ott, Philip Rosenstiel, Stefan Schreiber
BACKGROUND: Multidrug-resistant bacteria represent a substantial global burden for human health, potentially fuelled by migration waves: in 2015, 476,649 refugees applied for asylum in Germany mostly as a result of the Syrian crisis. In Arabic countries, multiresistant bacteria cause significant problems for healthcare systems. Currently, no data exist describing antibiotic resistances in healthy refugees. Here, we assess the microbial landscape and presence of antibiotic resistance genes (ARGs) in refugees and German controls...
February 20, 2018: Microbiome
https://www.readbyqxmd.com/read/29457919/enterobacteriaceae-antibiotic-resistance-in-ready-to-eat-foods-collected-from-hospital-and-community-canteens-analysis-of-prevalence
#12
Sara Vincenti, Matteo Raponi, Romina Sezzatini, Gabriele Giubbini, Patrizia Laurenti
Foodborne diseases and antibiotic resistance are serious widespread health problems in the contemporary world. In this study, we compared the microbiological quality of ready-to-eat (RTE) foods found in community canteens versus hospital canteens in Rome, Italy, focusing on detection and quantification of Enterobacteriaceae and the antibiotic resistance of these bacteria. Our findings show a remarkable difference in Enterobacteriaceae contamination between RTE foods distributed in community canteens (33.5% of samples) and those distributed in hospital canteens (5...
February 19, 2018: Journal of Food Protection
https://www.readbyqxmd.com/read/29456528/mutation-in-esbl-plasmid-from-escherichia-coli-o104-h4-leads-autoagglutination-and-enhanced-plasmid-dissemination
#13
Mickaël Poidevin, Mari Sato, Ipek Altinoglu, Manon Delaplace, Chikara Sato, Yoshiharu Yamaichi
Conjugative plasmids are one of the main driving force of wide-spreading of multidrug resistance (MDR) bacteria. They are self-transmittable via conjugation as carrying the required set of genes and cis -acting DNA locus for direct cell-to-cell transfer. IncI incompatibility plasmids are nowadays often associated with extended-spectrum beta-lactamases producing Enterobacteria in clinic and environment. pESBL-EA11 was isolated from Escherichia coli O104:H4 outbreak strain in Germany in 2011. During the previous study identifying transfer genes of pESBL-EA11, it was shown that transposon insertion at certain DNA region of the plasmid, referred to as Hft, resulted in great enhancement of transfer ability...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29455386/-some-current-concepts-in-antibacterial-drug-discovery
#14
REVIEW
Lasse van Geelen, Dieter Meier, Nidja Rehberg, Rainer Kalscheuer
The rise of multidrug resistance in bacteria rendering pathogens unresponsive to many clinical drugs is widely acknowledged and considered a critical global healthcare issue. There is broad consensus that novel antibacterial chemotherapeutic options are extremely urgently needed. However, the development pipeline of new antibacterial drug lead structures is poorly filled and not commensurate with the scale of the problem since the pharmaceutical industry has shown reduced interest in antibiotic development in the past decades due to high economic risks and low profit expectations...
February 17, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29454787/trans-envelope-multidrug-efflux-pumps-of-gram-negative-bacteria-and-their-synergism-with-the-outer-membrane-barrier
#15
Helen I Zgurskaya, Valentin V Rybenkov, Ganesh Krishnamoorthy, Inga V Leus
Antibiotic resistance is a serious threat to public health. Significant efforts are currently directed toward containment of the spread of resistance, finding new therapeutic options concerning resistant human and animal pathogens, and addressing the gaps in the fundamental understanding of mechanisms of resistance. Experimental data and kinetic modeling revealed a major factor in resistance, the synergy between active efflux and the low permeability barrier of the outer membrane, which dramatically reduces the intracellular accumulation of many antibiotics...
February 15, 2018: Research in Microbiology
https://www.readbyqxmd.com/read/29449172/pmex01-a-70kb-plasmid-isolated-from-escherichia-coli-that-confers-resistance-to-multiple-%C3%AE-lactam-antibiotics
#16
Jose Luis Hernandez-Flores, Juan Caballero Pérez, Carlos Saldaña Gutiérrez, Andrés Cruz Hernández, Gerardo Soto Alonso, Sergio Pacheco Hernández, Sergio Romero Gómez, Francisco Fernández, Achim M Loske, Juan Campos Guillén
Multidrug-resistant microorganisms are of great concern to public health. Genetic mobile elements, such as plasmids, are among the most relevant mechanisms by which bacteria achieve this resistance. We obtained an Escherichia coli strain CM6, isolated from cattle presenting severe diarrheic symptoms in the State of Querétaro, Mexico. It was found to contain a 70kb plasmid (pMEX01) with a high similarity to the pHK01-like plasmids that were previously identified and described in Hong Kong. Analysis of the pMEX01 sequence revealed the presence of a bla CTX-M-14 gene, which is responsible for conferring resistance to multiple β-lactam antibiotics...
February 3, 2018: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29447024/microbiology-and-clinical-outcomes-of-puerperal-sepsis-a-prospective-cohort-study
#17
Rumbidzai Majangara, Muchabayiwa Francis Gidiri, Zvavahera Mike Chirenje
The objectives of this study were to determine the identity and antibacterial susceptibility profiles of bacteria colonising the female genital tract and blood stream and their association with clinical outcomes in women with puerperal sepsis. A prospective descriptive cohort study was conducted at two tertiary hospitals in Zimbabwe. Endocervical swabs and blood were collected for culture and susceptibility testing from 151 consecutive women who met the World Health Organisation criteria for puerperal sepsis...
February 15, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29446811/nosocomial-infections-current-situation-in-a-resuscitation-unit
#18
Ahlem Trifi, Sami Abdellatif, Mouna Oueslati, Meriem Zribi, Foued Daly, Rochdi Nasri, Rahma Mannai, Chadlia Fandri, Salah Ben Lakhal
BACKGROUND: The nosocomial infection (NI) is defined as an infection that is not present or incubating on admission in establishment of care. It can be caused by the patient's germs, care personnel or hospital environment. Multidrug resistant (MDR) bacteria are particularly common in intensive care units that lead to a serious infections and increase morbidity, mortality and cost of care. PURPOSE: To identify the epidemiological characteristics of NI, the predisposing factors, the antimicrobial sensitivity pattern of isolated bacteria and the impact on morbidity and mortality...
March 2017: La Tunisie Médicale
https://www.readbyqxmd.com/read/29446459/the-challenge-of-converting-gram-positive-only-compounds-into-broad-spectrum-antibiotics
#19
REVIEW
Michelle F Richter, Paul J Hergenrother
Multidrug resistant Gram-negative bacterial infections are on the rise, and there is a lack of new classes of drugs to treat these pathogens. This drug shortage is largely due to the challenge of finding antibiotics that can permeate and persist inside Gram-negative species. Efforts to understand the molecular properties that enable certain compounds to accumulate in Gram-negative bacteria based on retrospective studies of known antibiotics have not been generally actionable in the development of new antibiotics...
February 15, 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29436593/l%C3%A2-histidine-augments-the-oxidative-damage-against-gram%C3%A2-negative-bacteria-by-hydrogen-peroxide
#20
Tamiko Nagao, Haruyuki Nakayama-Imaohji, Miad Elahi, Ayano Tada, Emika Toyonaga, Hisashi Yamasaki, Katsuichiro Okazaki, Hirokazu Miyoshi, Koichiro Tsuchiya, Tomomi Kuwahara
Excessive damage to DNA and lipid membranes by reactive oxygen species reduces the viability of bacteria. In the present study, the proliferation of recA‑deficient Escherichia coli strains was revealed to be inhibited by 1% L‑histidine under aerobic conditions. This inhibition of proliferation was not observed under anaerobic conditions, indicating that L‑histidine enhances oxidative DNA damage to E. coli cells. Reverse transcription‑quantitative polymerase chain reaction analysis demonstrated that the expression of recA in E...
February 7, 2018: International Journal of Molecular Medicine
keyword
keyword
51882
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"