keyword
MENU ▼
Read by QxMD icon Read
search

time dependent antibiotics

keyword
https://www.readbyqxmd.com/read/28630418/replacing-a-century-old-technique-modern-spectroscopy-can-supplant-gram-staining
#1
Shirly Berezin, Yaron Aviv, Hagit Aviv, Elad Goldberg, Yaakov R Tischler
Rapid and accurate Gram differentiation is paramount as the first step of pathogen identification and antibiotics administration. However, the current method requires additional reagents, is time-consuming, and is operator dependent. Here we show the principle of tip enhanced Raman spectroscopy (TERS) can differentiate between Gram negative and positive species, by detecting the changes in tip-enhancement in the Raman scattering from the bacteria's lipid-bilayer membrane, which specifically enhances Gram negative bacteria...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630197/pharmacodynamics-of-cefepime-combined-with-tazobactam-against-clinically-relevant-enterobactereaceae-in-a-neutropenic-mouse-thigh-model
#2
Maria J Melchers, Anita C van Mil, Claudia Lagarde, Jan den Hartigh, Johan W Mouton
The lack of new antibiotics prompted the investigation of the combination of two existing agents cefepime, a broad-spectrum cephalosporin and tazobactam to broaden its efficacy against extended-spectrum beta-lactamase producing Enterobacteriaceae. We determined the pharmacokinetic and pharmacodynamic properties of the combination in a murine neutropenic thigh model in order to establishing its exposure- response relationships (ERR). The PK of cefepime was determined for five doses; that of tazobactam was determined in earlier studies (Melchers et al Antimicrob...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28616631/the-effect-of-emodin-on-staphylococcus-aureus-strains-in-planktonic-form-and-biofilm-formation-in-vitro
#3
Xin Yan, Shanshan Gu, Yunjia Shi, Xingyang Cui, Shanshan Wen, Junwei Ge
Staphylococcus aureus (S. aureus) is a Gram-positive pathogen and forms biofilm easily. Bacteria inside biofilms display an increased resistance to antibiotics and disinfectants. The objective of the current study was to assess the antimicrobial activities of emodin, 1,2,8-trihydroxy-6-methylanthraquinone, an anthraquinone derivative isolated from Polygonum cuspidatum and Rheum palmatum, against S. aureus CMCC26003 grown in planktonic and biofilm cultures in vitro. In addition, a possible synergistic effect between emodin and berberine chloride was evaluated...
June 14, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28615301/irf4-dependent-cd103-cd11b-dendritic-cells-and-the-intestinal-microbiome-regulate-monocyte-and-macrophage-activation-and-intestinal-peristalsis-in-postoperative-ileus
#4
Judith-Mira Pohl, Sebastian Gutweiler, Stephanie Thiebes, Julia K Volke, Ludger Klein-Hitpass, Denise Zwanziger, Matthias Gunzer, Steffen Jung, William W Agace, Daniel Robert Engel, Christian Kurts
OBJECTIVE: Postoperative ileus (POI), the most frequent complication after intestinal surgery, depends on dendritic cells (DCs) and macrophages. Here, we have investigated the mechanism that activates these cells and the contribution of the intestinal microbiota for POI induction. DESIGN: POI was induced by manipulating the intestine of mice, which selectively lack DCs, monocytes or macrophages. The disease severity in the small and large intestine was analysed by determining the distribution of orally applied fluorescein isothiocyanate-dextran and by measuring the excretion time of a retrogradely inserted glass ball...
June 14, 2017: Gut
https://www.readbyqxmd.com/read/28612655/exploiting-antidiabetic-activity-of-silver-nanoparticles-synthesized-using-punica-granatum-leaves-and-anticancer-potential-against-human-liver-cancer-cells-hepg2
#5
Rijuta G Saratale, Han Seung Shin, Gopalakrishnan Kumar, Giovanni Benelli, Dong-Su Kim, Ganesh D Saratale
This study first time reports the novel synthesis of silver nanoparticles (AgNPs) using a Punica granatum leaf extract (PGE). The synthesized AgNPs were characterized by various analytical techniques including UV-Vis, Fourier transform infrared (FTIR), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy and energy-dispersive spectra (FESEM-EDS) and high-resolution transmission electron microscopy (HRTEM). FTIR analysis revealed that the involvement of biological macromolecules of P...
June 14, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28608480/sgk1-nedd4-2-signaling-pathway-regulates-the-activity-of-human-organic-anion-transporters-3
#6
Haoxun Wang, Guofeng You
Human organic anion transporter 3 (hOAT3) is localized at the basolateral membrane of renal proximal tubule cells and facilitates renal secretion of numerous clinical drugs, including anti-HIV therapeutics, anti-tumor drugs, antibiotics, antihypertension drugs, and anti-inflammatories. In the present study, we explored the role of serum and glucocorticoid-inducible kinase 1 (sgk1) in the regulation of hOAT3. We showed that over-expression of sgk1 in hOAT3-expressing cells stimulated hOAT3 transport activity by enhancing the transporter expression at the plasma membrane, kinetically reflected as an increased maximal transport velocity Vmax without substantial change in substrate-binding affinity Km ...
June 13, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/28593194/fine-scale-structure-analysis-shows-epidemic-patterns-of-clonal-complex-95-a-cosmopolitan-escherichia-coli-lineage-responsible-for-extraintestinal-infection
#7
David M Gordon, Sarah Geyik, Olivier Clermont, Claire L O'Brien, Shiwei Huang, Charmalie Abayasekara, Ashwin Rajesh, Karina Kennedy, Peter Collignon, Paul Pavli, Christophe Rodriguez, Brian D Johnston, James R Johnson, Jean-Winoc Decousser, Erick Denamur
The Escherichia coli lineage known as clonal complex 95 (CC95) is a cosmopolitan human-associated lineage responsible for a significant fraction of extraintestinal infections of humans. Whole-genome sequence data of 200 CC95 strains from various origins enabled determination of the CC95 pangenome. The pangenome analysis revealed that strains of the complex could be assigned to one of five subgroups that vary in their serotype, extraintestinal virulence, virulence gene content, and antibiotic resistance gene profile...
May 2017: MSphere
https://www.readbyqxmd.com/read/28587559/species-differences-in-ciprofloxacin-resistance-among-gram-negative-bacteria-can-anti-mutant-ratios-of-the-area-under-the-concentration-time-curve-to-the-mic-be-achieved-clinically
#8
Elena N Strukova, Yury A Portnoy, Stephen H Zinner, Alexander A Firsov
To explore if the 'anti-mutant' ratios of 24-h area under the concentration-time curve (AUC24) to the MIC overlap the clinically attainable AUC24/MICs, the selection of ciprofloxacin-resistant Escherichia coli, Pseudomonas aeruginosa and Klebsiella pneumoniae mutants was studied in dynamic model that simulates human pharmacokinetics of ciprofloxacin. Four strains each of E. coli and P. aeruginosa and three strains of K. pneumoniae were exposed to ciprofloxacin over a 50-400-fold range of the AUC24/MIC ratio...
June 6, 2017: Journal of Chemotherapy
https://www.readbyqxmd.com/read/28587195/the-use-of-chemoprophylaxis-after-floods-to-reduce-the-occurrence-and-impact-of-leptospirosis-outbreaks
#9
Maria Cristina Schneider, Jorge Velasco-Hernandez, Kyung-Duk Min, Deise Galan Leonel, David Baca-Carrasco, Matthew E Gompper, Rudy Hartskeerl, Claudia Munoz-Zanzi
Record-breaking and devastating rainfall events have occurred in the past decade. Rain and floods are considered the main risk factors for leptospirosis and several outbreaks have been reported following extreme weather events. In such situations, one possible intervention to prevent leptospirosis cases in high-risk groups is the use of chemoprophylaxis. However, not enough evidence of its effect is available. The objectives of this study were to review the literature on the current practices of chemoprophylaxis for leptospirosis and to explore, using a mathematical model, how various chemoprophylaxis scenarios may affect the progression of a leptospirosis outbreak...
June 3, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28583227/differential-diagnosis-and-proper-treatment-of-acute-rhinosinusitis-guidance-based-on-historical-data-analysis
#10
Gregor Cevc
BACKGROUND: The time course of rhinovirus positive and negative rhinosinusitis has not been quantified yet, which aggravates proper selection and justification of the optimum treatment for this illness. Such quantitative information would facilitate an early and proper identification of the disease and its differentiation from acute bacterial rhinosinusitis, and could diminish harmful overuse of antibiotics, arguably driven by patients' want for attention and the treating physicians' inability to offer an adequate verbal comfort in its stead...
June 1, 2017: Allergy & Rhinology
https://www.readbyqxmd.com/read/28562638/every-antibiotic-every-day-maximizing-the-impact-of-prospective-audit-and-feedback-on-total-antibiotic-use
#11
Tonya J Campbell, Melissa Decloe, Suzanne Gill, Grace Ho, Janine McCready, Jeff Powis
BACKGROUND: The success of antimicrobial stewardship is dependent on how often it is completed and which antimicrobials are targeted. We evaluated the impact of an antimicrobial stewardship program (ASP) in three non-ICU settings where all systemic antibiotics, regardless of spectrum, were targeted on the first weekday after initiation. METHODS: Prospective audit and feedback (PAAF) was initiated on the surgical, respiratory, and medical wards of a community hospital on July 1, 2010, October 1, 2010, and April 1, 2012, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28548647/acute-endophthalmitis-after-cataract-surgery-164-consecutive-cases-treated-at-a-referral-center-in-south-korea
#12
S H Jeong, H J Cho, H S Kim, J I Han, D W Lee, C G Kim, J W Kim
PurposeTo identify prognostic factors in patients referred with endophthalmitis after cataract surgery, and to evaluate the efficacy of primary vitrectomy as an initial management.MethodsOver an eight-year study period, we retrospectively reviewed the medical records of 164 patients who were referred with endophthalmitis following cataract surgery. Treatment generally conformed to standard guidelines, although primary vitrectomy was performed in several eyes with a visual acuity of hand motion or better, depending on the patient's status...
May 26, 2017: Eye
https://www.readbyqxmd.com/read/28544102/a-multicenter-retrospective-case-cohort-study-of-the-epidemiology-and-risk-factors-for-clostridium-difficile-infection-among-cord-blood-transplant-recipients
#13
Carolyn D Alonso, David A Braun, Ishan Patel, Mona Akbari, Daniel Jungmyung Oh, Tomi Jun, Malgorzata McMasters, Sarah P Hammond, Brett Glotzbecker, Corey Cutler, Daniel Leffler, Karen K Ballen, Ciarán P Kelly
BACKGROUND: Clostridium difficile infection (CDI) is the leading cause of health-care associated infectious diarrhea. The aim of this study was to evaluate the epidemiology and risk factors for CDI in the 100 days following umbilical cord blood transplantation (UCBT) at three Boston hospitals. METHODS: We performed a multicenter, retrospective, case-cohort study of 226 UCBT recipients at Beth Israel Deaconess Medical Center, Massachusetts General Hospital, and Dana Farber/Brigham and Women's Cancer Center from 2003-2012...
May 24, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28538018/low-serum-angiopoietin-1-high-serum-angiopoietin-2-and-high-ang-2-ang-1-protein-ratio-are-associated-with-early-onset-sepsis-in-surinamese-newborns
#14
Rens Zonneveld, Rianne Jongman, Amadu Juliana, Wilco Zijlmans, Frans Plötz, Grietje Molema, Matijs van Meurs
PURPOSE: Vascular inflammation and leakage in sepsis is mediated by Angiopoietin-1 (Ang-1) and -2 (Ang-2) and their phosphorylation of the endothelial Tie-2 receptor. Levels of Ang-2 change in adults and children during sepsis, which is associated with severity of sepsis. This study investigates levels of Ang-1 and Ang-2 in newborns to gain insight in the vascular pathophysiology of early onset sepsis (EOS) within 72 hours after birth. METHODS: A prospective cohort study was performed amongst 71 Surinamese newborns treated with antibiotics for suspected EOS and 20 control newborns...
May 22, 2017: Shock
https://www.readbyqxmd.com/read/28536862/mechanisms-of-hepatotoxicity-associated-with-the-monocyclic-%C3%AE-lactam-antibiotic-bal30072
#15
Franziska Paech, Simon Messner, Jochen Spickermann, Mathias Wind, Anne-Hortense Schmitt-Hoffmann, Anne Therese Witschi, Brett A Howell, Rachel J Church, Jeff Woodhead, Marc Engelhardt, Stephan Krähenbühl, Martina Maurer
BAL30072 is a new monocyclic β-lactam antibiotic under development which provides a therapeutic option for the treatment of severe infections caused by multi-drug-resistant Gram-negative bacteria. Despite the absence of liver toxicity in preclinical studies in rats and marmosets and in single dose clinical studies in humans, increased transaminase activities were observed in healthy subjects in multiple-dose clinical studies. We, therefore, initiated a comprehensive program to find out the mechanisms leading to hepatocellular injury using HepG2 cells (human hepatocellular carcinoma cell line), HepaRG cells (inducible hepatocytes derived from a human hepatic progenitor cell line), and human liver microtissue preparations...
May 23, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28516003/mode-of-action-of-the-2-phenylquinoline-efflux-inhibitor-pqq4r-against-escherichia-coli
#16
Diana Machado, Laura Fernandes, Sofia S Costa, Rolando Cannalire, Giuseppe Manfroni, Oriana Tabarrini, Isabel Couto, Stefano Sabatini, Miguel Viveiros
Efflux pump inhibitors are of great interest since their use as adjuvants of bacterial chemotherapy can increase the intracellular concentrations of the antibiotics and assist in the battle against the rising of antibiotic-resistant bacteria. In this work, we have described the mode of action of the 2-phenylquinoline efflux inhibitor (4-(2-(piperazin-1-yl)ethoxy)-2-(4-propoxyphenyl) quinolone - PQQ4R), against Escherichia coli, by studding its efflux inhibitory ability, its synergistic activity in combination with antibiotics, and compared its effects with the inhibitors phenyl-arginine-β-naphthylamide (PAβN) and chlorpromazine (CPZ)...
2017: PeerJ
https://www.readbyqxmd.com/read/28515630/an-exception-to-the-rule-no-association-between-antibiotic-resistance-and-decreased-disinfectant-microbicidal-efficacy-orthophthalaldehyde-opa-and-pseudomonas-aeruginosa-isolated-from-icu-and-paraplegic-patients
#17
REVIEW
R Herruzo, M J Vizcaíno, I Herruzo
BACKGROUND: Antibiotic resistance and decreased susceptibility to disinfectants are not usually associated in microorganisms, but we have found an exception to this rule: P. aeruginosa versus orthophthalaldehyde (OPA). METHODS: Bactericidal effect of OPA was measured at 10 minutes on endodoncy files contaminated with an ATCC strain (control) or 206 strains of P. aeruginosa recently isolated from 206 ICU and paraplegic patients in a tertiary university hospital, in two consecutive years...
March 2017: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28513809/oral-gentamicin-therapy-for-carbapenem-resistant-klebsiella-pneumoniae-gut-colonization-in-hematologic-patients-a-single-center-experience
#18
Paola Lambelet, Carlo Tascini, Simona Fortunato, Alessandro Stefanelli, Federico Simonetti, Chiara Vettori, Alessandro Leonildi, Francesco Menichetti
The mortality for carbapenem-resistant Klebsiella pneumoniae (KPC-Kp) infection ranges from 18 to 48% depending on the type of therapy. Mortality rates in hematologic patients are even higher, up to 85%. Gut decontamination with oral gentamicin might be an option to avoid a subsequent KPC-Kp infection in colonized patients. We treated 14 hematologic patients with oral gentamicin, 80 mg four times daily, for 7 to 25 days in order to eradicate KPC-Kp from the gut, starting oral gentamicin therapy when possible after the discontinuation of systemic antibiotic therapy...
May 17, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28507783/periprosthetic-shoulder-infection-an-overview
#19
REVIEW
Nicolas Bonnevialle, Florence Dauzères, Julien Toulemonde, Fanny Elia, Jean-Michel Laffosse, Pierre Mansat
Periprosthetic shoulder infection (PSI) is rare but potentially devastating. The rate of PSI is increased in cases of revision procedures, reverse shoulder implants and co-morbidities. One specific type of PSI is the occurrence of low-grade infections caused by non-suppurative bacteria such as Propionibacterium acnes or Staphylococcus epidemermidis.Success of treatment depends on micro-organism identification, appropriate surgical procedures and antibiotic administration efficiency. Post-operative early PSI can be treated with simple debridement, while chronic PSI requires a one- or two-stage revision procedure...
April 2017: EFORT Open Rev
https://www.readbyqxmd.com/read/28502892/biomarkers-kinetics-in-the-assessment-of-ventilator-associated-pneumonia-response-to-antibiotics-results-from-the-biovap-study
#20
Pedro Póvoa, Ignacio Martin-Loeches, Paula Ramirez, Lieuwe D Bos, Mariano Esperatti, Joana Silvestre, Gisela Gili, Gemma Goma, Eugenio Berlanga, Mateu Espasa, Elsa Gonçalves, Antoni Torres, Antonio Artigas
PURPOSE: Our aim was to evaluate the role of biomarker kinetics in the assessment of ventilator-associated pneumonia (VAP) response to antibiotics. MATERIALS AND METHODS: We performed a prospective, multicenter, observational study to evaluate in 37 microbiologically documented VAP, the kinetics of C-reactive protein (CRP), procalcitonin (PCT), mid-region fragment of pro-adrenomedullin (MR-proADM). The kinetics of each variable, from day 1 to 6 of therapy, was assessed with a time dependent analysis comparing survivors and non-survivors...
May 8, 2017: Journal of Critical Care
keyword
keyword
79534
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"