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https://www.readbyqxmd.com/read/28645003/structure-and-gene-cluster-of-the-o-antigen-of-enterobacter-cloacae-c4115
#1
Andrei V Perepelov, Guangnan Xu, Andrei V Filatov, Xinjie Zhang, Alexander S Shashkov, Min Wang, Yuriy A Knirel
An O-polysaccharide was isolated by mild acid degradation of the lipopolysaccharide of Enterobacter cloacae C4115 and studied by sugar analysis along with 1D and 2D (1)H and (13)C NMR spectroscopy. The following structure of the linear pentasaccharide repeating unit of the O-polysaccharide was established: →2)-α-l-Rhap-(1 → 2)-α-l-Rhap-(1 → 2)-α-l-Rhap-(1 → 2)-α-d-Galp-(1 → 3)-α-d-FucpNAc-(1→ The O-antigen gene cluster of E. cloacae C4115 was sequenced. The gene functions were tentatively assigned by comparison with sequences in the available databases and found to be in consistence with the O-polysaccharide structure...
June 3, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28642945/nonribosomal-peptide-synthetase-biosynthetic-clusters-of-eskape-pathogens
#2
REVIEW
Andrew M Gulick
Covering: up to 2017.Natural products are important secondary metabolites produced by bacterial and fungal species that play important roles in cellular growth and signaling, nutrient acquisition, intra- and interspecies communication, and virulence. A subset of natural products is produced by nonribosomal peptide synthetases (NRPSs), a family of large, modular enzymes that function in an assembly line fashion. Because of the pharmaceutical activity of many NRPS products, much effort has gone into the exploration of their biosynthetic pathways and the diverse products they make...
June 23, 2017: Natural Product Reports
https://www.readbyqxmd.com/read/28642140/emergence-of-carbapenem-resistant-enterobacteriaceae-isolated-from-patients-in-a-university-hospital-in-saudi-arabia-epidemiology-clinical-profiles-and-outcomes
#3
Fawzia E Alotaibi, Elham E Bukhari, Maha M Al-Mohizea, Taghreed Hafiz, Eman Bin Essa, Yasmeen I AlTokhais
Carbapenemase-producing Enterobacteriaceae have been steadily spreading worldwide during the last decade. Nine patients were identified prospectively and were followed during their hospitalization course to identify the epidemiology, clinical profiles and outcomes. These patients had one or more cultures positive for a CRE isolate, contributing to a total of eleven positive cultures from various sites without including duplicates of isolates obtained from the same site. Isolates from these patients included five Klebseilla pneumoniae, three Escherichia coli, and one Enterobacter aerogenes...
June 19, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28641915/the-antimicrobial-spectrum-of-xeroform-%C3%A2
#4
David J Barillo, Anthony R Barillo, Sarah Korn, Kan Lam, Paul S Attar
INTRODUCTION/BACKGROUND: Xeroform(®) is a petrolatum-based fine mesh gauze containing 3% bismuth tribromophenate. Bismuth, similar to other metals, has antimicrobial properties. Xeroform(®) has been used for decades in burn and plastic surgery as a donor site dressing and as a covering for wounds or partial thickness burns. Despite this, the antimicrobial spectrum of Xeroform(®) remains largely unknown. We examined the in-vitro efficacy of Xeroform(®) against common burn pathogens using zone-of-inhibition methodology in a commercial research facility...
June 19, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28641525/1-1%C3%AA-carbonyldiimidazole-cdi-mediated-facile-synthesis-structural-characterization-antimicrobial-activity-and-in-silico-studies-of-coumarin-3-carboxamide-derivatives
#5
Uzma Salar, Khalid Mohammed Khan, Muhammad Imran Fakhri, Shafqat Hussain, Saima Tauseef, Shagufta Ameer, Abdul Wadood, Huma Khan, Shahnaz Perveen
BACKGROUND: Despite of the availability of variety of antibacterial agents, re-emergance of pathogenic bacteria is still a serious medical concern. So, identification of new, safer, and selective antibacterial agents is the key interest in the medicinal chemistry research. METHOD: To explore the antimicrobial activity of coumarin-3-carboxamides for a range of bacterial and fungal strains, twenty eight derivatives were synthesized by the reaction of coumarin-3-carboxylic acid with a variety of aniline derivatives in the presence of 1,1ꞌ-carbonyldiimidazole (CDI)...
June 22, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28640920/pathogen-specific-mortality-in-very-low-birth-weight-infants-with-primary-bloodstream-infection
#6
Brar C Piening, Christine Geffers, Petra Gastmeier, Frank Schwab
OBJECTIVE: Mortality in very low birth weight infants following microbiology confirmed primary bloodstream infections varies with the type of causative pathogen. Given evidence from other studies that infections with gram negative bacteria and fungi cause a higher case fatality risk. We tried to confirm this in a nation-wide multi-center trial. METHODS: A cohort of 55,465 very low birth weight infants from 242 neonatal departments participating in the German national neonatal infection surveillance system NEO-KISS was used to investigate differences in the case fatality risk of microbiology confirmed primary bloodstream infections according to individual pathogens...
2017: PloS One
https://www.readbyqxmd.com/read/28639414/brachiaria-grasses-brachiaria-spp-harbor-a-diverse-bacterial-community-with-multiple-attributes-beneficial-to-plant-growth-and-development
#7
Collins Mutai, Joyce Njuguna, Sita Ghimire
Endophytic and plant-associated bacteria were isolated from plants and rhizoplane soil of naturally grown Brachiaria grasses at International Livestock Research Institute in Nairobi, Kenya. Eighty-four bacterial strains were isolated from leaf tissues, root tissues, and rhizoplane soil on nutrient agar and 869 media. All bacterial strains were identified to the lowest possible taxonomic unit using 16S rDNA primers and were characterized for the production of Indole-3-acetic acid, hydrogen cyanide, and ACC deaminase; phosphate solubilization; siderophore production; antifungal properties; and plant biomass production...
June 21, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28637845/successful-conservative-management-of-a-permanent-pacemaker-pocket-infection-a-less-invasive-approach
#8
Alexander James Keeley, Daniel Hammersley, Madhava Dissanayake
We present a successful conservative management strategy for a frail elderly patient with a cardiac resynchronisation pacemaker who presented with evidence of an Enterobacter cloacae pacemaker pocket infection. A device washout and debridement procedure was performed, with reburial of the device in a new prepectoral pocket and creation of a closed-loop continuous antibiotic infusion into the infected pacemaker pocket. This was followed by a 6-week course of ambulatory intravenous antibiotic therapy. This conservative management strategy avoided the need for a more invasive and high-risk full device extraction, which the patient clearly stated he did not wish to have...
June 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28636666/molecular-and-microbiological-report-of-a-hospital-outbreak-of-ndm-1-carrying-enterobacteriaceae-in-mexico
#9
Paola Bocanegra-Ibarias, Elvira Garza-González, Rayo Morfín-Otero, Humberto Barrios, Licet Villarreal-Treviño, Eduardo Rodríguez-Noriega, Ulises Garza-Ramos, Santiago Petersen-Morfin, Jesus Silva-Sanchez
OBJECTIVES: To characterize the microbiological, molecular and epidemiological data of an outbreak of carbapenem-resistant Enterobacteriaceae (CRE) in a tertiary-care hospital in Mexico. METHODS: From September 2014 to July 2015, all CRE clinical isolates recovered during an outbreak in the Hospital Civil "Fray Antonio Alcalde" in Jalisco, Mexico were screened for antimicrobial susceptibility, carbapenemase production, carbapenemase-encoding genes, and plasmid profiles...
2017: PloS One
https://www.readbyqxmd.com/read/28636609/genomic-and-phenotypic-characterisation-of-fluoroquinolone-resistance-mechanisms-in-enterobacteriaceae-in-durban-south-africa
#10
John Osei Sekyere, Daniel Gyamfi Amoako
Resistance to fluoroquinolones (FQ) is being increasingly reported and found to be mediated by efflux pumps, plasmid-mediated quinolone resistance genes (PMQR) and mutations in gyrA, gyrB, parC and parE. However, studies reporting on FQ resistance mechanisms (FQRM), particularly in Africa, are focused mostly on Salmonella. This study used a whole-genome-based approach to describe FQRM in forty-eight clinical Enterobacteriaceae isolates comprising of Klebsiella pneumoniae (n = 21), Serratia marcescens (n = 12), Enterobacter spp...
2017: PloS One
https://www.readbyqxmd.com/read/28633512/media-optimization-for-economic-succinic-acid-production-by-enterobacter-sp-lu1
#11
Marcin Podleśny, Agnieszka Kubik-Komar, Jagoda Kucharska, Jakub Wyrostek, Piotr Jarocki, Zdzisław Targoński
Enterobacter sp. LU1 could efficiently convert glycerol to succinic acid under anaerobic conditions after the addition of lactose. In this study, media constituents affecting both Enterobacter sp. LU1 biomass and succinic acid production were investigated employing response surface methodology (RSM) with central composite design. Statistical methods led to the development of an efficient and inexpensive microbiological media based on crude glycerol, whey permeate as carbon sources and urea as a nitrogen source...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28631638/clinicomicrobiological-profile-of-endophthalmitis-a-10-year-experience-in-a-tertiary-care-center-in-north-india
#12
Gita Satpathy, Niranjan Nayak, Meenakshi Wadhwani, Pradeep Venkwatesh, Atul Kumar, Yograj Sharma, Vishnu Sreenivas
PURPOSE: To determine the clinicomicrobiological profile of infectious agents and their antibiotic susceptibility in different type of endophthalmitis. METHODS: A retrospective review of clinical and microbiological records from January 2001 to December 2010, was performed in 1110 patients diagnosed with different type of endophthalmitis (postoperative, posttraumatic, endogenous and post keratitis) to record the demographic details, clinical presentations; microbiological agents isolated with their antimicrobial sensitivity pattern...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28630688/prevalence-of-antimicrobial-resistant-pathogens-from-blood-cultures-results-from-a-laboratory-based-nationwide-surveillance-in-ghana
#13
Japheth Awuletey Opintan, Mercy Jemima Newman
BACKGROUND: Blood stream infections (BSI) are critical medical conditions with high morbidity and mortality. There is paucity of information on BSI from surveillance studies in Ghana. AIM: This study sought to demonstrate how useful BSI data can be gleaned from population-based surveillance, especially from resource-limited settings. METHODS: Data from a nationwide surveillance of antimicrobial drug resistance (AMR) in Ghana were extracted and analyzed...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28630686/fecal-carriage-of-extended-spectrum-%C3%AE-lactamase-and-carbapenemase-producing-enterobacteriaceae-in-egyptian-patients-with-community-onset-gastrointestinal-complaints-a-hospital-based-cross-sectional-study
#14
H M Abdallah, N Alnaiemi, E A Reuland, B B Wintermans, A Koek, A M Abdelwahab, A Samy, K W Abdelsalam, C M J E Vandenbroucke-Grauls
OBJECTIVES: The aim of this study was to determine the prevalence of extended-spectrum β-lactamase (ESBL) and carbapenemase production among Enterobacteriaceae isolated from ambulatory patients with gastrointestinal complaints admitted to El-Ahrar General Hospital, Zagazig, Egypt in the period between January 2013 and May 2013. METHODS: One hundred and thirteen Enterobacteriaceae isolates were recovered from 100 consecutive Egyptian patients with community-onset gastrointestinal complaints...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28629757/bacterial-biofilm-based-catheter-associated-urinary-tract-infections-causative-pathogens-and-antibiotic-resistance
#15
Nargis Sabir, Aamer Ikram, Gohar Zaman, Luqman Satti, Adeel Gardezi, Abeera Ahmed, Parvez Ahmed
BACKGROUND: We sought to determine the incidence of bacterial biofilm-based catheter-associated urinary tract infections, identify variables affecting biofilm formation, and identify etiologic bacterial pathogens and antibiotic-resistance patterns associated with biofilm-based catheter-associated urinary tract infections (CAUTIs) in our setup. METHODS: Patients who developed at least 2 symptoms of urinary tract infection after at least 2 days of indwelling urinary catheters were included...
June 16, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28629229/colistin-resistance-associated-with-outer-membrane-protein-change-in%C3%A2-klebsiella-pneumoniae-and-enterobacter-asburiae
#16
Béla Kádár, Béla Kocsis, Ákos Tóth, Katalin Kristóf, Péter Felső, Béla Kocsis, Katalin Böddi, Dóra Szabó
In this study, outer membrane proteins (OMPs) of colistin-resistant Klebsiella pneumoniae and Enterobacter asburiae were analyzed. One colistin-susceptible and three colistin-resistant K. pneumoniae sequence type 258 strains as well as one colistin-susceptible E. asburiae and its colistin-heteroresistant counterpart strain were involved in the study. OMP analysis of each strain was performed by microchip method. Matrix-assisted laser desorption ionization time of flight/mass spectrometry (MALDI-TOF/MS) investigation was carried out after separation of OMPs by two-dimensional gel electrophoresis and in-gel digestion...
June 20, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28626552/a-new-microfluidic-approach-for-the-one-step-capture-amplification-and-label-free-quantification-of-bacteria-from-raw-samples
#17
Iago Pereiro, Amel Bendali, Sanae Tabnaoui, Lucile Alexandre, Jana Srbova, Zuzana Bilkova, Shane Deegan, Lokesh Joshi, Jean-Louis Viovy, Laurent Malaquin, Bruno Dupuy, Stéphanie Descroix
A microfluidic method to specifically capture and detect infectious bacteria based on immunorecognition and proliferative power is presented. It involves a microscale fluidized bed in which magnetic and drag forces are balanced to retain antibody-functionalized superparamagnetic beads in a chamber during sample perfusion. Captured cells are then cultivated in situ by infusing nutritionally-rich medium. The system was validated by the direct one-step detection of Salmonella Typhimurium in undiluted unskimmed milk, without pre-treatment...
February 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28621547/endophytic-bacteria-enhance-remediation-of-tannery-effluent-in-constructed-wetlands-vegetated-with-leptochloa-fusca
#18
Sobia Ashraf, Muhammad Afzal, Muhammad Naveed, Muhammad Shahid, Zahir Ahmad Zahir
The use of constructed wetlands (CWs) is a promising approach for the remediation of wastewater. The present study aims to develop a plant-bacterial system within CWs for efficient remediation of tannery effluent. In a vertical flow CW vegetated with Leptochloa fusca (Kallar grass), a consortium of three different endophytic bacteria, Pantoea stewartii ASI11, Microbacterium arborescens HU33, and Enterobacter sp. HU38, was used for bioaugmentation. Constructed wetlands vegetated with only L. fusca had the potential to remediate tannery effluent, but augmentation with endophytic bacteria enhanced the growth of L...
June 16, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28621110/characterization-of-microbial-communities-in-chinese-rice-wine-collected-at-yichang-city-and-suzhou-city-in-china
#19
Yucai Lyu, Yanli Gong, Yajie Li, Zejiang Pan, Yi Yao, Ning Li, Jinling Guo, Dachun Gong, Yihong Ti, Caiyun Peng
Two typical microbial communities from Chinese rice wine fermentation collected in Yichang city and Suzhou city in China were investigated. Both communities could ferment glutinous rice to rice wine in 2 d. The sugar and ethanol contents were 198.67 and 14.47 mg/g, respectively, for rice wine from Yichang city, and 292.50 and 12.31 mg/g, respectively, for rice wine from Suzhou city. Acetic acid and lactic acid were the most abundant organic acids. Abundant fungi and bacteria were detected in both communities by high-throughput sequencing...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28620255/detection-of-emerging-antibiotic-resistance-in-bacteria-isolated-from-subclinical-mastitis-in-cattle-in-west-bengal
#20
Arnab Das, Chanchal Guha, Ujjwal Biswas, Partha Sarathi Jana, Amaresh Chatterjee, Indranil Samanta
AIM: The aim of this work was to detect antibiotic resistance in Gram-negative bacteria isolated from subclinical mastitis in cattle in West Bengal. MATERIALS AND METHODS: The milk samples were collected from the cattle suffering with subclinical mastitis in West Bengal. The milk samples were inoculated into the nutrient broth and incubated at 37°C. On the next day, the growth was transferred into nutrient agar and MacConkey agar. All the pure cultures obtained from nutrient agar slant were subjected to Gram-staining and standard biochemical tests...
May 2017: Veterinary World
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