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https://www.readbyqxmd.com/read/28922066/the-effect-of-lysozyme-on-reducing-biofilms-by-staphylococcus-aureus-pseudomonas-aeruginosa-and-gardnerella-vaginalis-an-in-vitro-examination
#1
Mirsada Hukić, Dzenita Seljmo, Amra Ramovic, Monia Avdić Ibrišimović, Serkan Dogan, Jasna Hukic, Elma Feric Bojic
Two basic questions about lysozyme activities on the selected microorganisms were investigated, namely whether lysozyme inhibits biofilm production and which concentrations of the enzyme have the ability to change the natural biofilm producing capacity of different strains of Staphylococcus aureus (methicillin sensitive and resistant), Streptococcus pyogenes, Pseudomonas aeruginosa, and Gardnerella vaginalis. The effect of lysozyme on biofilm formation capacities of 16 strains of selected microorganisms was investigated, whereby four testing replicates have been performed in vitro using the Test Tube method, and the potential of lysozyme to change biofilm forming capacities depending on its concentration, species, and strains of microorganisms is demonstrated...
September 18, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28918646/depletion-of-gut-resident-ccr5-cells-for-hiv-cure-strategies
#2
David Patrick Merriam, Connie Chen, Gema Mendez-Lagares, Kenneth Rogers, Anthony Michaels, Jiangli Yan, Paul Casaz, Keith Reimann, Francois Villenger, Dennis J Hartigan-O'Connor
The HIV reservoir forming at the earliest stages of infection is likely composed of CCR5+ cells, because these cells are the targets of transmissible virus. Restriction of the CCR5+ reservoir, particularly in gut, may be needed for subsequent cure attempts. Strategies for killing or depleting CCR5+ cells have been described, but none have been tested in vivo in non-human primates and the extent of achievable depletion from tissues is not known. Here we investigate the efficacy of two novel cytotoxic treatments for targeting and eliminating CCR5+ cells in young rhesus macaques...
September 17, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28917199/enhanced-phosphorus-and-ciprofloxacin-removal-in-a-modified-baf-system-by-configuring-fe-c-micro-electrolysis-investigation-on-pollutants-removal-and-degradation-mechanisms
#3
Longlong Zhang, Qinyan Yue, Kunlun Yang, Pin Zhao, Baoyu Gao
A modified biological aerated filter (BAF) system configured Fe-C micro electrolysis was applied to enhance phosphorus and ciprofloxacin (CIP) removal. A novel sludge ceramic and sintering ferric-carbon ceramic (SFC) were separately packed into a lab-scale BAF and Fe-C micro electrolysis reactor. The BAF and Fe-C micro electrolysis coupled system was operated about 230days. The enhancement of phosphorus and ciprofloxacin removals by Fe-C micro electrolysis, the degradation mechanisms of CIP and the variations of microbial population were investigated...
September 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28914348/immunogenicity-and-antimicrobial-effectiveness-of-pseudomonas-aeruginosa-specific-bacteriophage-in-a-human-lung-in-vitro-model
#4
Joseph R Shiley, Kristen K Comfort, Jayne B Robinson
The rise of antibiotic resistant bacteria is posing a serious threat to human health. For example, resistant strains of Pseudomonas aeruginosa have resulted in untreatable and potentially lethal infections in both cystic fibrosis and immunocompromised patients. Due to the growing need for alternative treatment options, bacteriophage, or phage, therapy is gaining considerable attention. While previous studies have demonstrated the effectiveness of phage in combating persistent bacterial infections, there is currently a lack of knowledge regarding the host immunological response following phage exposure...
September 15, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28906137/treatment-of-achromobacter-ventilator-associated-pneumonia-in-critically-ill-trauma-patients
#5
G Christopher Wood, Brittany L Jonap, George O Maish, Louis J Magnotti, Joseph M Swanson, Bradley A Boucher, Martin A Croce, Timothy C Fabian
BACKGROUND: Achromobacter sp are nonfermenting Gram-negative bacilli (NFGNB) that rarely cause severe infections, including ventilator-associated pneumonia (VAP). Data on the treatment of Achromobacter pneumonia are very limited, and the organism has been associated with a high mortality rate. Thus, more data are needed on treating this organism. OBJECTIVE: To evaluate the treatment of Achromobacter VAP in critically ill trauma patients. METHODS: This retrospective, observational study evaluated critically ill trauma patients who developed Achromobacter VAP...
September 1, 2017: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/28903765/antimicrobial-resistance-among-pathogenic-bacteria-from-mink-neovison-vison-in-denmark
#6
Nanett Kvist Nikolaisen, Desireé Corvera Kløve Lassen, Mariann Chriél, Gitte Larsen, Vibeke Frøkjær Jensen, Karl Pedersen
BACKGROUND: For proper treatment of bacterial infections in mink, knowledge of the causative agents and their antimicrobial susceptibility patterns is crucial. The used antimicrobials are in general not registered for mink, i.e. most usage is "off-label". In this study, we report the patterns of antimicrobial resistance among pathogenic bacteria isolated from Danish mink during the period 2014-2016. The aim of this investigation was to provide data on antimicrobial resistance and consumption, to serve as background knowledge for new veterinary guidelines for prudent and optimal antimicrobial usage in mink...
September 13, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28902888/dendrimer-based-selective-autophagy-induction-rescues-%C3%AE-f508-cftr-and-inhibits-pseudomonas-aeruginosa-infection-in-cystic-fibrosis
#7
Scott Mackenzie Brockman, Manish Bodas, David Silverberg, Ajit Sharma, Neeraj Vij
BACKGROUND: Cystic Fibrosis (CF) is a genetic disorder caused by mutation(s) in the CF-transmembrane conductance regulator (Cftr) gene. The most common mutation, ΔF508, leads to accumulation of defective-CFTR protein in aggresome-bodies. Additionally, Pseudomonas aeruginosa (Pa), a common CF pathogen, exacerbates obstructive CF lung pathology. In the present study, we aimed to develop and test a novel strategy to improve the bioavailability and potentially achieve targeted drug delivery of cysteamine, a potent autophagy-inducing drug with anti-bacterial properties, by developing a dendrimer (PAMAM-DEN)-based cysteamine analogue...
2017: PloS One
https://www.readbyqxmd.com/read/28902153/bacterial-biofilm-control-by-perturbation-of-bacterial-signaling-processes
#8
REVIEW
Tim Holm Jakobsen, Tim Tolker-Nielsen, Michael Givskov
The development of effective strategies to combat biofilm infections by means of either mechanical or chemical approaches could dramatically change today's treatment procedures for the benefit of thousands of patients. Remarkably, considering the increased focus on biofilms in general, there has still not been invented and/or developed any simple, efficient and reliable methods with which to "chemically" eradicate biofilm infections. This underlines the resilience of infective agents present as biofilms and it further emphasizes the insufficiency of today's approaches used to combat chronic infections...
September 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28902134/retention-of-antibacterial-activity-in-geranium-plasma-polymer-thin-films
#9
Ahmed Al-Jumaili, Kateryna Bazaka, Mohan V Jacob
Bacterial colonisation of biomedical devices demands novel antibacterial coatings. Plasma-enabled treatment is an established technique for selective modification of physicochemical characteristics of the surface and deposition of polymer thin films. We investigated the retention of inherent antibacterial activity in geranium based plasma polymer thin films. Attachment and biofilm formation by Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli was significantly reduced on the surfaces of samples fabricated at 10 W radio frequency (RF) power, compared to that of control or films fabricated at higher input power...
September 13, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28899963/s5h-dmr6-encodes-a-salicylic-acid-5-hydroxylase-that-fine-tunes-salicylic-acid-homeostasis
#10
Yanjun Zhang, Li Zhao, Jiangzhe Zhao, Yujia Li, Jinbin Wang, Rong Guo, Su-Sheng Gan, Chang-Jun Liu, Kewei Zhang
The phytohormone salicylic acid (SA) plays essential roles in biotic and abiotic responses, plant development, and leaf senescence. 2,5-Dihydroxybenzoic acid (2,5-DHBA or gentisic acid) is one of the most commonly occurring aromatic acids in green plants and is assumed to be generated from SA, but the enzymes involved in its production remain obscure. DMR6 (Downy Mildew Resistant 6, At5g24530) has been proven essential in plant immunity of Arabidopsis, but its biochemical properties are not well understood...
September 12, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28893690/new-agents-for-the-treatment-of-infections-with-gram-negative-bacteria-restoring-the-miracle-or-false-dawn
#11
REVIEW
Hugh Wright, Robert A Bonomo, David L Paterson
BACKGROUND: Antibiotic resistance in gram-negative resistance has developed without a commensurate response in the successful development of antibiotic agents, though recent progress has been made. AIMS: This review aims to provide a summary of the existing evidence on efficacy, spectrum of activity and the development of resistance of new agents that have been licensed or completed advanced clinical trials that possess activity against resistant gram-negative organisms...
September 8, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28893183/antimicrobial-resistance-in-africa-a-systematic-review
#12
Birkneh Tilahun Tadesse, Elizabeth A Ashley, Stefano Ongarello, Joshua Havumaki, Miranga Wijegoonewardena, Iveth J González, Sabine Dittrich
BACKGROUND: Antimicrobial resistance (AMR) is widely acknowledged as a global problem, yet in many parts of the world its magnitude is still not well understood. This review, using a public health focused approach, aimed to understand and describe the current status of AMR in Africa in relation to common causes of infections and drugs recommended in WHO treatment guidelines. METHODS: PubMed, EMBASE and other relevant databases were searched for recent articles (2013-2016) in accordance with the PRISMA guidelines...
September 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28892949/corneal-collagen-cross-linking-for-treatment-of-bacterial-and-herpetic-keratitis
#13
Mohammad Reza Khalili, Hamid Reza Jahadi, Mashaallah Karimi, Masoud Yasemi
INTRODUCTION: Optimal management of infective keratitis is a formidable challenge and subject of ongoing studies. Recently, Collagen Cross-Linking (CXL) of the cornea has been considered to be a new effective therapeutic approach for resistant infectious keratitis. AIM: Aim of the study was to evaluate the effectiveness of CXL with Ultraviolet-A (UV-A) and riboflavin for treatment of the refractory bacterial and Herpes Simplex Virus (HSV) keratitis. MATERIALS AND METHODS: In this prospective interventional study, eight patients with diagnosis of infectious keratitis who were referred to Khalili Hospital eye emergency room, between 2014 and 2015 were included in the study...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28891754/mounier-kuhn-syndrome-presenting-with-recurrent-atelectasis
#14
Christine Quentin, Nicolas Lefevre, Eddy Bodart, Laurence Hanssens
Objective and importance Mounier Kuhn syndrome is usually diagnosed in adulthood, and only a few cases have been described in childhood. Clinical presentation We present the case of a seven-year-old boy suffering from recurrent pneumonia and atelectasis. Intervention Previously performed chest X-rays showed bilateral hyperinflation and tracheobronchomegaly. Chest computed tomography (CT) confirmed the presence of distal enlargement of trachea and bronchi. Tracheobronchomegaly associated with recurrent respiratory tract infections is consistent with Mounier Kuhn syndrome...
September 11, 2017: Acta Clinica Belgica
https://www.readbyqxmd.com/read/28890220/production-of-highly-stable-spray-dried-phage-formulations-for-treatment-of-pseudomonas-aeruginosa-lung-infection
#15
Rachel Y Chang, Jennifer Wong, Ash Mathai, Sandra Morales, Elizabeth Kutter, Warwick Britton, Jian Li, Hak-Kim Chan
The potential of bacteriophage therapy for the treatment of pulmonary infections caused by antibiotic-resistant bacteria has been well recognised. The purpose of this study was to investigate the effect of excipients on stabilisation and aerosolisation of spray dried powders of morphologically different phages - PEV podovirus and PEV myovirus. Seven anti-pseudomonal phages were screened against 90 clinical strains of bacterial hosts and three of the phages were selected for formulation study based on the host range...
September 7, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28886559/sewage-treatment-effluents-in-delhi-a-key-contributor-of-%C3%AE-lactam-resistant-bacteria-and-genes-to-the-environment
#16
Manisha Lamba, Shaikh Ziauddin Ahammad
Rapid emergence of antibiotic resistance (AR) in developing countries is posing a greater health risk and increasing the global disease burden. Lack of access to safe drinking water, poor sanitation and inadequate sewage treatment facilities in these countries are fueling the problem associated with emergence of AR. Rapid proliferation of AR mediated by treated and untreated discharges from sewage treatment plants (STPs) is a prime public health concern. This study aims to understand the occurrence, fate, and routes of proliferation of carbapenem (KPC) and extended spectrum β-lactam (ESBL) resistant bacteria, and selected resistant genes in the samples collected from different unit operations in 12 STPs in New Delhi over two seasons...
August 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/28882007/epidemiology-of-antibiotic-resistance-in-pseudomonas-aeruginosa-implications-for-empiric-and-definitive-therapy
#17
REVIEW
P Ruiz-Garbajosa, R Cantón
Pseudomonas aeruginosa is one of the major pathogens causing hospital-acquired infections. It can easily develop antibiotic resistance through chromosomal mutations or by horizontal acquisition of resistant determinants. The increasing prevalence of multi-drug-resistant (MDR) or extensively-drug-resistant (XDR) P. aeruginosa isolates is associated with the dissemination of the so-called high-risk-clones, such as ST175. Infections caused by MDR/XDR are a cause of concern as they compromise the selection of appropriate empiric and definitive antimicrobial treatments...
September 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28881886/monitoring-sputum-culture-in-resected-esophageal-cancer-patients-with-preoperative-treatment
#18
K Kosumi, Y Baba, K Yamashita, T Ishimoto, K Nakamura, M Ohuchi, Y Kiyozumi, D Izumi, R Tokunaga, K Harada, H Shigaki, J Kurashige, M Iwatsuki, Y Sakamoto, N Yoshida, M Watanabe, H Baba
Pneumonia is a major cause of postesophagectomy mortality and worsens the long-term survival in resected esophageal cancer patients. Moreover, preoperative treatments such as chemotherapy or chemoradiotherapy (which have recently been applied worldwide) might affect the bacterial flora of the sputum. To investigate the association among preoperative treatments, the bacterial flora of sputum, and the clinical and pathological features in resected esophageal cancer patients, this study newly investigates the effect of preoperative treatments on the bacterial flora of sputum...
December 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28881420/lethal-effect-of-photodynamic-treatment-on-persister-bacteria
#19
Oscar Juan Oppezzo, Ana Florencia Forte Giacobone
Persister bacteria tolerate bactericidal antibiotics due to transient and reversible phenotypic changes. Since these bacteria can limit the effectiveness of antibiotics to eradicate certain infections, their elimination is a relevant issue. Photodynamic therapy seems suitable for this purpose, but phenotypic tolerance to it has also been reported for Pseudomonas aeruginosa. To test whether any phenotypic feature could confer tolerance against both antibiotics and photoinactivation, survivors from exposures to light in the presence of methylene blue were treated with ofloxacin, an antibiotic effective on non-growing bacteria...
September 7, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28879065/pharmacologic-inhibition-of-mek1-2-reduces-lung-inflammation-without-impairing-bacterial-clearance-in-experimental-pseudomonas-aeruginosa-pneumonia
#20
Matthew E Long, Ke-Qin Gong, William E Eddy, W Conrad Liles, Anne M Manicone
This study was designed to test the therapeutic potential of a MEK1/2 inhibitor (MEKi) in an experimental model of Pseudomonas aeruginosa pneumonia. The study found that treatment with MEKi reduced alveolar neutrophilic inflammation and led to faster recovery of weight compared to carrier-treated mice, without impairing bacterial clearance. Alveolar macrophages isolated from MEKi-treated mice also had increased M2 gene and protein expression, supporting the concept that MEKi modulates in vivo macrophage inflammatory responses...
2017: Pneumonia
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