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https://www.readbyqxmd.com/read/28935107/glycoengineered-outer-membrane-vesicles-as-a-platform-for-vaccine-development
#1
Ezequiel Valguarnera, Mario F Feldman
As we enter into the postantibiotic era, vaccines to prevent bacterial infections previously treatable with antibiotics are urgently needed. Most successful antibacterial vaccines are glycoconjugates, composed of cell surface carbohydrates chemically attached to a carrier protein. Glycoconjugate vaccines provide a safe and consistent strategy against polysaccharide-encapsulated pathogens. The best examples are the conjugate vaccines against Haemophilus influenzae type b, Streptococcus pneumoniae, and Neisseria meningitidis, all based on capsular polysaccharides...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28933759/lactic-acid-bacteria-and-their-bacteriocins-classification-biosynthesis-and-applications-against-uropathogens-a-mini-review
#2
REVIEW
Mduduzi Paul Mokoena
Several lactic acid bacteria (LAB) isolates from the Lactobacillus genera have been applied in food preservation, partly due to their antimicrobial properties. Their application in the control of human pathogens holds promise provided appropriate strains are scientifically chosen and a suitable mode of delivery is utilized. Urinary tract infection (UTI) is a global problem, affecting mainly diabetic patients and women. Many uropathogens are developing resistance to commonly used antibiotics. There is a need for more research on the ability of LAB to inhibit uropathogens, with a view to apply them in clinical settings, while adhering to strict selection guidelines in the choice of candidate LAB...
July 26, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28924030/altered-regulation-of-the-diguanylate-cyclase-yaic-reduces-production-of-type-1-fimbriae-in-a-pst-mutant-of-uropathogenic-e-coli-cft073
#3
Sébastien Crépin, Gaëlle Porcheron, Sébastien Houle, Josée Harel, Charles M Dozois
The pst gene cluster encodes the phosphate specific transport system (Pst). Inactivation of the Pst system constitutively activates the two-component regulatory system PhoBR and attenuates virulence of pathogenic bacteria. In uropathogenic E. coli strain CFT073, attenuation by inactivation of pst is predominantly attributed to the decreased expression of type 1 fimbriae. However, the molecular mechanisms connecting the Pst system and type 1 fimbriae are unknown. To address this, a transposon library was constructed in the pst mutant, and clones were tested for a regain in type 1 fimbriae production...
September 18, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28922100/frequency-and-antibiotic-resistance-of-bacteria-implicated-in-community-urinary-tract-infections-in-north-aveiro-between-2011-and-2014
#4
Tânia Costa, Inês Linhares, Ricardo Ferreira, Jasmin Neves, Adelaide Almeida
AIMS: The present study aims to evaluate the predominance of uropathogens responsible for urinary tract infection (UTI) and determine their resistance patterns, to assess if the recommended empirical treatment is appropriate for the studied population. Samples were collected in Aveiro (Portugal) from an ambulatory service between June 2011 and June 2014. RESULTS: From the 4,270 positive urine samples for UTI, 3,561 (83%) were from women and only 709 (17%) were from men...
September 18, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28919055/antimicrobial-resistance-in-women-with-urinary-tract-infection-in-primary-care-no-relation-with-type-2-diabetes-mellitus
#5
Johanna E M Vinken, Helen E Mol, Theo J M Verheij, Sanne van Delft, Marion Kolader, Miquel B Ekkelenkamp, Guy E H M Rutten, Berna D L Broekhuizen
AIMS: To determine if type 2 diabetes mellitus (T2DM) is associated with the spectrum of uropathogens and antimicrobial resistance in urinary tract infections (UTI) in primary care. METHODS: A cross-sectional study in female outpatients ≥30 years with positive urine cultures. T2DM patients were 1:1 matched to controls by age group and general practitioner (GP). GPs were sent questionnaires for additional data. Uropathogens and resistance patterns were compared between patients with and without T2DM...
September 14, 2017: Primary Care Diabetes
https://www.readbyqxmd.com/read/28918351/susceptibility-profiles-of-bacteria-causing-urinary-tract-infection-in-southern-tunisia
#6
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/28913868/alterations-of-c-di-gmp-turnover-proteins-modulate-semi-constitutive-rdar-biofilm-formation-in-commensal-and-uropathogenic-escherichia-coli
#7
Annika Cimdins, Roger Simm, Fengyang Li, Petra Lüthje, Kaisa Thorell, Åsa Sjöling, Annelie Brauner, Ute Römling
Agar plate-based biofilm of enterobacteria like Escherichia coli is characterized by expression of the extracellular matrix components amyloid curli and cellulose exopolysaccharide, which can be visually enhanced upon addition of the dye Congo Red, resulting in a red, dry, and rough (rdar) colony morphology. Expression of the rdar morphotype depends on the transcriptional regulator CsgD and occurs predominantly at ambient temperature in model strains. In contrast, commensal and pathogenic isolates frequently express the csgD-dependent rdar morphotype semi-constitutively, also at human host body temperature...
September 15, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28910634/collaboration-between-distinct-rab-small-gtpase-trafficking-circuits-mediates-bacterial-clearance-from-the-bladder-epithelium
#8
Yuxuan Miao, Pradeep Bist, Jianxuan Wu, Qing Zhao, Qi-Jing Li, Ying Wan, Soman N Abraham
Rab small GTPases control membrane trafficking through effectors that recruit downstream mediators such as motor proteins. Subcellular trafficking typically involves multiple Rabs, with each specific step mediated by a distinct Rab protein. We describe a collaboration between two distinct Rab-protein-orchestrated trafficking circuits in bladder epithelial cells (BECs) that expels intracellular uropathogenic Escherichia coli (UPEC) from their intracellular niche. RAB11a and RAB27b and their trafficking circuitry are simultaneously involved in UPEC expulsion...
September 13, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28906365/the-antibiotic-susceptibility-patterns-of-uropathogens-among-children-with-urinary-tract-infection-in-shiraz
#9
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/28887442/targeting-deficiencies-in-the-tlr5-mediated-vaginal-response-to-treat-female-recurrent-urinary-tract-infection
#10
Ased S M Ali, Catherine Mowbray, Marcelo Lanz, Anna Stanton, Samantha Bowen, Claire L Varley, Paul Hilton, Karen Brown, Wendy Robson, Jennifer Southgate, Phillip D Aldridge, Alison Tyson-Capper, Soman Abraham, Robert S Pickard, Judith Hall
The identification of the host defence peptides as target effectors in the innate defence of the uro-genital tract creates new translational possibilities for immunomodulatory therapies, specifically vaginal therapies to treat women suffering from rUTI, particularly those carrying the TLR5_C1174T SNP. Urinary tract infections (UTIs) are a microbial disease reported worldwide. Women are particularly susceptible with many suffering debilitating recurrent (r) infections. Treatment is by antibiotics, but such therapy is linked to antibiotic resistance and re-infection...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28885414/urinary-symptoms-and-their-associations-with-urinary-tract-infections-in-urogynecologic-patients
#11
Tanaka J Dune, Travis K Price, Evann E Hilt, Krystal J Thomas-White, Stephanie Kliethermes, Cynthia Brincat, Linda Brubaker, Paul Schreckenberger, Alan J Wolfe, Elizabeth R Mueller
OBJECTIVE: To assess urinary symptoms associated with urinary tract infection (UTI) in a urogynecologic population of women. METHODS: In this cohort study, we enrolled 150 urogynecologic patients who completed the validated UTI Symptom Assessment questionnaire and contributed transurethral catheterized urine samples. The primary measure (UTI diagnosis) was defined in three ways. Self-report (a nonculture-based UTI diagnosis) was defined by a yes or no response to the query "Do you think you have a UTI?" Two culture-based UTI diagnoses also were analyzed: standard urine culture (10 colony-forming units [CFU]/mL or greater) and enhanced quantitative urine culture (10 CFU/mL or greater) of any uropathogen...
September 5, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28884476/probiotics-for-preventing-urinary-tract-infection-in-people-with-neuropathic-bladder
#12
REVIEW
Swee-Ling Toh, Claire L Boswell-Ruys, Bon San B Lee, Judy M Simpson, Kate R Clezy
BACKGROUND: Neuropathic or neurogenic bladder describes a process of dysfunctional voiding as the result of injury in the brain, spinal cord or nerves innervating the bladder. People with neuropathic bladder, such as from spinal cord injury (SCI), are at significant risk of morbidity from urinary tract infections (UTI). Effective methods to prevent UTI in people with SCI have been sought for many years. Probiotics (micro-organisms that exert beneficial health effects in the host) have been recommended for bacterial interference of the urological tract to reduce colonisation by uropathogen and to manage the dual problems of infection and antibiotic resistance...
September 8, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28882930/renal-scar-formation-and-kidney-function-following-antibiotic-treated-murine-pyelonephritis
#13
Patrick D Olson, Lisa K McLellan, Alice Liu, Kelleigh L Briden, Kristin M Tiemann, Allyssa L Daugherty, Keith A Hruska, David A Hunstad
We present a new preclinical model to study treatment, resolution, and sequelae of severe ascending pyelonephritis. Urinary tract infection (UTI), primarily caused by uropathogenic Escherichia coli (UPEC), is a common disease in children. Severe pyelonephritis is the primary cause of acquired renal scarring in childhood, which may eventually lead to hypertension and chronic kidney disease in a small but important fraction of patients. Preclinical modeling of UTI utilizes almost exclusively females, which (in most mouse strains) exhibit inherent resistance to severe ascending kidney infection; consequently, no existing preclinical model has assessed the consequences of recovery from pyelonephritis following antibiotic treatment...
September 7, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28882904/frontline-science-proliferation-of-ly6c-monocytes-during-urinary-tract-infections-is-regulated-by-il-6-trans-signaling
#14
Akanksha Dixit, Jenny Bottek, Anna-Lena Beerlage, Jana Schuettpelz, Stephanie Thiebes, Alexandra Brenzel, Christoph Garbers, Stefan Rose-John, Hans-Willi Mittrücker, Anthony Squire, Daniel R Engel
Ly6C(+) monocytes are important components of the innate immune defense against infections. These cells have been shown to proliferate in the bone marrow of mice with systemic infections. However, the proliferative capacity of Ly6C(+) monocytes in infected peripheral tissues as well as the associated regulatory mechanisms remain unclear. In this study, we analyzed the proliferative capacity of Ly6C(+) monocytes in the urinary bladder after infection with uropathogenic E. coli, one of the most prevalent pathogen worldwide, and in LPS-induced peritonitis...
September 7, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28867662/high-interindividual-variability-in-urinary-fosfomycin-concentrations-in-healthy-female-volunteers
#15
Rixt A Wijma, Birgit C P Koch, Teun van Gelder, Johan W Mouton
OBJECTIVES: Fosfomycin is increasingly being prescribed for the treatment of uncomplicated urinary tract infections in an era of emerging drug resistance. Surprisingly, little is known of the urinary concentrations of fosfomycin and its interindividual variation after the standard single 3 gram oral dose. We aimed to gain more insight into urinary fosfomycin pharmacokinetics to evaluate its effectiveness. METHODS: Three grams of fosfomycin trometamol was administered to 40 healthy female volunteers with an estimated mean glomerular filtration rate of > 90 mL/min/1...
August 31, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28861113/uropathogenic-escherichia-coli-st131-in-urinary-tract-infections-in-children
#16
Ki Wook Yun, Mi-Kyung Lee, Wonyong Kim, In Seok Lim
PURPOSE: Escherichia coli sequence type (ST) 131, a multidrug-resistant clone causing extraintestinal infections, has rapidly become prevalent worldwide. However, the epidemiological and clinical features of pediatric infections are poorly understood. We aimed to explore the characteristics of ST131 Escherichia coli isolated from Korean children with urinary tract infections. METHODS: We examined 114 uropathogenic E. coli (UPEC) isolates from children hospitalized at Chung-Ang University Hospital between 2011 and 2014...
July 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28861072/uropathogenic-escherichia-coli-upec-infections-virulence-factors-bladder-responses-antibiotic-and-non-antibiotic-antimicrobial-strategies
#17
REVIEW
Maria E Terlizzi, Giorgio Gribaudo, Massimo E Maffei
Urinary tract infections (UTIs) are one of the most common pathological conditions in both community and hospital settings. It has been estimated that about 150 million people worldwide develop UTI each year, with high social costs in terms of hospitalizations and medical expenses. Among the common uropathogens associated to UTIs development, UroPathogenic Escherichia coli (UPEC) is the primary cause. UPEC strains possess a plethora of both structural (as fimbriae, pili, curli, flagella) and secreted (toxins, iron-acquisition systems) virulence factors that contribute to their capacity to cause disease, although the ability to adhere to host epithelial cells in the urinary tract represents the most important determinant of pathogenicity...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28845948/-resistance-of-urinary-tract-pathogens-and-the-choice-of-antimicrobial-therapy-deceptive-simplicity
#18
V V Rafalskiy, E V Dovgan
Urinary tract infection (UTI) is one of the most common reasons for prescribing antibiotics in outpatient and inpatient settings. One of the main criteria for selecting antimicrobial drugs for treating UTI is data on the antibiotic resistance of uropathogens. The article discusses the difficulties in interpreting the results of antimicrobial sensitivity testing of uropathogens and the impact of antibiotic resistance of uropathogens on the clinical effectiveness of managing UTI.
July 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28845934/-troyakov-experience-in-using-hytolysin-in-the-integrated-management-of-urinary-tract-infections-and-methapylactics-of-nephrolithiasis
#19
V S Saenko, F P Kapsargin, S V Pesegov, V M
RELEVANCE: Urinary tract infection (UTI) are a risk factor for diseases leading to impairment of renal function and kidney stone disease (KSD). Growing resistance of uropathogens to antibacterial agents is a challenging issue in most countries of the world. Urolithiasis is the second most prevalent urologic condition following urinary tract infections and has a pronounced tendency to recur. Rational stone metaphylaxis leads to a significant reduction in the incidence of recurrent stones...
July 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28845933/-is-bacteriological-testing-of-bladder-urine-informative-in-acute-obstructive-pyelo-nephritis
#20
M I Kogan, Yu L Naboka, S K Bedzhanyan, E V Mitusova, I A Gudima, P P Morgun, L I Vasileva
The problem of the etiology and pathogenesis of acute obstructive pyelonephritis (OOP) remains one of the challenging issues of modern urology. Etiological agents of pyelonephritis can be both gram-negative and gram-positive opportunistic bacteria mostly belonging to the normal flora in humans. The generally accepted diagnostic work-up involves a bacteriological testing of not pelvic urine, but of bladder urine collected by a transurethral catheter or midstream specimens of urine collected from the patients...
July 2017: Urologii︠a︡
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