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https://www.readbyqxmd.com/read/29780376/diversity-novelty-and-antimicrobial-activity-of-endophytic-actinobacteria-from-mangrove-plants-in-beilun-estuary-national-nature-reserve-of-guangxi-china
#1
Zhong-Ke Jiang, Li Tuo, Da-Lin Huang, Ilya A Osterman, Anton P Tyurin, Shao-Wei Liu, Dmitry A Lukyanov, Petr V Sergiev, Olga A Dontsova, Vladimir A Korshun, Fei-Na Li, Cheng-Hang Sun
Endophytic actinobacteria are one of the important pharmaceutical resources and well known for producing different types of bioactive substances. Nevertheless, detection of the novelty, diversity, and bioactivity on endophytic actinobacteria isolated from mangrove plants are scarce. In this study, five different mangrove plants, Avicennia marina, Aegiceras corniculatum, Kandelia obovota, Bruguiera gymnorrhiza , and Thespesia populnea , were collected from Beilun Estuary National Nature Reserve in Guangxi Zhuang Autonomous Region, China...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29775296/incorporation-of-a-theranostic-two-tone-luminescent-silver-complex-into-biocompatible-agar-hydrogel-composite-for-the-eradication-of-eskape-pathogens-in-a-skin-and-soft-tissue-infection-model
#2
Miguel N Pinto, Jorge Martinez-Gonzalez, Indranil Chakraborty, Pradip K Mascharak
Microbial invasion and colonization of the skin and underlying soft tissues are among the most common types of infections, becoming increasingly prevalent in hospital settings. Systemic antibiotic chemotherapies are now extremely limited due to emergence of drug-resistant Gram-positive and multidrug-resistant Gram-negative bacterial strains. Topical administration of antimicrobials provides an effective route for the treatment of skin and soft tissue infections (SSTIs). Therefore, the development of new and effective materials for the delivery of these agents is of paramount importance...
May 18, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29753132/prevention-of-eskape-pathogen-biofilm-formation-by-antimicrobial-peptides-wlbu2-and-ll37
#3
Qiao Lin, Berthony Deslouches, Ronald C Montelaro, Y Peter Di
OBJECTIVES: Bacterial biofilm-dependent infections (e.g., cystic fibrosis, surgical sites, and medical implants) are associated with enhanced drug-resistance and thus difficult to eradicate. The goal of this study was to systematically compare three distinct classes of antimicrobial peptides (AMPs) that include the clinically used antibiotic colistin, the natural AMP LL37, the engineered cationic-AMP WLBU2, and four commonly used antibiotics with different bactericidal mechanisms (tobramycin, ciprofloxacin, ceftazidime and vancomycin) for biofilm prevention properties...
May 9, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29738654/-multidrug-resistance-e-eskape-strains-isolated-from-blood-cultures-in-patients-with-cancer
#4
Consuelo Velázquez-Acosta, Patricia Cornejo-Juárez, Patricia Volkow-Fernández
OBJECTIVE: To describe the trend of multidrug resistant (MDR) strains isolated from blood in patients with cancer from 2005 to 2015. MATERIAL AND METHODS: 33 127 blood cultures were processed by retrospective analysis. Identification and antimicrobial sensitivity were performed through automated methods: WaLK away (Siemens Labora- tory Diagnostics) and BD Phoenix (Becton, Dickinson and Company). Resistant strains were determined according to the minimum inhibitory concentration, following the parameters of the Clinical and Laboratory Standards Institute (CLSI)...
March 2018: Salud Pública de México
https://www.readbyqxmd.com/read/29719870/quantifying-the-evolutionary-conservation-of-genes-encoding-multidrug-efflux-pumps-in-the-eskape-pathogens-to-identify-antimicrobial-drug-targets
#5
Lauren E Brooks, Sabah Ul-Hasan, Benjamin K Chan, Mark J Sistrom
Increasing rates of antibiotic-resistant bacterial infection are one of the most pressing contemporary global health concerns. The ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) have been identified as the leading global cause of multidrug-resistant bacterial infections, and overexpression of multidrug efflux (MEX) transport systems has been identified as one of the most critical mechanisms facilitating the evolution of multidrug resistance in ESKAPE pathogens...
May 2018: MSystems
https://www.readbyqxmd.com/read/29718276/the-expanding-horizon-of-alkyl-quinolone-signalling-and-communication-in-polycellular-interactomes
#6
F Jerry Reen, Gerard P McGlacken, Fergal O'Gara
Population dynamics within natural ecosystems is underpinned by microbial diversity and the heterogeneity of host-microbe and microbe-microbe interactions. Small molecule signals that intersperse between species have been shown to govern many virulence-related processes in established and emerging pathogens. Understanding the capacity of microbes to decode diverse languages and adapt to the presence of 'non-self' cells will provide an important new direction to the understanding of the 'polycellular' interactome...
May 1, 2018: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29659861/in-vitro-activity-of-imipenem-relebactam-against-gram-negative-eskape-pathogens-isolated-in-17-european-countries-2015-smart-surveillance-programme
#7
James A Karlowsky, Sibylle H Lob, Krystyna M Kazmierczak, Stephen P Hawser, Sophie Magnet, Katherine Young, Mary R Motyl, Daniel F Sahm
Objectives: Relebactam is an inhibitor of class A β-lactamases, including KPC β-lactamases, and class C β-lactamases, and is currently under clinical development in combination with imipenem. The objective of the current study was to evaluate the in vitro activity of imipenem/relebactam against Gram-negative ESKAPE pathogens (Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa and Enterobacter spp.) submitted by clinical laboratories in 17 European countries to the Study for Monitoring Antimicrobial Resistance Trends (SMART) global surveillance programme in 2015...
April 11, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29643807/antimicrobial-peptides-and-their-therapeutic-potential-for-bacterial-skin-infections-and-wounds
#8
REVIEW
Anja Pfalzgraff, Klaus Brandenburg, Günther Weindl
Alarming data about increasing resistance to conventional antibiotics are reported, while at the same time the development of new antibiotics is stagnating. Skin and soft tissue infections (SSTIs) are mainly caused by the so called ESKAPE pathogens ( Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa , and Enterobacter species) which belong to the most recalcitrant bacteria and are resistant to almost all common antibiotics. S. aureus and P. aeruginosa are the most frequent pathogens isolated from chronic wounds and increasing resistance to topical antibiotics has become a major issue...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29621990/risk-factors-for-long-term-mortality-in-patients-admitted-with-severe-infection
#9
J Francisco, I Aragão, T Cardoso
BACKGROUND: Severe infection is a main cause of mortality. We aim to describe risk factors for long-term mortality among inpatients with severe infection. METHODS: Prospective cohort study in a 600-bed university hospital in Portugal including all patients with severe infection admitted into intensive care, medical, surgical, hematology and nephrology wards over one-year period. The outcome of interest was 5-year mortality following infection. Variables of patient background and infectious episode were studied in association with the main outcome through multiple logistic regression...
April 5, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29553266/antibacterial-activity-affected-by-the-conformational-flexibility-in-glycine-lysine-based-%C3%AE-helical-antimicrobial-peptides
#10
Tomislav Rončević, Damir Vukičević, Nada Ilić, Lucija Krce, Goran Gajski, Marija Tonkić, Ivana Goić-Barišić, Larisa Zoranić, Yogesh Sonavane, Monica Benincasa, Davor Juretić, Ana Maravić, Alessandro Tossi
Antimicrobial peptides often show broad-spectrum activity due to a mechanism based on bacterial membrane disruption, which also reduces development of permanent resistance, a desirable characteristic in view of the escalating multidrug resistance problem. Host cell toxicity however requires design of artificial variants of natural AMPs to increase selectivity and reduce side effects. Kiadins were designed using rules obtained from natural peptides active against E. coli and a validated computational algorithm based on a training set of such peptides, followed by rational conformational alterations...
March 19, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29547971/potential-targets-for-next-generation-anti-microbial-glycoconjugate-vaccines
#11
Francesca Micoli, Paolo Costantino, Roberto Adamo
Cell surface carbohydrates have been proven optimal targets for vaccine development. Conjugation of polysaccharides to a carrier protein triggers a T-cell dependent immune response to the glycan moiety. Licensed glycoconjugate vaccines are produced by chemical conjugation of capsular polysaccharides to prevent meningitis caused by meningococcus, pneumococcus and Haemophilus influenzae type b. However, other classes of carbohydrates (O-antigens, exopolysaccharides, wall/teichoic acids) represent attractive targets for developing vaccines...
March 14, 2018: FEMS Microbiology Reviews
https://www.readbyqxmd.com/read/29540306/distribution-genetic-diversity-and-antibiotic-resistance-of-clinically-important-bacteria-from-the-environment-of-a-tertiary-hospital
#12
Hannah Y P Phoon, Hazilawati Hussin, Baizurah Mohd Hussain, Shu Yong Lim, Jia Jie Woon, Yi Xian Er, Kwai Lin Thong
OBJECTIVES: Hospital environments are potential reservoirs of bacteria associated with nosocomial infections. Here, we determined the distribution of cultivable environmental bacteria of clinical importance from a Malaysian tertiary hospital and to investigate their resistotypes and genotypes. METHODS: Swab and fluid samples (n=358) from healthcare workers' hands, frequently touched surfaces, medical equipment, patients' immediate surroundings, ward sinks and toilets and solutions or fluids of 12 selected wards were collected...
March 11, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29529327/transmission-and-survival-of-carbapenem-resistant-acinetobacter-baumannii-outside-hospital-setting
#13
Ana Kovacic, Martina Seruga Music, Svjetlana Dekic, Marija Tonkic, Anita Novak, Zana Rubic, Jasna Hrenovic, Ivana Goic-Barisic
Acinetobacter baumannii origin and its epidemiology is under a great concern worldwide since this microorganism has become a leading nosocomial pathogen of the 21th century among the "ESKAPE" group of microorganisms. The aim of the study was to monitor and explore the epidemiology of this important hospital pathogen in the second largest clinical university hospital in Croatia. The presence of A. baumannii in hospital wastewater, as a route for possible transmission outside of the hospital setting, as well as its survival in environmental conditions including seawater, was investigated...
December 2017: International Microbiology: the Official Journal of the Spanish Society for Microbiology
https://www.readbyqxmd.com/read/29527285/narrow-spectrum-antibacterial-agents
#14
Roberta J Melander, Daniel V Zurawski, Christian Melander
While broad spectrum antibiotics play an invaluable role in the treatment of bacterial infections, there are some drawbacks to their use, namely selection for and spread of resistance across multiple bacterial species, and the detrimental effect they can have upon the host microbiome. If the causitive agent of the infection is known, the use of narrow-spectrum antibacterial agents has the potential to mitigate some of these issues. This review outlines the advantages and challenges of narrow-spectrum antibacterial agents, discusses the progress that has been made toward developing diagnostics to enable their use, and describes some of the narrow-spectrum antibacterial agents currently being investigated against some of the most clinically important bacteria including Clostridium difficile, Mycobacterium tuberculosis and several ESKAPE pathogens...
2018: MedChemComm
https://www.readbyqxmd.com/read/29439903/antibacterial-activities-of-mono-di-and-tri-substituted-triphenylamine-based-phosphonium-ionic-liquids
#15
Frédéric Brunel, Christelle Lautard, Carole di Giorgio, Frédéric Garzino, Jean-Manuel Raimundo, Jean-Michel Bolla, Michel Camplo
We report the synthesis of new mono, di and tri phosphonium ionic liquids and the evaluation of their antibacterial activities on both Gram-positive and Gram-negative bacteria from the ESKAPE-group. Among the molecules synthesized some of them reveal a strong bactericidal activity (MIC = 0.5 mg/L) for Gram-positive bacteria (including resistant strains) comparable to that of standard antibiotics. A comparative Gram positive and Gram negative antibacterial activities shows that the nature of counter-ion has no significant effects...
March 1, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29410519/rationale-and-design-of-an-inhibitor-of-reca-protein-as-an-inhibitor-of-acinetobacter-baumannii
#16
Vishvanath Tiwari, Monalisa Tiwari, Deepika Biswas
Acinetobacter baumannii is one of the ESKAPE pathogen, which causes pneumonia, urinary tract infections, and is linked to high degree of morbidity and mortality. One-way antibiotic and disinfectant resistance is acquired by the activation of RecA-mediated DNA repair (SOS-response) that maintain ROS-dependent DNA damage caused by these anti-bacterial molecules. To increase the efficacy of different anti-microbial, there is a need to design an inhibitor against RecA of A. baumannii. We have performed homology modeling to generate the structure of RecA, followed by model refinement and validation...
May 2018: Journal of Antibiotics
https://www.readbyqxmd.com/read/29391471/detection-of-16s-rrna-and-kpc-genes-from-complex-matrix-utilizing-a-molecular-inversion-probe-assay-for-next-generation-sequencing
#17
Christopher P Stefan, Adrienne T Hall, Timothy D Minogue
Targeted sequencing promises to bring next-generation sequencing (NGS) into routine clinical use for infectious disease diagnostics. In this context, upfront processing techniques, including pathogen signature enrichment, must amplify multiple targets of interest for NGS to be relevant when applied to patient samples with limited volumes. Here, we demonstrate an optimized molecular inversion probe (MIP) assay targeting multiple variable regions within the 16S ribosomal gene for the identification of biothreat and ESKAPE pathogens in a process that significantly reduces complexity, labor, and processing time...
February 1, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29286008/update-on-the-main-mdr-pathogens-prevalence-and-treatment-options
#18
Silvano Esposito, Giuseppe De Simone
In recent years the proportion of multi-drug resistance (MDR) among the bacterial pathogens causing infections, particularly those acquired in healthcare settings, has risen worryingly worldwide. It poses a serious public health threat as the multiple patterns of resistance limit the effective treatment options for such infections. Although many bacterial species have developed reduced susceptibility to a wide array of antimicrobial molecules, a particular group of pathogens acronymically referred to as ESKAPE (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa and Enterobacter spp...
December 1, 2017: Le Infezioni in Medicina
https://www.readbyqxmd.com/read/29261405/evaluation-of-aminoglycoside-and-carbapenem-resistance-in-a-collection-of-drug-resistant-pseudomonas-aeruginosa-clinical-isolates
#19
Selina Y L Holbrook, Sylvie Garneau-Tsodikova
Pseudomonas aeruginosa, a Gram-negative bacterium, is a member of the ESKAPE pathogens and one of the leading causes of healthcare-associated infections worldwide. Aminoglycosides (AGs) are recognized for their efficacy against P. aeruginosa. The most common resistance mechanism against AGs is the acquisition of AG-modifying enzymes (AMEs) by the bacteria, including AG N-acetyltransferases (AACs), AG O-phosphotransferases (APHs), and AG O-nucleotidyltransferases (ANTs). In this study, we obtained 122 multidrug-resistant P...
December 20, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29261091/association-of-enterococcus-spp-with-severe-combat-extremity-injury-intensive-care-and-polymicrobial-wound-infection
#20
Rae A Heitkamp, Ping Li, Katrin Mende, Samandra T Demons, David R Tribble, Stuart D Tyner
BACKGROUND: Combat-related extremity wound infections can complicate the recovery of injured military personnel. The Enterococcus genus contains both commensal and pathogenic bacteria found in many combat wounds. We describe the patient population susceptible to Enterococcus infection, the characteristics of Enterococcus spp. isolated from combat-related wounds, and the microbiological profile of Enterococcus-positive wounds. METHODS: Patient and culture data were obtained from the Trauma Infectious Disease Outcomes Study...
January 2018: Surgical Infections
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