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https://www.readbyqxmd.com/read/28073961/genetic-characterization-of-mcr-1-bearing-plasmids-to-depict-molecular-mechanisms-underlying-dissemination-of-the-colistin-resistance-determinant
#1
Ruichao Li, Miaomiao Xie, Jinfei Zhang, Zhiqiang Yang, Lizhang Liu, Xiaobo Liu, Zhiwei Zheng, Edward Wai-Chi Chan, Sheng Chen
OBJECTIVES: To analyse and compare mcr-1-bearing plasmids from animal Escherichia coli isolates, and to investigate potential mechanisms underlying dissemination of mcr-1. METHODS: Ninety-seven ESBL-producing E. coli strains isolated from pig farms in China were screened for the mcr-1 gene. Fifteen mcr-1-positive strains were subjected to molecular characterization and bioinformatic analysis of the mcr-1-bearing plasmids that they harboured. RESULTS: Three major types of mcr-1-bearing plasmids were recovered: IncX4 (∼33 kb), IncI2 (∼60 kb) and IncHI2 (∼216-280 kb), among which the IncX4 and IncI2 plasmids were found to harbour the mcr-1 gene only, whereas multiple resistance elements including blaCTX-M, blaCMY, blaTEM, fosA, qnrS, floR and oqxAB were detected, in various combinations, alongside mcr-1 in the IncHI2 plasmids...
September 28, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28056081/comparative-exposure-assessment-of-esbl-producing-escherichia-coli-through-meat-consumption
#2
Eric G Evers, Annemarie Pielaat, Joost H Smid, Engeline van Duijkeren, Francy B C Vennemann, Lucas M Wijnands, Jurgen E Chardon
The presence of extended-spectrum β-lactamase (ESBL) and plasmidic AmpC (pAmpC) producing Escherichia coli (EEC) in food animals, especially broilers, has become a major public health concern. The aim of the present study was to quantify the EEC exposure of humans in The Netherlands through the consumption of meat from different food animals. Calculations were done with a simplified Quantitative Microbiological Risk Assessment (QMRA) model. The model took the effect of pre-retail processing, storage at the consumers home and preparation in the kitchen (cross-contamination and heating) on EEC numbers on/in the raw meat products into account...
2017: PloS One
https://www.readbyqxmd.com/read/28049493/presence-of-foodborne-pathogens-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-and-methicillin-resistant-staphylococcus-aureus-in-slaughtered-reindeer-in-northern-finland-and-norway
#3
Sauli Laaksonen, Antti Oksanen, Jérôme Julmi, Claudio Zweifel, Maria Fredriksson-Ahomaa, Roger Stephan
BACKGROUND: Various food-producing animals were recognized in recent years as healthy carriers of bacterial pathogens causing human illness. In northern Fennoscandia, the husbandry of semi-domesticated reindeer (Rangifer tarandus tarandus) is a traditional livelihood and meat is the main product. This study determined the presence of selected foodborne pathogens, methicillin-resistant Staphylococcus aureus (MRSA), and extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae in healthy semi-domesticated reindeer at slaughter in northern Finland and Norway...
January 3, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28036049/antimicrobial-resistant-enteropathogenic-escherichia-coli-and-salmonella-spp-in-houseflies-infesting-fish-in-food-markets-in-zambia
#4
Mwansa M Songe, Bernard M Hang'ombe, Theodore J D Knight-Jones, Delia Grace
Diarrhea is one of the most common diseases and is a leading cause of death in developing countries. This is often caused by contaminated food. Poor food hygiene standards are exacerbated by the presence of flies which can transmit a variety of infectious microorganisms, particularly through animal source foods. This fact becomes especially important in developing countries like Zambia, where fish is a highly valued source of protein. Our interest in this study was to identify if the flies that beset food markets in Zambia carry important pathogenic bacteria on their bodies, and subsequently if these bacteria carry resistance genes to commonly used antibiotics, which would indicate problems in eradicating these pathogens...
December 28, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27999066/public-health-risk-of-antimicrobial-resistance-transfer-from-companion-animals
#5
Constança Pomba, Merja Rantala, Christina Greko, Keith Edward Baptiste, Boudewijn Catry, Engeline van Duijkeren, Ana Mateus, Miguel A Moreno, Satu Pyörälä, Modestas Ružauskas, Pascal Sanders, Christopher Teale, E John Threlfall, Zoltan Kunsagi, Jordi Torren-Edo, Helen Jukes, Karolina Törneke
Antimicrobials are important tools for the therapy of infectious bacterial diseases in companion animals. Loss of efficacy of antimicrobial substances can seriously compromise animal health and welfare. A need for the development of new antimicrobials for the therapy of multiresistant infections, particularly those caused by Gram-negative bacteria, has been acknowledged in human medicine and a future corresponding need in veterinary medicine is expected. A unique aspect related to antimicrobial resistance and risk of resistance transfer in companion animals is their close contact with humans...
December 20, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27999050/complete-genetic-analysis-of-plasmids-carrying-mcr-1-and-other-resistance-genes-in-an-escherichia-coli-isolate-of-animal-origin
#6
Ruichao Li, Miaomiao Xie, Jingzhang Lv, Edward Wai-Chi Chan, Sheng Chen
OBJECTIVES: To investigate the genetic features of three plasmids recovered from an MCR-1 and ESBL-producing Escherichia coli strain, HYEC7, and characterize the transmission mechanism of mcr-1 METHODS: The genetic profiles of three plasmids were determined by PCR, S1-PFGE, Southern hybridization and WGS analysis. The ability of the mcr-1-bearing plasmid to undergo conjugation was also assessed. The mcr-1-bearing transposon Tn6330 was characterized by PCR and DNA sequencing. RESULTS: Complete sequences of three plasmids were obtained...
December 20, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27984780/high-rates-of-ctx-m-15-producing-escherichia-coli-and-klebsiella-pneumoniae-in-wild-boars-and-barbary-macaques-in-algeria
#7
Taous Bachiri, Sofiane Bakour, Rabia Ladjouzi, Leangapichart Thongpan, Jean Marc Rolain, Abdelaziz Touati
OBJECTIVES: The present study aimed to screen for the presence of extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae in wild boars and Barbary macaques in Béjaïa and Jijel, Algeria. METHODS: A total of 216 faecal samples collected between September 2014 and August 2015 were cultured on MacConkey agar supplemented with 1μg/mL ceftazidime. Isolates were identified by matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF/MS)...
December 10, 2016: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27973988/characterisation-of-extended-spectrum-%C3%AE-lactamase-and-ampc-%C3%AE-lactamase-producing-enterobacteriaceae-isolated-from-companion-animals-in-new-zealand
#8
A Karkaba, A Grinberg, J Benschop, E Pleydell
AIMS: To assess the occurrence of, and characterise, extended-spectrum-β-lactamase (ESBL) and AmpC-β-lactamase (AmpC)-producing Enterobacteriaceae isolated by veterinary diagnostic laboratories from infection sites in companion animals in New Zealand. METHODS: Selected Enterobacteriaceae isolates were submitted by seven New Zealand veterinary diagnostic laboratories. They were isolated from infection sites in companion animals between June 2012 and June 2013, and were resistant to amoxicillin-clavulanic acid, fluoroquinolones, or any combination of two or more antimicrobials...
December 14, 2016: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/27942365/isolation-antimicrobial-susceptibility-profile-and-detection-of-sul1-blatem-and-blashv-in-amoxicillin-clavulanate-resistant-bacteria-isolated-from-retail-sausages-in-kampar-malaysia
#9
Lih-Shin Tew, Li-Yen She, Choy-Hoong Chew
BACKGROUND: Due to the overuse of antibiotics in livestock as a growth-promoting agent, the emergence of multi-antibiotic resistant bacteria is becoming a concern. OBJECTIVES: In this study, we aimed to detect the presence and discover the molecular determinants of foodborne bacteria in retail sausages resistant towards the antibacterial agent amoxicillin-clavulanate. METHODS: Two grams of sausages were chopped into small pieces and transferred into sterile Luria-Bertani (LB) enrichment broths overnight before they were plated on MacConkey agar petri dishes...
October 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/27927087/multidrug-resistant-enterobacteriaceae-in-new-zealand-a-current-perspective
#10
L J Toombs-Ruane, J Benschop, S Burgess, P Priest, D R Murdoch, N P French
In this article we review mechanisms and potential transmission pathways of multidrug resistance in Enterobacteriaceae, with an emphasis on extended spectrum β-lactamase (ESBL)-production. This provides background to better understand challenges presented by this important group of antimicrobial resistant bacteria, and inform measures aimed at prevention and control of antimicrobial resistance in general. Humans and animals interact at various levels; household pets cohabit with humans, and other animals interact with people through direct contact, as well as through the food chain and the environment...
December 7, 2016: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/27899921/high-prevalence-of-%C3%AE-lactamase-and-plasmid-mediated-quinolone-resistance-genes-in-extended-spectrum-cephalosporin-resistant-escherichia-coli-from-dogs-in-shaanxi-china
#11
Xiaoqiang Liu, Haixia Liu, Yinqian Li, Caiju Hao
Objective: The aim of this study was to investigate the occurrence and molecular characterization of extended-spectrum β-lactamases (ESBL), plasmid-mediated AmpC β-lactamase (pAmpC) and carbapenemases as well as plasmid-mediated quinolone-resistant (PMQR) among extended-spectrum cephalosporin-resistant (ESC-R) Escherichia coli from dogs in Shaanxi province in China. Methods: A total of 40 ESC-R Escherichia coli selected from 165 Extraintestinal pathogenic E. coli (ExPEC) isolated from dogs were screened and characterized for the genes encoding for the ESBLs, pAmpC, carbapenemases and PMQR genes by PCR and sequencing...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27890366/in%C3%A2-vitro-biofilm-formation-in-esbl-producing-escherichia-coli-isolates-from-cage-birds
#12
Ebru Sebnem Yılmaz, Nur Ceyhan Güvensen
OBJECTIVE: To determine biofilm and hydrophobicity formation ratios in extended spectrum beta lactamases (ESBL) synthesizing Escherichia coli isolates which were isolated from feces samples of 150 cage bird species randomly taken from pet shops in Hatay province, Turkey. METHODS: In vitro biofilm production of 4 ESBL positive isolates were performed by Congo Red Agar (CRA), Standard Tube (ST) and Microtitre Plate (MP) methods while their hydrophobicity were examined by bacterial adhesion to hydrocarbon (BATH) test...
November 2016: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/27865491/prevalence-and-risk-factors-for-extended-spectrum-%C3%AE-lactamase-or-ampc-producing-escherichia-coli-in-organic-dairy-herds-in-the-netherlands
#13
I M G A Santman-Berends, M A Gonggrijp, J J Hage, A E Heuvelink, A Velthuis, T J G M Lam, G van Schaik
Extended-spectrum β-lactamase and AmpC-producing Escherichia coli (ESBL/AmpC) are an emerging problem and are hypothesized to be associated with antimicrobial use (AMU), and more specifically with the use of third- and fourth-generation cephalosporins. Whether ESBL/AmpC also occur in organic dairy herds, which have restricted AMU, is not known. Additionally, it is unknown whether, in addition to restricted AMU, other factors in organic herd management are associated with ESBL/AmpC herd status. The aim of this study was to estimate the prevalence of ESBL/AmpC in organic dairy herds in the Netherlands...
January 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/27815276/genome-dynamics-and-molecular-infection-epidemiology-of-multidrug-resistant-helicobacter-pullorum-isolates-obtained-from-broiler-and-free-range-chickens-in-india
#14
Shamsul Qumar, Mohammad Majid, Narender Kumar, Sumeet K Tiwari, Torsten Semmler, Savita Devi, Ramani Baddam, Arif Hussain, Sabiha Shaik, Niyaz Ahmed
: Some life-threatening, foodborne, and zoonotic infections are transmitted through poultry birds. Inappropriate and indiscriminate use of antimicrobials in the livestock industry has led to an increased prevalence of multidrug-resistant bacteria with epidemic potential. Here, we present a functional molecular epidemiological analysis entailing the phenotypic and whole-genome sequence-based characterization of 11 H. pullorum isolates from broiler and free-range chickens sampled from retail wet markets in Hyderabad City, India...
January 1, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27795309/extended-spectrum-beta-lactamase-and-plasmid-encoded-cephamycinase-producing-enterobacteria-in-the-broiler-hatchery-as-a-potential-mode-of-pseudo-vertical-transmission
#15
Michaela Projahn, Katrin Daehre, Uwe Roesler, Anika Friese
: Antimicrobial resistance through extended-spectrum beta-lactamases (ESBLs) and transferable (plasmid-encoded) cephamycinases (pAmpCs) represents an increasing problem in human and veterinary medicine. The presence of ESBL-/pAmpC-producing commensal enterobacteria in farm animals, such as broiler chickens, is considered one possible source of food contamination and could therefore also be relevant for human colonization. Studies on transmission routes along the broiler production chain showed that 1-day-old hatchlings are already affected...
January 1, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27773759/extended-spectrum-%C3%AE-lactamase-and-pampc-producing-enterobacteriaceae-among-the-general-population-in-a-livestock-dense-area
#16
C C H Wielders, A H A M van Hoek, P D Hengeveld, C Veenman, C M Dierikx, T P Zomer, L A M Smit, W van der Hoek, D J Heederik, S C de Greeff, C B M Maassen, E van Duijkeren
OBJECTIVES: In the Netherlands there is an ongoing debate regarding environmental health risks of livestock farming for neighbouring residents. This explorative study aims to determine the prevalence of carriage of ESBL/pAmpC-producing Enterobacteriaceae (ESBL/pAmpC-E) in the general population living in a livestock-dense area, and to study associations between determinants, including exposure through contact with animals and the environment, and human carriage of ESBL/pAmpC-E. METHODS: A cross-sectional study was performed among 2,432 adults (aged 20-72 years) in twelve temporary research centres in the south of the Netherlands, consisting of a questionnaire and analysis of a faecal sample to assess carriage of ESBL/pAmpC-E...
October 20, 2016: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/27733802/occurrence-and-characteristics-of-extended-spectrum-%C3%AE-lactamases-producing-escherichia-coli-in-foods-of-animal-origin-and-human-clinical-samples-in-chhattisgarh-india
#17
Bhoomika, Sanjay Shakya, Anil Patyal, Nitin Eknath Gade
AIM: To assess the prevalence of antimicrobial resistance producing extended-spectrum β-lactamases (ESBL) (blaTEM, blaSHV, and blaCTX-M) genes in Escherichia coli isolated from chicken meat, chevon meat, raw milk, and human urine and stool samples collected from tribal districts of Chhattisgarh, viz., Jagdalpur, Dantewada, Kondagaon, and Kanker. MATERIALS AND METHODS: A total of 330 samples, comprising 98 chicken meat, 82 chevon meat, 90 raw milk, and 60 human urine and stool samples, were processed for isolation of E...
September 2016: Veterinary World
https://www.readbyqxmd.com/read/27678285/antimicrobial-resistance-in-shiga-toxin-producing-escherichia-coli-serogroups-o157-and-o26-isolated-from-human-cases-of-diarrhoeal-disease-in-england-2015
#18
Martin Day, Michel Doumith, Claire Jenkins, Timothy J Dallman, Katie L Hopkins, Richard Elson, Gauri Godbole, Neil Woodford
OBJECTIVES: Shiga toxin-producing Escherichia coli (STEC) are zoonotic and transmission to humans occurs via contaminated food or contact with infected animals. In this study, WGS data were used to predict antimicrobial resistance (AMR) in STEC from symptomatic human cases to assess the extent of transmission of antibiotic-resistant E. coli from animals to humans. METHODS: WGS data from 430 isolates of STEC were mapped to genes known to be associated with phenotypic AMR...
January 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27660260/40-years-of-veterinary-papers-in-jac-what-have-we-learnt
#19
REVIEW
Stefan Schwarz, Virve I Enne, Engeline van Duijkeren
This review, for the occasion of the 40th anniversary of the Journal of Antimicrobial Chemotherapy (JAC), gives an overview of the manuscripts related to veterinary bacteriology published in the journal in the past 40 years with a focus on 'One Health' aspects. From 1975 to 2000 the number of manuscripts related to veterinary medicine was limited, but thereafter, the number steadily increased. Most manuscripts published were related to food-producing animals, but companion animals and minor species were also covered...
October 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27649798/increased-prevalence-of-antibiotic-resistant-e-coli-in-gulls-sampled-in-southcentral-alaska-is-associated-with-urban-environments
#20
Clara Atterby, Andrew M Ramey, Gabriel Gustafsson Hall, Josef Järhult, Stefan Börjesson, Jonas Bonnedahl
BACKGROUND: Antibiotic-resistant bacteria pose challenges to healthcare delivery systems globally; however, limited information is available regarding the prevalence and spread of such bacteria in the environment. The aim of this study was to compare the prevalence of antibiotic-resistant bacteria in large-bodied gulls (Larus spp.) at urban and remote locations in Southcentral Alaska to gain inference into the association between antibiotic resistance in wildlife and anthropogenically influenced habitats...
2016: Infection Ecology & Epidemiology
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