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antibiotic combination

Matthew D Howard, John C Su, Alvin H Chong
The number of solid organ transplants has been increasing annually worldwide. Advances in transplantation surgery and community awareness of organ donation have been key contributors. Combined with increased understanding of immunosuppression, there are a growing number of solid organ transplant recipients in the community as a result of improved long-term outcomes. There remains a high incidence of deaths worldwide post-transplant due to non-melanoma skin cancer (NMSC), which has greater morbidity and mortality in this population than in the general community...
April 24, 2018: American Journal of Clinical Dermatology
Lisa M Schechter, David P Creely, Cherilyn D Garner, Dee Shortridge, Hoan Nguyen, Lei Chen, Blake M Hanson, Erica Sodergren, George M Weinstock, W Michael Dunne, Alex van Belkum, Shana R Leopold
Although the TEM-1 β-lactamase (BlaTEM-1 ) hydrolyzes penicillins and narrow-spectrum cephalosporins, organisms expressing this enzyme are typically susceptible to β-lactam/β-lactamase inhibitor combinations such as piperacillin-tazobactam (TZP). However, our previous work led to the discovery of 28 clinical isolates of Escherichia coli resistant to TZP that contained only bla TEM-1 One of these isolates, E. coli 907355, was investigated further in this study. E. coli 907355 exhibited significantly higher β-lactamase activity and BlaTEM-1 protein levels when grown in the presence of subinhibitory concentrations of TZP...
April 24, 2018: MBio
G M Al-Taani, M Scott, D Farren, F Gilmore, B Mccullagh, C Hibberd, A Mccorry, A Versporten, H Goossens, P Zarb, M A Aldeyab
Antimicrobial resistance is a limiting factor for the success of the treatment of infectious diseases and is associated with increased morbidity and cost. The present study aims to evaluate prescribing patterns of antimicrobials and quantify progress in relation to targets for quality improvement in the prescription of antimicrobials in Northern Ireland's secondary care sector using three repetitive point prevalence surveys (PPS) over a 6-year period: the European Surveillance of Antimicrobial Consumption (ESAC-PPS) in 2009 and 2011 and the Global-PPS on Antimicrobial Consumption and Resistance in 2015...
April 25, 2018: Epidemiology and Infection
Giulia Fiorini, Angelo Zullo, Ilaria Maria Saracino, Matteo Pavoni, Dino Vaira
PURPOSE: Bacterial resistance toward the most used antibiotics is increasing in Helicobacter pylori strains worldwide. Emergence of multidrug resistance significantly affects the efficacy of standard therapy regimens. Therefore, monitoring for primary antimicrobial resistance is essential for H. pylori management in clinical practice. METHODOLOGY: H. pylori isolates obtained from patients consecutively observed in a single center were tested for primary resistance by using E-test method...
April 24, 2018: Scandinavian Journal of Gastroenterology
Franka Lestin-Bernstein, Marc Tietke, Lutz Briedigkeit, Oliver Heese
PURPOSE: Spondylodiscitis as a rare disease has increased in recent years; there are only a few recommendations regarding the diagnostics and treatment. The objective of this retrospective study was to characterise these patients and identify factors for a favourable healing process - with an emphasis on antibiotic therapy. METHODOLOGY: Findings/treatment regimens for all patients with spondylodiscitis treated at a tertiary care hospital in 2012/2013 were recorded...
April 23, 2018: Journal of Medical Microbiology
Omar Abdulfattah, Ebad Ur Rahman, Bikash Bhattarai, Sumit Dahal, Zainab Alnafoosi, David Trauber, Danilo Enriquez, Frances Schmidt
Objectives : Lymphoplasmacytic lymphoma (LPL) is a mature B cell lymphoma that usually involves the bone marrow, spleen and lymph nodes. Extramedullary involvement, including the lung, is rarely reported. Case description : A 73-year-old female initially presented to our hospital complaining of productive cough of white-colour sputum for three weeks duration. She reported unintentional weight loss of ten pounds over the last five months. There was no history of haemoptysis, fever, night sweats, chills, recent infections or hospitalization...
2018: Journal of Community Hospital Internal Medicine Perspectives
Ashok J Tamhankar, Shreyasee S Karnik, Cecilia Stålsby Lundborg
Antibiotic resistance, a consequence of antibiotic use, is a threat to health, with severe consequences for resource constrained settings. If determinants for human antibiotic use in India, a lower middle income country, with one of the highest antibiotic consumption in the world could be understood, interventions could be developed, having implications for similar settings. Year wise data for India, for potential determinants and antibiotic consumption, was sourced from publicly available databases for the years 2000-2010...
April 23, 2018: Scientific Reports
Erik Wistrand-Yuen, Michael Knopp, Karin Hjort, Sanna Koskiniemi, Otto G Berg, Dan I Andersson
It has become increasingly clear that low levels of antibiotics present in many environments can select for resistant bacteria, yet the evolutionary pathways for resistance development during exposure to low amounts of antibiotics remain poorly defined. Here we show that Salmonella enterica exposed to sub-MIC levels of streptomycin evolved high-level resistance via novel mechanisms that are different from those observed during lethal selections. During lethal selection only rpsL mutations are found, whereas at sub-MIC selection resistance is generated by several small-effect resistance mutations that combined confer high-level resistance via three different mechanisms: (i) alteration of the ribosomal RNA target (gidB mutations), (ii) reduction in aminoglycoside uptake (cyoB, nuoG, and trkH mutations), and (iii) induction of the aminoglycoside-modifying enzyme AadA (znuA mutations)...
April 23, 2018: Nature Communications
H Mehta, J Weng, A Prater, R A L Elworth, X Han, Y Shamoo
Nocardia spp. are Gram positive opportunistic pathogens that affect largely immunocompromised patients leading to serious pulmonary or systemic infections. Combination therapy using the folate biosynthesis pathway inhibitors, trimethoprim and sulfamethoxazole (TMP-SMX) is commonly used as an antimicrobial therapy. Not surprisingly, as antibiotic therapies for nocardiosis can extend for many months, resistance to TMP-SMX has emerged. Using experimental evolution, we surveyed the genetic basis of adaptation to TMP-SMX across 8 strains of Nocardia nova and 2 strains of Nocardia cyriacigeorgica Employing both continuous experimental evolution to provide longitudinal information on the order of changes and characterization of resistant end-point isolates, we observe changes that are consistent with modification of two enzymes of the folate biosynthesis pathway: dihydrofolate reductase (DHFR) and dihydropteroate synthase (DHPS/FolP) with the mutations often clustered near the active site of the enzymes...
April 23, 2018: Antimicrobial Agents and Chemotherapy
Niv Zmora, Sudeep Shrestha, Ami Neuberger, Yael Paran, Rajendra Tamrakar, Ashish Shrestha, Surendra K Madhup, T R S Bedi, Rajendra Koju, Eli Schwartz
BACKGROUND: Emerging resistance to antibiotics renders therapy of Typhoid Fever (TF) increasingly challenging. The current single-drug regimens exhibit prolonged fever clearance time (FCT), imposing a great burden on both patients and health systems, and potentially contributing to the development of antibiotic resistance and the chronic carriage of the pathogens. The aim of our study was to assess the efficacy of combining third-generation cephalosporin therapy with azithromycin on the outcomes of TF in patients living in an endemic region...
April 2018: PLoS Neglected Tropical Diseases
Ravichandra Vemuri, Rohit Gundamaraju, Madhur D Shastri, Shakti Dhar Shukla, Krishnakumar Kalpurath, Madeleine Ball, Stephen Tristram, Esaki M Shankar, Kiran Ahuja, Rajaraman Eri
Gut microbiota is established during birth and evolves with age, mostly maintaining the commensal relationship with the host. A growing body of clinical evidence suggests an intricate relationship between the gut microbiota and the immune system. With ageing, the gut microbiota develops significant imbalances in the major phyla such as the anaerobic Firmicutes and Bacteroidetes as well as a diverse range of facultative organisms, resulting in impaired immune responses. Antimicrobial therapy is commonly used for the treatment of infections; however, this may also result in the loss of normal gut flora...
2018: BioMed Research International
Uma Chaudhary, Shipra Agarwal, Kausalya Raghuraman
Introduction: Identification of Extended spectrum beta lactamases (ESBL), AmpC production and carbapenemase production among isolates of Escherichia coli , helps clinician to rationalize the choice of antibiotics. However, there is a lack of simple and effective method for simultaneous identification of these beta lactamases. Aim: To determine the concurrent production of beta lactamases using twelve disc method on E. coli isolates. Materials and Methods: A total of 200 multidrug resistant E...
April 2018: Avicenna Journal of Medicine
Fabian Cieplik, Viktoria-Sophia Steinwachs, Denise Muehler, Karl-Anton Hiller, Thomas Thurnheer, Georgios N Belibasakis, Wolfgang Buchalla, Tim Maisch
In light of increasing resistance toward conventional antibiotics and antiseptics, antimicrobial photodynamic therapy (aPDT) may be a valuable alternative, especially for use in dentistry. In this regard, photosensitizers (PS) based on a phenalen-1-one structure seem to be especially favorable due to their high singlet oxygen quantum yield. However, the actual target structures of phenalen-1-one-mediated aPDT are still unclear. The aim of the present study was to investigate the antimicrobial efficacy of aPDT mediated by phenalen-1-one derivatives SAPYR and SAGUA for inactivation of a polymicrobial biofilm consisting of three putative periodontal pathogens in vitro and to get first insights in the mechanism of action of phenalen-1-one-mediated aPDT by assessing damage of cytoplasmic membranes...
2018: Frontiers in Microbiology
Christopher J Hostler, Rebekah W Moehring, Elizabeth S Dodds Ashley, Melissa Johnson, Angelina Davis, Sarah S Lewis, Daniel J Sexton, Deverick J Anderson
OBJECTIVETo determine the feasibility and value of developing a regional antibiogram for community hospitals.DESIGNMulticenter retrospective analysis of antibiograms.SETTING AND PARTICIPANTSA total of 20 community hospitals in central and eastern North Carolina and south central Virginia participated in this study.METHODSWe combined antibiogram data from participating hospitals for 13 clinically relevant gram-negative pathogen-antibiotic combinations. From this combined antibiogram, we developed a regional antibiogram based on the mean susceptibilities of the combined data...
April 23, 2018: Infection Control and Hospital Epidemiology
Yuequn Tao, Jun Cai, Xiulan Huai, Bin Liu
Antibiotics degradation remains a longstanding challenge in wastewater treatment. Towards this objective, we have developed a novel technique combining cavitating jets impingement with multiple synergetic methods, i.e., UV/Fenton, analogous Fenton, and photocatalytic oxidation in the present work. Three kinds of antibiotics namely amoxicillin, doxycycline and sulfadiazine sodium, are selected as model pollutants. Individual application of cavitating jets impingement is firstly conducted to evaluate the effects of jets impinging forms and nozzle inlet pressure...
June 2018: Ultrasonics Sonochemistry
Kanika Thakur, Gajanand Sharma, Bhupinder Singh, Sanjay Chhibber, A B Patil, Om Prakash Katare
The current research study intends to explore the combined potential of lipid nanoparticles and chitosan as an optimum therapy for the management of wound infections. Fusidic acid (FA), a steroidal antibiotic employed for treatment of primary and secondary topical infections was encapsulated within the nanoengineered lipid-polymer hybrid nanoparticles (FA-LPHNs). A number of variables like lipid/polymer ratio, lipid, surfactant and chitosan concentration, stirring speed were optimized to get the desired particle size and % entrapment efficiency...
April 19, 2018: International Journal of Biological Macromolecules
Wei Du, Min Sun, Pengqi Guo, Chun Chang, Qiang Fu
Nowadays, the abuse of antibiotics in aquaculture has generated considerable problems for food safety. Therefore, it is imperative to develop a simple and selective method for monitoring illegal use of antibiotics in aquatic products. In this study, a method combined molecularly imprinted membranes (MIMs) extraction and liquid chromatography was developed for the selective analysis of cloxacillin from shrimp samples. The MIMs was synthesized by UV photopolymerization, and characterized by scanning electron microscope, Fourier transform infrared spectra, thermo-gravimetric analysis and swelling test...
September 1, 2018: Food Chemistry
Maya Korem, Nahum S Goldberg, Amos Cahan, Matan J Cohen, Isaac Nissenbaum, Allon E Moses
Irreversible electroporation (IRE) damages cell membranes and is used in medicine for non-thermal ablation of malignant tumors. Our aim was to evaluate the antimicrobial effect of IRE. The pathogenic microorganisms, S. aureus, S. pyogenes, E. coli, P. aeruginosa and C. albicans were subjected to IRE. Survival was measured as a function of voltage and the number of pulses applied. Combined use of IRE and oxacillin for eradication of S. aureus was also tested. Log10 reduction of microorganisms positively correlated with the number of applied pulses...
April 21, 2018: Letters in Applied Microbiology
David Vyles, Asriani Chiu, John Routes, Mariana Castells, Elizabeth J Phillips, Jennifer Kibicho, David C Brousseau
BACKGROUND: Penicillin allergy is commonly reported in the pediatric emergency department. We previously performed 3-tier penicillin allergy testing on children with low-risk symptoms, and 100% tolerated a penicillin challenge without an allergic reaction. We hypothesized that no serious allergic reactions would occur after re-exposure to penicillin and that prescription practices would change after testing. METHODS: We performed a follow-up case series of 100 children whose test results were negative for penicillin allergy...
April 20, 2018: Pediatrics
Marion Taleb, Nicolas Nardi, Alexis Arnaud, Nathalie Costet, Pierre-Yves Donnio, Charlotte Engrand, Edouard Habonimana, Eric Wodey, Pierre Tattevin
Acute appendicitis in children requires early surgery, and a short course of antibiotics active on Enterobacteriaceae and anaerobes. Although aminoglycoside-containing 3-drug regimen have been used successfully for decades, simpler regimens with similar efficacy are increasingly used. We aimed to evaluate the impact of a switch from the combination of cefotaxime, metronidazole, and gentamicin (regimen 1), to piperacillin-tazobactam (regimen 2), as first-line regimen for complicated acute appendicitis in children...
April 17, 2018: International Journal of Antimicrobial Agents
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