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Uropathogen

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https://www.readbyqxmd.com/read/28649705/naoh-hcl-neutralized-urine-preparation-for-direct-testing-of-uropathogens-by-bruker-ms
#1
Ji Seon Choi, Jayoung Kim, Han-Soo Kim, Chang-Wan Kwon, Min-Sung Kim, Seong-Hyeok Choi
BACKGROUND: We evaluated the analytical performance of a NaOH-HCl neutralization protocol for identifying uropathogens directly from urine samples by a Bruker MS system (Bruker Daltonics, German) and sought to establish a protocol for integrating the method with conventional screening. METHODS: Among all urine samples requested for Gram staining, UF-1000i, and urine cultures by physicians, we selected samples that were positive by both Gram staining and UF-1000i testing...
June 26, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28642992/plasmid-mediated-quinolone-resistance-pmqr-genes-and-class-1-integrons-in-quinolone-resistant-marine-bacteria-and-clinical-isolates-of-escherichia-coli-from-an-aquacultural-area
#2
Alexandra Tomova, Larisa Ivanova, Alejandro H Buschmann, Henry P Godfrey, Felipe C Cabello
Antimicrobial usage in aquaculture selects for antimicrobial-resistant microorganisms in the marine environment. The relevance of this selection to terrestrial animal and human health is unclear. Quinolone-resistance genes qnrA, qnrB, and qnrS were chromosomally located in four randomly chosen quinolone-resistant marine bacteria isolated from an aquacultural area with heavy quinolone usage. In quinolone-resistant uropathogenic clinical isolates of Escherichia coli from a coastal area bordering the same aquacultural region, qnrA was chromosomally located in two E...
June 23, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28642845/metabolic-adaptations-of-uropathogenic-e-coli-in-the-urinary-tract
#3
REVIEW
Riti Mann, Daniel G Mediati, Iain G Duggin, Elizabeth J Harry, Amy L Bottomley
Escherichia coli ordinarily resides in the lower gastrointestinal tract in humans, but some strains, known as Uropathogenic E. coli (UPEC), are also adapted to the relatively harsh environment of the urinary tract. Infections of the urine, bladder and kidneys by UPEC may lead to potentially fatal bloodstream infections. To survive this range of conditions, UPEC strains must have broad and flexible metabolic capabilities and efficiently utilize scarce essential nutrients. Whole-organism (or "omics") methods have recently provided significant advances in our understanding of the importance of metabolic adaptation in the success of UPECs...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28635280/anti-adhesive-activity-and-metabolomics-analysis-of-rat-urine-after-cranberry-vaccinium-macrocarpon-aiton-administration
#4
Gregorio Peron, Pellizzaro Anna, Brun Paola, Elisabetta Schievano, Stefano Mammi, Stefania Sut, Ignazio Castagliuolo, Stefano Dall'Acqua
Cranberry (Vaccinium macrocarpon Aiton) is used to treat non-complicated urinary tract infections (UTIs). A-type procyanidins (PAC-A) are considered the active constituents being able to inhibit bacterial adhesion to the urinary epithelium. However, there are doubts about PAC-A role in UTIs, due to their poor bioavailability, extensive metabolism, limited knowledge about urinary excretion and contradictory clinical trials. The effects of 35 days cranberry (11 mg/kg PAC-A, 4 mg/kg PAC-B) supplementation were studied in healthy rats using a UPLC-MS-based metabolomics approach...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28631909/-characterization-of-microbial-flora-in-patients-suspected-of-having-urogenital-tuberculosis
#5
A G Cherednichenko, E V Kulchavenya
INTRODUCTION: In the structure of tuberculosis morbidity, urogenital tuberculosis (UGT) ranks second or third only to pulmonary tuberculosis. Every fourth patient has the stage of cavern formation at first presentation. Seventy five percent of nephrotuberculosis cases co-occur with nonspecific pyelonephritis, which excludes "sterile pyuria". We aimed to determine the microbial spectrum of urine and gonadal appendages in patients with suspected UGT and to investigate the susceptibility of the isolated microorganisms to the main antibacterial drugs...
June 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28630128/identification-of-a-d-arabinose-5-phosphate-isomerase-in-the-gram-positive-clostridium-tetani
#6
David L Cech, Katherine Markin, Ronald W Woodard
d-Arabinose-5-phosphate isomerases (APIs) catalyze the interconversion of d-ribulose-5-phosphate and d-arabinose-5-phosphate. Various Gram-negative bacteria, such as the uropathogenic E. coli strain CFT073, contain multiple API paralogs (KdsD, GutQ, KpsF and c3406) that have been assigned various cellular functions. The d-arabinose-5-phosphate formed by these enzymes seems to play important roles in the biosynthesis of lipopolysaccharide and group 2 K-antigen capsules, as well as in the regulation of the cellular d-glucitol uptake and uropathogenic infectivity/virulence...
June 19, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28621642/spectrum-and-antibiotic-resistance-of-uropathogens-between-2004-and-2015-in-a-tertiary-care-hospital-in-hungary
#7
András Magyar, Béla Köves, Károly Nagy, András Dobák, Vinodh Kumar Adithyaa Arthanareeswaran, Péter Bálint, Florian Wagenlehner, Péter Tenke
PURPOSE: Surveillance of the bacterial spectrum and antibiotic-resistance patterns of locally occurring uropathogens is essential to serve as a basis for empirical treatment of urinary tract infections (UTIs), as antibiotic-resistance rates may vary geographically with significant differences between countries and regions, and with time. METHODOLOGY: We retrospectively analysed all urine samples taken in the department of urology in a tertiary care hospital in Hungary from January 2004 to December 2015...
June 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28614296/selective-depletion-of-uropathogenic-e-coli-from-the-gut-by-a-fimh-antagonist
#8
Caitlin N Spaulding, Roger D Klein, Ségolène Ruer, Andrew L Kau, Henry L Schreiber, Zachary T Cusumano, Karen W Dodson, Jerome S Pinkner, Daved H Fremont, James W Janetka, Han Remaut, Jeffrey I Gordon, Scott J Hultgren
Urinary tract infections (UTIs) caused by uropathogenic Escherichia coli (UPEC) affect 150 million people annually. Despite effective antibiotic therapy, 30-50% of patients experience recurrent UTIs. In addition, the growing prevalence of UPEC that are resistant to last-line antibiotic treatments, and more recently to carbapenems and colistin, make UTI a prime example of the antibiotic-resistance crisis and emphasize the need for new approaches to treat and prevent bacterial infections. UPEC strains establish reservoirs in the gut from which they are shed in the faeces, and can colonize the periurethral area or vagina and subsequently ascend through the urethra to the urinary tract, where they cause UTIs...
June 14, 2017: Nature
https://www.readbyqxmd.com/read/28597829/urogenital-infection-as-a-risk-factor-for-male-infertility
#9
Hans-Christian Schuppe, Adrian Pilatz, Hamid Hossain, Thorsten Diemer, Florian Wagenlehner, Wolfgang Weidner
BACKGROUND: Infections of the genital tract are considered common causes of male fertility disorders, with a prevalence of 6-10%. Most of the affected men are asymptomatic. The diagnostic evaluation is based mainly on laboratory testing. Inconsistent diagnostic criteria have been applied to date, and this may explain the controversial debate about the role of infection and inflammation in the genital tract as a cause of infertility. The risk of an irreversible fertility disorder should not be underestimated...
May 12, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/28594893/pandemic-extra-intestinal-pathogenic-escherichia-coli-expec-clonal-group-o6-b2-st73-as-a-cause-of-avian-colibacillosis-in-brazil
#10
Marcos Paulo Vieira Cunha, Andre Becker Saidenberg, Andrea Micke Moreno, Antonio José Piantino Ferreira, Mônica Aparecida Midolli Vieira, Tânia Aparecida Tardelli Gomes, Terezinha Knöbl
Extra-intestinal pathogenic Escherichia coli (ExPEC) represent an emerging pathogen, with pandemic strains increasingly involved in cases of urinary tract infections (UTIs), bacteremia, and meningitis. In addition to affecting humans, the avian pathotype of ExPEC, avian pathogenic E. coli (APEC), causes severe economic losses to the poultry industry. Several studies have revealed overlapping characteristics between APEC and human ExPEC, leading to the hypothesis of a zoonotic potential of poultry strains. However, the description of certain important pandemic clones, such as Sequence Type 73 (ST73), has not been reported in food sources...
2017: PloS One
https://www.readbyqxmd.com/read/28591134/global-gene-expression-profiling-and-antibiotic-susceptibility-after-repeated-exposure-to-the-carbon-monoxide-releasing-molecule-2-corm-2-in-multidrug-resistant-esbl-producing-uropathogenic-escherichia-coli
#11
Charlotte Sahlberg Bang, Isak Demirel, Robert Kruse, Katarina Persson
Treatment of urinary tract infections is today a challenge due to the increasing prevalence of multidrug-resistant ESBL-producing uropathogenic Escherichia coli (UPEC). There is an urgent need for new treatment strategies for multidrug-resistant UPEC and preferably with targets that have low potential for development of resistance. Carbon monoxide-releasing molecules (CORMs) are novel and potent antibacterial agents. The present study examines the transcriptomic targets of CORM-2 in a multidrug-resistant ESBL-producing UPEC isolate in response to a single exposure to CORM-2 and after repeated exposure to CORM-2...
2017: PloS One
https://www.readbyqxmd.com/read/28584456/isolation-rate-and-clinical-significance-of-uropathogens-in-positive-urine-cultures-of-hemodialysis-patients
#12
Katerina G Oikonomou, Adib Alhaddad
BACKGROUND: Hemodialysis (HD) patients are known to be vulnerable to infections. However, there are limited data on the urine microbiology spectrum among patients with end-stage renal disease and on the development of antimicrobial resistance of uropathogens in these patients. MATERIALS AND METHODS: A single-center, retrospective study was conducted to assess the spectrum and antimicrobial resistance profile of microorganisms isolated in urine cultures of HD patients who were hospitalized between September 2008 and August 2015 with an admitting diagnosis of fever, sepsis, or urinary tract infection...
April 2017: Journal of Global Infectious Diseases
https://www.readbyqxmd.com/read/28578087/role-of-antioxidant-defence-renal-toxicity-markers-and-inflammatory-cascade-in-disease-progression-of-acute-pyelonephritis-in-experimental-rat-model
#13
A Vysakh, Nair R Raji, D Suma, Kuriakose Jayesh, Mathew Jyothis, M S Latha
Urinary tract infections are the most common bacterial infections affecting millions of people each year worldwide. The animal model provides an excellent and suitable system for studying cystitis and pyelonephritis caused by Escherichia coli and other uropathogens. Using this established model, we evaluate the role of antioxidant defence system, renal injury markers, and blood parameters in the diseases progression during Escherichia coli infection on 0(th) day, 12h and 7(th) day. The antioxidant enzymes like SOD, CAT, GSH, GPx, GR levels were evaluated...
May 31, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28562631/synergistic-antibiofilm-efficacy-of-a-gallotannin-1-2-6-tri-o-galloyl-%C3%AE-d-glucopyranose-from-terminalia-chebula-fruit-in-combination-with-gentamicin-and-trimethoprim-against-multidrug-resistant-uropathogenic-escherichia-coli-biofilms
#14
Anwesa Bag, Rabi Ranjan Chattopadhyay
In recent years the emergence of multiple drug resistance microbes has become a global public health problem. The aim of the present investigation was to evaluate possible antibiofilm efficacy of a gallotannin 1,2,6-tri-O-galloyl-β-D-glucopyranose from Terminalia chebula fruits alone and in combination with gentamicin and trimethoprim against preformed biofilms of multidrug-resistant (MDR) uropathogenic E. coli isolates using microbroth dilution, checkerboard titration and kill kinetics methods. Test gallotannin showed > 50% antibiofilm efficacy after 24 h when administered alone whereas gentamicin and trimethoprim failed to do so...
2017: PloS One
https://www.readbyqxmd.com/read/28561794/antibiotic-resistance-and-virulence-phenotypes-of-recent-bacterial-strains-isolated-from-urinary-tract-infections-in-elderly-patients-with-prostatic-disease
#15
Cristina Delcaru, Paulina Podgoreanu, Ionela Alexandru, Nela Popescu, Luminiţa Măruţescu, Coralia Bleotu, George Dan Mogoşanu, Mariana Carmen Chifiriuc, Marinela Gluck, Veronica Lazăr
Acute bacterial prostatitis is one of the frequent complications of urinary tract infection (UTI). From the approximately 10% of men having prostatitis, 7% experience a bacterial prostatitis. The purpose of this study was to investigate the prevalence of uropathogens associated with UTIs in older patients with benign prostatic hyperplasia and to assess their susceptibility to commonly prescribed antibiotics as well as the relationships between microbial virulence and resistance features. Uropathogenic Escherichia coli was found to be the most frequent bacterial strain isolated from patients with benign prostatic hyperplasia, followed by Enterococcus spp...
May 31, 2017: Pathogens
https://www.readbyqxmd.com/read/28559163/a-cost-saving-strategy-for-processing-isolated-uropathogens-in-community-acquired-urinary-tract-infections
#16
Juan Manuel Sánchez-Calvo, José Luís de Francisco, Eva Torres-Martos, Juan Carlos Alados Arboledas, Maria Dolores López Prieto
Outpatient urine samples are among the most commonly processed in a microbiology laboratory, which involves a high economic burden. The aim of this study was compare cost and efficiency to process uropathogens between MicroScan system (2010-2011) versus a chromogenic medium and the disk diffusion method (2013-2014). In the first period, a total 9918 bacterial populations were isolated from urine samples. Annual estimated costs during 2010 and 2011 for processing were EUR 53,818 and EUR 57,306, respectively (EUR 111,124 total)...
May 27, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28550944/-omic-approaches-to-study-uropathogenic-escherichia-coli-virulence
#17
REVIEW
Alvin W Lo, Danilo G Moriel, Minh-Duy Phan, Benjamin L Schulz, Timothy J Kidd, Scott A Beatson, Mark A Schembri
Uropathogenic Escherichia coli (UPEC) is a pathogen of major significance to global human health and is strongly associated with rapidly increasing antibiotic resistance. UPEC is the primary cause of urinary tract infection (UTI), a disease that involves a complicated pathogenic pathway of extracellular and intracellular lifestyles during interaction with the host. The application of multiple 'omic' technologies, including genomics, transcriptomics, proteomics, and metabolomics, has provided enormous knowledge to our understanding of UPEC biology...
May 24, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28545489/cytotoxic-necrotizing-factor-1-cnf1-does-not-promote-e-coli-infection-in-a-murine-model-of-ascending-pyelonephritis
#18
Jason E Michaud, Kwang Sik Kim, William Harty, Matthew Kasprenski, Ming-Hsien Wang
BACKGROUND: Urinary tract infections (UTI) are among the most common and costly infections in both hospitalized and ambulatory patients. Uropathogenic E. coli (UPEC) represent the majority of UTI isolates and are a diverse group of bacteria that utilize a variety of virulence factors to establish infection of the genitourinary tract. The virulence factor cytotoxic necrotizing factor-1 (CNF1) is frequently expressed in clinical UPEC isolates. To date, there have been conflicting reports on the role of CNF1 in the pathogenesis of E...
May 25, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28536675/an-overview-of-two-component-signal-transduction-systems-implicated-in-extra-intestinal-pathogenic-e-coli-infections
#19
REVIEW
Erin J Breland, Allison R Eberly, Maria Hadjifrangiskou
Extra-intestinal pathogenic E. coli (ExPEC) infections are common in mammals and birds. The predominant ExPEC types are avian pathogenic E. coli (APEC), neonatal meningitis causing E. coli/meningitis associated E. coli (NMEC/MAEC), and uropathogenic E. coli (UPEC). Many reviews have described current knowledge on ExPEC infection strategies and virulence factors, especially for UPEC. However, surprisingly little has been reported on the regulatory modules that have been identified as critical in ExPEC pathogenesis...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28536290/peptidoglycan-association-of-murein-lipoprotein-is-required-for-kpsd-dependent-group-2-capsular-polysaccharide-expression-and-serum-resistance-in-a-uropathogenic-escherichia-coli-isolate
#20
Jingyu Diao, Catrien Bouwman, Donghong Yan, Jing Kang, Anand K Katakam, Peter Liu, Homer Pantua, Alexander R Abbas, Nicholas N Nickerson, Cary Austin, Mike Reichelt, Wendy Sandoval, Min Xu, Chris Whitfield, Sharookh B Kapadia
Murein lipoprotein (Lpp) and peptidoglycan-associated lipoprotein (Pal) are major outer membrane lipoproteins in Escherichia coli Their roles in cell-envelope integrity have been documented in E. coli laboratory strains, and while Lpp has been linked to serum resistance in vitro, the underlying mechanism has not been established. Here, lpp and pal mutants of uropathogenic E. coli strain CFT073 showed reduced survival in a mouse bacteremia model, but only the lpp mutant was sensitive to serum killing in vitro The peptidoglycan-bound Lpp form was specifically required for preventing complement-mediated bacterial lysis in vitro and complement-mediated clearance in vivo Compared to the wild-type strain, the lpp mutant had impaired K2 capsular polysaccharide production and was unable to respond to exposure to serum by elevating capsular polysaccharide amounts...
May 23, 2017: MBio
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