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https://www.readbyqxmd.com/read/28918351/susceptibility-profiles-of-bacteria-causing-urinary-tract-infection-in-southern-tunisia
#1
Sonda Guermazi-Toumi, Sirine Boujlel, Mouna Assoudi, Riadh Issaoui, Sonia Tlili, Mohamed Ennaceur Hlaiem
OBJECTIVES: The aim of this study was to determine the epidemiological profile and the antibiotic resistance of bacteria responsible for urinary infections diagnosed in the department of microbiology of the regional hospital Houcine Bouzaiene (Gafsa) in the south west of Tunisia. METHODS: All the cytobacteriological urine samples analyzed from 1 January 2015 to 30 June 2016 were included in the study. The adopted criteria to define urinary infection were: leukocyturia >10(4)/ml and bacteriuria >10(5)CFU/ml...
September 13, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28917650/dodecyl-sorbitan-ethers-as-antimicrobials-against-gram-positive-bacteria
#2
Dorine Belmessieri, Charlotte Gozlan, Marie-Christine Duclos, Oana Dumitrescu, Gérard Lina, Andreas Redl, Nicolas Duguet, Marc Lemaire
A range of amphiphilic sorbitan ethers has been synthesized in two steps from sorbitan following an acetalization/hydrogenolysis sequence. These sorbitan ethers and the acetal intermediates have been evaluated as antimicrobials against Gram-negative and Gram-positive bacteria. No antimicrobial activity was observed for Gram-negative bacteria. However, the compounds bearing a linear dodecyl chain exhibit antimicrobial activity (MIC as low as 8μg/mL) against Gram-positive bacteria such as Listeria monocytogenes, Enterococcus faecalis and Staphylococcus aureus...
September 7, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28916315/the-effect-of-immune-modulation-of-streptococcus-constellatus-sc10-strain-upon-acinetobactor-baumannii-infection
#3
Abdullah A Alyousef, Israa M S Al-Kadmy
Acinetobacter baumannii is a tiny, plump and rod-shaped Gram-negative coccobacillus, notorious as an opportunistic pathogen, which is now being considered by CDC as a serious public health threat. Preventing colonization may be a better therapeutic choice using microbiota to protect against A. baumannii transmission. Human microbiota not only regulates immune homeostasis as well provides essential health benefits therefore discovering the interface due microbiota in host immune system will allow to recognise novel immuno- or microbe-based therapies...
September 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28915359/presence-of-%C3%AE-lactamase-encoding-genes-in-burkholderia-cepacia-complex-isolated-from-soil
#4
João Pedro Rueda Furlan, Danilo Garcia Sanchez, Ana Lúcia Fachin, Eliana Guedes Stehling
Burkholderia cepacia complex has emerged as an important opportunistic bacteria group for immunocompromised patients, and it has a high level of intrinsic resistance for different antibiotic classes. Hydrolysis of β-lactam antibiotics by β-lactamases is the most common resistance mechanism in Gram-negative bacteria, and the presence of such enzymes complicates the selection of appropriate therapy. This study aimed at investigating the antimicrobial resistance profile and the presence of β-lactamase encoding genes in B...
September 15, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28914802/phylogenetic-analysis-and-antimicrobial-profiles-of-cultured-emerging-opportunistic-pathogens-phyla-actinobacteria-and-proteobacteria-identified-in-hot-springs
#5
Jocelyn Leonie Jardine, Akebe Luther King Abia, Vuyo Mavumengwana, Eunice Ubomba-Jaswa
Hot spring water may harbour emerging waterborne opportunistic pathogens that can cause infections in humans. We have investigated the diversity and antimicrobial resistance of culturable emerging and opportunistic bacterial pathogens, in water and sediment of hot springs located in Limpopo, South Africa. Aerobic bacteria were cultured and identified using 16S ribosomal DNA (rDNA) gene sequencing. The presence of Legionella spp. was investigated using real-time polymerase chain reaction. Isolates were tested for resistance to ten antibiotics representing six different classes: β-lactam (carbenicillin), aminoglycosides (gentamycin, kanamycin, streptomycin), tetracycline, amphenicols (chloramphenicol, ceftriaxone), sulphonamides (co-trimoxazole) and quinolones (nalidixic acid, norfloxacin)...
September 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28914466/supramolecular-hydro-and-ionogels-a-study-of-their-properties-and-antibacterial-activity
#6
Carla Rizzo, Rossella Arrigo, Nadka Tz Dintcheva, Giuseppe Gallo, Francesco Giannici, Renato Noto, Alberto Sutera, Paola Vitale, Francesca D'Anna
Diimidazolium-based organic salts, bearing peptides or aminoacids as anions, have been synthesized and tested for their gelling ability in biocompatible solvents. These low molecular weight salts were successfully used as gelators in phosphate saline buffer and ionic liquids. Then, properties of obtained soft materials were analyzed in terms of melting temperature and gel strength as accounted for by rheological investigation. Gel phase formation was studied using UV-vis and resonance light scattering measurements, whereas morphology of soft materials was analysed using polarized optical microscopy and scanning electron microscopy...
September 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28912103/membrane-perturbing-activities-and-structural-properties-of-the-frog-skin-derived-peptide-esculentin-1a-1-21-nh2-and-its-diastereomer-esc-1-21-1c-correlation-with-their-antipseudomonal-and-cytotoxic-activity
#7
Maria Rosa Loffredo, Anirban Ghosh, Nicole Harmouche, Bruno Casciaro, Vincenzo Luca, Annalisa Bortolotti, Floriana Cappiello, Lorenzo Stella, Anirban Bhunia, Burkhard Bechinger, Maria Luisa Mangoni
Antimicrobial peptides (AMPs) represent new alternatives to cope with the increasing number of multi-drug resistant microbial infections. Recently, a derivative of the frog-skin AMP esculentin-1a, Esc(1-21), was found to rapidly kill both the planktonic and biofilm forms of the Gram-negative bacterium Pseudomonas aeruginosa with a membrane-perturbing activity as a plausible mode of action. Lately, its diastereomer Esc(1-21)-1c containing two d-amino acids i.e. (D)Leu14 and (D)Ser17 revealed to be less cytotoxic, more stable to proteolytic degradation and more efficient in eradicating Pseudomonas biofilm...
September 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28911188/diversity-of-ochrobactrum-species-in-food-animals-antibiotic-resistance-phenotypes-and-polymorphisms-in-the-blaoch-gene
#8
Carla Andrea Alonso, Yakubu A Kwabugge, Madubuike U Anyanwu, Carmen Torres, Kennedy F Chah
Twenty-six lactose non-fermenting, oxidase, urease and citrate-positive Gram-negative rods, isolated from broiler chickens, pigs and cattle at slaughter, were subjected to the matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry and 16S rDNA sequencing for identification. Susceptibility to 14 antimicrobials was determined by the disc diffusion method. Ochrobactrum isolates resistant to third-generation cephalosporins were PCR-screened for the presence of the Ochrobactrum anthropi ampC gene (blaOCH)...
September 15, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28910076/gold-decorated-porous-silicon-nanopillars-for-targeted-hyperthermal-treatment-of-bacterial-infections
#9
Hashim Alhmoud, Anna Cifuentes-Rius, Bahman Delalat, David G Lancaster, Nicolas H Voelcker
In order to address the issue of pathogenic bacterial colonization of diabetic wounds, a more direct and robust approach is required, which relies on a physical form of bacterial destruction in addition to the conventional biochemical approach (i.e. antibiotics). Targeted bacterial destruction through the use of photothermally active nanomaterials has recently come into the spotlight as a viable approach to solving the rising problem of antibiotic resistant microorganisms. Materials with high absorption coefficients in the near infrared (NIR) region of the electromagnetic spectrum show promise as alternative antibacterial therapeutic agents, since they preclude the development of bacterial resistance and can be activated on demand...
September 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28906365/the-antibiotic-susceptibility-patterns-of-uropathogens-among-children-with-urinary-tract-infection-in-shiraz
#10
Gholamreza Pouladfar, Mitra Basiratnia, Mojtaba Anvarinejad, Pejman Abbasi, Fatemeh Amirmoezi, Samaneh Zare
Urinary tract infection (UTI) is one of the most common bacterial infections in pediatrics. Delay in diagnosis and treatment can cause significant morbidity. The physicians knowledge regarding the symptoms, microorganisms that caused UTI, and effective antibiotics in a geographical area can help them to select the appropriate antibiotics. This study was performed to determine the prevalence of bacteria that cause UTI and their susceptibility to common antibiotics as well as the common symptoms and associated factors in children of Shiraz, Southern Iran...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28905331/antibiotic-distribution-into-cerebrospinal-fluid-can-dosing-safely-account-for-drug-and-disease-factors-in-the-treatment-of-ventriculostomy-associated-infections
#11
Nilesh Kumta, Jason A Roberts, Jeffrey Lipman, Menino Osbert Cotta
Ventriculostomy-associated infections, or ventriculitis, in critically ill patients are associated with considerable morbidity. Efficacious antibiotic dosing for the treatment of these infections may be complicated by altered antibiotic concentrations in the cerebrospinal fluid due to variable meningeal inflammation and antibiotic properties. Therefore, doses used to treat infections with a higher degree of meningeal inflammation (such as meningitis) may often fail to achieve equivalent exposures in patients with ventriculostomy-associated infections such as ventriculitis...
September 13, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28904944/antibacterial-and-antibiotic-modifying-activity-of-methanol-extracts-from-six-cameroonian-food-plants-against-multidrug-resistant-enteric-bacteria
#12
Joachim K Dzotam, Victor Kuete
The present work was designed to investigate the antibacterial activities of methanol extracts from six Cameroonian edible plants and their synergistic effects with some commonly used antibiotics against multidrug-resistant (MDR) Gram-negative bacteria expressing active efflux pumps. The extracts were subjected to qualitative phytochemical screening and the microdilution broth method was used for antibacterial assays. The results of phytochemical tests indicate that all tested crude extracts contained polyphenols, flavonoids, triterpenes, and steroids...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28904920/antimicrobial-susceptibility-pattern-of-extended-spectrum-beta-lactamases-producing-organisms-isolated-in-a-tertiary-care-hospital-bangladesh
#13
Mohammad Jobayer, Zeenat Afroz, Sultana Shazeda Nahar, Ayesha Begum, Shahin Ara Begum, S M Shamsuzzaman
CONTEXT: Infection caused by extended-spectrum beta-lactamases (ESBL) producing organism is a major problem regarding antibiotic resistance. AIMS: The aim of this study was to find out the antibiogram of ESBL producing organisms isolated from various samples. SETTINGS AND DESIGN: This cross-sectional study was carried out in the Department of Microbiology of a Tertiary Care Hospital, Dhaka, Bangladesh from January to June 2014. SUBJECTS AND METHODS: One Hundred and seventy-nine ESBL producing Gram-negative organisms detected phenotypically by double-disc synergy test were enrolled in this study...
July 2017: International Journal of Applied and Basic Medical Research
https://www.readbyqxmd.com/read/28904433/risk-factors-for-urinary-tract-infections-in-renal-allograft-recipients-experience-of-a-tertiary-care-center-in-hyderabad-south-india
#14
M V N L R Mohan, M Neeraja, S Sudhaharan, S B Raju, T Gangadhar, V Lakshmi
Renal transplantation is an effective and commonly performed procedure for end-stage renal disease. Urinary tract infections are a major cause of morbidity and mortality in renal transplant patients. As data on postrenal transplant urinary tract infections from the Indian subcontinent are limited, the present study was conducted to estimate the burden of urinary tract infections in this vulnerable group of patients. This was a prospective study on patients undergoing renal transplantation in 2014 at our tertiary hospital in South India with a follow-up of 2 years to evaluate the risk factors for urinary tract infections...
September 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28904387/bacterial-distributions-and-prognosis-of-bloodstream-infections-in-patients-with-liver-cirrhosis
#15
Yangxin Xie, Bo Tu, Zhe Xu, Xin Zhang, Jingfeng Bi, Min Zhao, Weiwei Chen, Lei Shi, Peng Zhao, Chunmei Bao, Enqiang Qin, Dongping Xu
Bloodstream infections (BSIs) are a frequently observed complication in liver cirrhosis patients. This study aimed to investigate the microbiological characteristics and outcomes of BSIs in patients with liver cirrhosis. We retrospectively studied 852 patients with liver cirrhosis who developed a BSI. Patient outcome was evaluated using 30-day mortality and assessed using multivariate stepwise logistic regression analysis. Antibiotic sensitivity of the pathogens was tested. Gram-negative bacteria were responsible for 59...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28901793/intravenous-fosfomycin-for-the-treatment-of-hospitalized-patients-with-serious-infections
#16
Andrew F Shorr, Jason M Pogue, John F Mohr
With the worldwide increase in the rates of antimicrobial resistance, antimicrobials with novel mechanisms of action are needed to fill a void in the antimicrobial armamentarium. Areas Covered: Intravenous fosfomycin has been studied extensively in a wide variety of infections including cUTI, lower respiratory tract infection, bone and joint infections, endocarditis, meningitis, and bacteremia outside of the United States. This paper reviews the in vitro activity, pharmacokinetic properties, and clinical experience of intravenous fosfomycin in hospitalized patients with serious infections...
September 13, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28901726/antimicrobial-stewardship-in-paediatric-oncology-impact-on-optimising-gentamicin-use-in-febrile-neutropenia
#17
Stefanie Hennig, Christine E Staatz, Daniel Natanek, Sabina Bialkowski, Carolina Consuelo Llanos Paez, Rachael Lawson, Julia Clark
OBJECTIVES: To evaluate the impact of an antimicrobial stewardship (AMS) intervention, involving introduction of new guidelines on the treatment of febrile neutropenia (FN), on improving the use of gentamicin in paediatric oncology patients. DESIGN AND INTERVENTION: Updated guidelines for gentamicin usage in paediatrics with FN were implemented at a tertiary children's teaching hospital, in Brisbane, Australia. Data on gentamicin usage before and after the guideline change were collected retrospectively from children with cancer admitted to hospital with FN between January 2012 and December 2013...
September 13, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28900026/activity-related-conformational-changes-in-d-d-carboxypeptidases-revealed-by-in-vivo-periplasmic-f%C3%A3-rster-resonance-energy-transfer-assay-in-escherichia-coli
#18
Nils Y Meiresonne, René van der Ploeg, Mark A Hink, Tanneke den Blaauwen
One of the mechanisms of β-lactam antibiotic resistance requires the activity of d,d-carboxypeptidases (d,d-CPases) involved in peptidoglycan (PG) synthesis, making them putative targets for new antibiotic development. The activity of PG-synthesizing enzymes is often correlated with their association with other proteins. The PG layer is maintained in the periplasm between the two membranes of the Gram-negative cell envelope. Because no methods existed to detect in vivo interactions in this compartment, we have developed and validated a Förster resonance energy transfer assay...
September 12, 2017: MBio
https://www.readbyqxmd.com/read/28898859/antibacterial-clay-against-gram-negative-antibiotic-resistant-bacteria
#19
Luis Zarate-Reyes, Cynthia Lopez-Pacheco, Antonio Nieto-Camacho, Eduardo Palacios, Virginia Gómez-Vidales, Stephan Kaufhold, Kristian Ufer, Eduardo García Zepeda, Javiera Cervini-Silva
Antibiotic resistant bacteria persist throughout the world because they have evolved the ability to express various defense mechanisms to cope with antibiotics and the immune system; thus, low-cost strategies for the treatment of these bacteria are needed, such as the usage of environmental minerals. This paper reports the antimicrobial properties of a clay collected from Brunnenberg, Germany, that is composed of ferroan saponite with admixtures of quartz, feldspar and calcite as well as exposed or hidden (layered at inner regions) nano Fe(0)...
September 1, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28895051/polymyxin-resistance-in-gram-negative-pathogens
#20
REVIEW
Pavithra Srinivas, Kaitlyn Rivard
PURPOSE OF REVIEW: The polymyxins are one of the last line antimicrobial classes to retain activity against multidrug-resistant Gram-negative bacilli. However, with the increased use of polymyxins in recent years, reports of resistance have also been increasing. We aimed to describe the mechanisms and occurrence of polymyxin resistance in Gram-negative organisms and propose strategies to overcome resistance. RECENT FINDINGS: The most common mechanism of acquired resistance to the polymyxins is via modification of the bacterial outer membrane lipopolysaccharide...
September 11, 2017: Current Infectious Disease Reports
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