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https://www.readbyqxmd.com/read/28439396/antibiotics-impact-plant-traits-even-at-small-concentrations
#1
Vanessa Minden, Andrea Deloy, Anna Martina Volkert, Sara Diana Leonhardt, Gesine Pufal
Antibiotics of veterinary origin are released to agricultural fields via grazing animals or manure. Possible effects on human health through the consumption of antibiotic exposed crop plants have been intensively investigated. However, information is still lacking on the effects of antibiotics on plants themselves, particularly on non-crop species, although evidence suggests adverse effects of antibiotics on growth and performance of plants. This study evaluated the effects of three major antibiotics, penicillin, sulfadiazine and tetracycline, on the germination rates and post-germinative traits of four plant species during ontogenesis and at the time of full development...
March 2017: AoB Plants
https://www.readbyqxmd.com/read/28438900/definition-of-the-nature-and-hapten-threshold-of-the-%C3%AE-lactam-antigen-required-for-t-cell-activation-in-vitro-and-in-patients
#2
Xiaoli Meng, Zaid Al-Attar, Fiazia S Yaseen, Rosalind Jenkins, Caroline Earnshaw, Paul Whitaker, Daniel Peckham, Neil S French, Dean J Naisbitt, B Kevin Park
Covalent modification of protein by drugs may disrupt self-tolerance, leading to lymphocyte activation. Until now, determination of the threshold required for this process has not been possible. Therefore, we performed quantitative mass spectrometric analyses to define the epitopes formed in tolerant and hypersensitive patients taking the β-lactam antibiotic piperacillin and the threshold required for T cell activation. A hydrolyzed piperacillin hapten was detected on four lysine residues of human serum albumin (HSA) isolated from tolerant patients...
April 24, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28425718/testing-high-concentrations-of-membrane-active-antibiotic-chlorhexidine-via-computational-titration-and-calorimetry
#3
Brad Van Oosten, Drew Marquardt, Thad A Harroun
Coarse grained strategies for membrane simulations are designed to increase the time and length scales of molecular dynamics simulations. For membrane active antibiotics, the concentration dependence of their action presents a tremendous challenge in simulation scale. In this study we examine the effects of concentration for the popular membrane active antibacterial drug chlorhexidine. It presents an interesting biophysical modelling test, where from experimental experience we know that model membranes of DMPC can absorb very high quantities of the drug without disruption...
April 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28422476/origin-dependent-variations-in-the-atmospheric-microbiome-community-in-eastern-mediterranean-dust-storms
#4
Daniella Gat, Yinon Mazar, Eddie Cytryn, Yinon Rudich
Dust storms transport through the atmosphere microorganisms that can potentially affect human health and the functionality of microbial communities in various environments. Characterizing the dust-borne microbiome in storms of different origin or that followed different paths provides valuable data to improve understanding of global health and environmental impacts. We present a comparative study on the diversity of dust-borne microbial communities in dust storms from three distinct origins-North Africa, Syria and Saudi-Arabia-and compare them with those on dust-free days...
April 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28410366/brief-educational-interventions-to-improve-performance-on-novel-quality-metrics-in-ambulatory-settings-in-kenya-a-multi-site-pre-post-effectiveness-trial
#5
Robert Ryan Korom, Stephanie Onguka, Peter Halestrap, Maureen McAlhaney, Mary Adam
BACKGROUND: The quality of primary care delivered in resource-limited settings is low. While some progress has been made using educational interventions, it is not yet clear how to sustainably improve care for common acute illnesses in the outpatient setting. Management of urinary tract infection is particularly important in resource-limited settings, where it is commonly diagnosed and associated with high levels of antimicrobial resistance. We describe an educational programme targeting non-physician health care providers and its effects on various clinical quality metrics for urinary tract infection...
2017: PloS One
https://www.readbyqxmd.com/read/28402317/simultaneous-and-quantitative-monitoring-of-co-cultured-pseudomonas-aeruginosa-and-staphylococcus-aureus-with-antibiotics-on-a-diffusometric-platform
#6
Chih-Yao Chung, Jhih-Cheng Wang, Han-Sheng Chuang
Successful treatments against bacterial infections depend on antimicrobial susceptibility testing (AST). However, conventional AST requires more than 24 h to obtain an outcome, thereby contributing to high patient mortality. An antibiotic therapy based on experiences is therefore necessary for saving lives and escalating the emergence of multidrug-resistant pathogens. Accordingly, a fast and effective drug screen is necessary for the appropriate administration of antibiotics. The mixed pathogenic nature of infectious diseases emphasizes the need to develop an assay system for polymicrobial infections...
April 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28400213/investigation-of-8-ohdg-cyp1a-hsp70-and-transcriptional-analyses-of-antioxidant-defence-system-in-liver-tissues-of-rainbow-trout-exposed-to-eprinomectin
#7
Gonca Alak, Aslı Çilingir Yeltekin, Ismail Hakkı Tas, Arzu Ucar, Veysel Parlak, Ahmet Topal, Esat Mahmut Kocaman, Muhammed Atamanalp
Eprinomectin (EPM), a member of avermectin family, is a semi-synthetic antibiotic. It has been known that avermectin family enters the aquatic environments and adversely affects the aquatic organisms. Effects of EPM is fully unknown in aquatic organisms especially fish, thus the aim of the present study was to investigate transcriptional changes (sod, cat, gpx) and activities of some antioxidant enzymes (superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT) and malondialdehyde (MDA) levels, oxidative DNA damage (8-hydroxy-2-deoxyguanosine (8-OHdG)) and transcriptional changes of heat shock protein 70 (HSP70), and cytochromes P4501A (CYP1A) in liver tissues of rainbow trout exposed to sublethal EPM concentration (0...
April 8, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28397204/outcomes-of-the-patients-diagnosed-incidentally-appendicitis-during-cesarean-section
#8
Mehmet Kulhan, Nur Gozde Kulhan, Umit Nayki, Cenk Nayki, Pasa Ulug, Nahit Ata, Hulya Toklucu
OBJECTIVES: Appendicitis is the most common condition leading to an intraabdominal operation for a non obstetric problem in pregnancy and diagnosis of appendicitis is complicated by the physiologic and anatomic changes that occur during pregnancy. Although a surgical procedure carries the risk of fetal loss or preterm delivery, delay in diagnosis also increases the risk of complications in both mother and fetus. In this report we present our experience and analyze clinical characteristic and the pregnancy outcomes of appendicitis diagnosed incidentally during cesarean in the third trimester...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28389164/bactericidal-activity-and-post-antibiotic-effect-of-ozenoxacin-against-propionibacterium-acnes
#9
Shoji Kanayama, Kazuaki Okamoto, Fumiaki Ikeda, Ritsuko Ishii, Tatsumi Matsumoto, Naoki Hayashi, Naomasa Gotoh
Ozenoxacin, a novel non-fluorinated topical quinolone, is used for the treatment of acne vulgaris in Japan. We investigated bactericidal activity and post-antibiotic effect (PAE) of ozenoxacin against Propionibacterium acnes, a major causative bacterium of acne vulgaris. The minimum inhibitory concentrations (MICs) of ozenoxacin against 3 levofloxacin-susceptible strains (MIC of levofloxacin; ≤4 μg/mL) and 3 levofloxacin-resistant strains (MIC of levofloxacin; ≥8 μg/mL) ranged from 0.03 to 0.06 μg/mL and from 0...
April 4, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28358014/untargeted-metabolomics-analysis-reveals-key-pathways-responsible-for-the-synergistic-killing-of-colistin-and-doripenem-combination-against-acinetobacter-baumannii
#10
Mohd Hafidz Mahamad Maifiah, Darren J Creek, Roger L Nation, Alan Forrest, Brian T Tsuji, Tony Velkov, Jian Li
Combination therapy is deployed for the treatment of multidrug-resistant Acinetobacter baumannii, as it can rapidly develop resistance to current antibiotics. This is the first study to investigate the synergistic effect of colistin/doripenem combination on the metabolome of A. baumannii. The metabolite levels were measured using LC-MS following treatment with colistin (2 mg/L) or doripenem (25 mg/L) alone, and their combination at 15 min, 1 hr and 4 hr (n = 4). Colistin caused early (15 min and 1 hr) disruption of the bacterial outer membrane and cell wall, as demonstrated by perturbation of glycerophospholipids and fatty acids...
March 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28339792/interference-of-age-and-supplementation-of-direct-fed-microbial-and-essential-oil-in-the-activity-of-digestive-enzymes-and-expression-of-genes-related-to-transport-and-digestion-of-carbohydrates-and-proteins-in-the-small-intestine-of-broilers
#11
M F Fernandez-Alarcon, N Trottier, J P Steibel, R Lunedo, D M B Campos, A M Santana, J M Pizauro, R L Furlan, L R Furlan
The objectives of this study were to describe alterations that age and dietary inclusion of direct-fed microbial (DFM) Bacillus subtilis (BS) and a specific essential oil (EO) blend (carvacrol, cinnamaldehyde, cineol, and pepper extract) causes in the activity of digestive enzymes (maltase: MALT; aminopeptidase-N: APN; intestinal alkaline phosphate: IAP) and expression patterns of genes related to transport (oligopeptide transporter gene: SLC15A1; Na+-dependent glucose and galactose transporter gene: SLC5A1; Na+-independent glucose, galactose, and fructose transporter gene: SLC2A2; ATPase, Na+/K+ transporting gene: ATP1A1) and digestion (aminopeptidase-N gene: ANPEP; maltase-glucoamylase gene: MGAM; Sucrase-isomaltase gene: SI) of carbohydrates and proteins in the small intestine of broilers...
February 23, 2017: Poultry Science
https://www.readbyqxmd.com/read/28336275/structural-characterization-of-purine-nucleoside-phosphorylase-from-human-pathogen-helicobacter-pylori
#12
Zoran Štefanić, Goran Mikleušević, Marija Luić, Agnieszka Bzowska, Ivana Leščić Ašler
Microaerophilic bacterium Helicobacer pylori is a well known human pathogen involved in the development of many diseases. Due to the evergrowing infection rate and increase of H. pylori antibiotic resistence, it is of utmost importance to find a new way to attack and eradicate H. pylori. The purine metabolism in H. pylori is solely dependant on the salvage pathway and one of the key enzymes in this pathway is purine nucleoside phosphorylase (PNP). In this timely context, we report here the basic biochemical and structural characterization of recombinant PNP from the H...
March 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28335779/activity-of-amp2041-against-human-and-animal-multidrug-resistant-pseudomonas-aeruginosa-clinical-isolates
#13
Clotilde Silvia Cabassi, Andrea Sala, Davide Santospirito, Giovanni Loris Alborali, Edoardo Carretto, Giovanni Ghibaudo, Simone Taddei
BACKGROUND: Antimicrobial resistance is a growing threat to public health. Pseudomonas aeruginosa is a relevant pathogen causing human and animal infections, frequently displaying high levels of resistance to commonly used antimicrobials. The increasing difficulty to develop new effective antibiotics have discouraged investment in this area and only a few new antibiotics are currently under development. An approach to overcome antibiotic resistance could be based on antimicrobial peptides since they offer advantages over currently used microbicides...
March 23, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28335466/a-specific-mixture-of-nutrients-suppresses-ovarian-cancer-a-2780-tumor-incidence-growth-and-metastasis-to-lungs
#14
Mohd Waheed Roomi, Tatiana Kalinovsky, Matthias Rath, Aleksandra Niedzwiecki
Ovarian cancer is the deadliest gynecological malignancy in women, and fifth leading cause of death. Despite advances made in chemotherapy and surgery, the average time of clinical remission is approximately 2 years and the 5-year survival rate is 45%. Thus, there is an urgent need for the development of a novel therapeutic approach to ovarian cancer treatment. We investigated the effect of a specific nutrient mixture (EPQ) containing ascorbic acid, lysine, proline, green tea extract, and quercetin on human ovarian cancer cell A-2780 in vivo and in vitro...
March 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28333335/saccharomyces-boulardii-cncm-i-745-restores-intestinal-barrier-integrity-by-regulation-of-e-cadherin-recycling
#15
Chloé Terciolo, Aurélie Dobric, Mehdi Ouaissi, Carole Siret, Gilles Breuzard, Françoise Silvy, Bastien Marchiori, Sébastien Germain, Renaté Bonier, Adel Hama, Roisin Owens, Dominique Lombardo, Véronique Rigot, Frédéric André
Background and Aims: Alteration in intestinal permeability is the main factor underlying the pathogenesis of many diseases affecting the gut, such as inflammatory bowel disease (IBD). Characterization of molecules targeting the restoration of intestinal barrier integrity is therefore vital for the development of alternative therapies. The yeast Saccharomyces boulardii CNCM I-745 (Sb), used to prevent and treat antibiotic-associated infectious and functional diarrhea, may have a beneficial effect in the treatment of IBD...
February 22, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28333193/increased-activity-of-colistin-in-combination-with-amikacin-against-escherichia-coli-co-producing-ndm-5-and-mcr-1
#16
Yu-Feng Zhou, Meng-Ting Tao, Youjun Feng, Run-Shi Yang, Xiao-Ping Liao, Ya-Hong Liu, Jian Sun
Objectives: Colistin and carbapenem are two lines of last-resort antibiotics against lethal infections caused by MDR Gram-negative pathogens. The emergence of carbapenemase-positive Escherichia coli with colistin resistance poses a serious threat to public health worldwide. Here we report, for the first time (to the best of our knowledge), a novel combination therapy used for the treatment of E. coli co-producing MCR-1 and NDM-5. Methods: The MICs of colistin were determined alone and with 1-4 mg/L amikacin...
February 20, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28333189/fully-automated-disc-diffusion-for-rapid-antibiotic-susceptibility-test-results-a-proof-of-principle-study
#17
Michael Hombach, Marion Jetter, Nicolas Blöchliger, Natalia Kolesnik-Goldmann, Erik C Böttger
Background: Antibiotic resistance poses a significant threat to patients suffering from infectious diseases. Early readings of antibiotic susceptibility test (AST) results could be of critical importance to ensure adequate treatment. Disc diffusion is a well-standardized, established and cost-efficient AST procedure; however, its use in the clinical laboratory is hampered by the many manual steps involved, and an incubation time of 16-18 h, which is required to achieve reliable test results...
February 17, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28328652/delayed-second-dose-antibiotics-for-patients-admitted-from-the-emergency-department-with-sepsis-prevalence-risk-factors-and-outcomes
#18
Daniel Leisman, Victor Huang, Qiuping Zhou, Jeanie Gribben, Andrea Bianculli, Michelle Bernshteyn, Mary Frances Ward, Sandra M Schneider
OBJECTIVE: 1) Determine frequency and magnitude of delays in second antibiotic administration among patients admitted with sepsis; 2) Identify risk factors for these delays; and 3) Exploratory: determine association between delays and patient-centered outcomes (mortality and mechanical ventilation after second dose). DESIGN: Retrospective, consecutive sample sepsis cohort over 10 months. SETTING: Single, tertiary, academic medical center. PATIENTS: All patients admitted from the emergency department with sepsis or septic shock (defined: infection, ≥ 2 systemic inflammatory response syndrome criteria, hypoperfusion/organ dysfunction) identified by a prospective quality initiative...
March 21, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28323065/the-impact-of-fecal-sample-processing-on-prevalence-estimates-for-antibiotic-resistant-escherichia-coli
#19
Sylvia Omulo, Eric T Lofgren, Maina Mugoh, Moshe Alando, Joshua Obiya, Korir Kipyegon, Gilbert Kikwai, Wilson Gumbi, Samuel Kariuki, Douglas R Call
Investigators often rely on studies of Escherichia coli to characterize the burden of antibiotic resistance in a clinical or community setting. To determine if prevalence estimates for antibiotic resistance are sensitive to sample handling and interpretive criteria, we collected presumptive E. coli isolates (24 or 95 per stool sample) from a community in an urban informal settlement in Kenya. Isolates were tested for susceptibility to nine antibiotics using agar breakpoint assays and results were analyzed using generalized linear mixed models...
March 18, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28320722/in-vitro-and-in-vivo-antibacterial-activities-of-patchouli-alcohol-a-natural-occurring-tricyclic-sesquiterpene-against-helicobacter-pylori-infection
#20
Y F Xu, D W Lian, Y Q Chen, Y F Cai, Y F Zheng, P L Fan, W K Ren, L J Fu, Y C Li, J H Xie, H Y Cao, B Tan, Z R Su, P Huang
This study further evaluated the in vitro and in vivo anti-Helicobacter pylori activity and potential underlying mechanism of patchouli alcohol (PA), a tricyclic sesquiterpene. In in vitro assay, the capacities of PA to inhibit and kill H. pylori were tested on three standard strains at different pH values and 12 clinical isolates. The effects of PA on H. pylori adhesion (and its alpA, alpB and babA genes), motility (and its flaA and flaB genes), ultrastructure and flagellation were investigated. Moreover, the H...
March 20, 2017: Antimicrobial Agents and Chemotherapy
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