Enterococcus And Safety
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Enterococcus And Safety
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Author : Teresa Semedo-Lemsaddek
language : en
Publisher: Nova Science Publishers
Release Date : 2012
Enterococcus And Safety written by Teresa Semedo-Lemsaddek and has been published by Nova Science Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Enterococcal infections categories.
The book "Enterococcus and Safety" is presented as a journey to the enterococcal world. The genus Enterococcus comprises a wide variety of both pathogenic and commensal gram-positive bacteria. These micro-organisms are common constituents of fermented products such as traditionally manufactured cheeses and dry sausages, in which it is believed that they contribute to the development of organoleptic characteristics. In addition, enterococci are also used to extend the shelf life and improve the hygienic safety of foodstuffs because they produce bacteriocins which may have a promising potential in bio-preservation and in the enhancement of the hygienic quality of food products. However, in recent years enterococci have emerged as serious pathogens in hospital environments, where vancomycin-resistant strains are gaining major importance. This dual role of enterococci as beneficial organisms or opportunistic pathogens leads to an increasing need for studies intended to discriminate between food-grade and pathogenic strains.
Enterococcus And Safety
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Author : Teresa Semedo-Lemsaddek
language : en
Publisher: Nova Science Publishers
Release Date : 2012-05-01
Enterococcus And Safety written by Teresa Semedo-Lemsaddek and has been published by Nova Science Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-01 with Technology & Engineering categories.
The book "Enterococcus and Safety" is presented as a journey to the enterococcal world. The genus Enterococcus comprises a wide variety of both pathogenic and commensal gram-positive bacteria. These micro-organisms are common constituents of fermented products such as traditionally manufactured cheeses and dry sausages, in which it is believed that they contribute to the development of organoleptic characteristics. In addition, enterococci are also used to extend the shelf life and improve the hygienic safety of foodstuffs because they produce bacteriocins which may have a promising potential in bio-preservation and in the enhancement of the hygienic quality of food products. However, in recent years enterococci have emerged as serious pathogens in hospital environments, where vancomycin-resistant strains are gaining major importance. This dual role of enterococci as beneficial organisms or opportunistic pathogens leads to an increasing need for studies intended to discriminate between food-grade and pathogenic strains.
Enterococci In Food Fermentations
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Author : T. M. Cogan
language : en
Publisher:
Release Date : 2001-01-01
Enterococci In Food Fermentations written by T. M. Cogan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-01-01 with Cheese categories.
Enterococci In Foods
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Author : Wilhelm Holzapfel
language : en
Publisher:
Release Date : 2003
Enterococci In Foods written by Wilhelm Holzapfel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Safety Of Enterococcus Faecium Nrrl B 2354 And Enterococcus Faecalis Atcc 29212 For Use As Surrogate Organisms In The Thermal Processing Of Dry Foods
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Author : Lauren Michelle Kopit
language : en
Publisher:
Release Date : 2013
Safety Of Enterococcus Faecium Nrrl B 2354 And Enterococcus Faecalis Atcc 29212 For Use As Surrogate Organisms In The Thermal Processing Of Dry Foods written by Lauren Michelle Kopit and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Enterococcus species are lactic acid bacteria that are commensal residents of plants and mammalian gastrointestinal tracts and are involved in the production of fermented foods. Over the last thirty years, however, Enterococcus faecalis and Enterococcus faecium have become increasingly associated with infections among immunocompromised and hospitalized patients. Enterococcal infections are not well understood, but virulence factors have been identified and linked to pathogenicity. Enterococcus faecium strain NRRL B-2354 has long been used by the food industry as a starter culture and as a surrogate organism in the validation of thermal processing methods. E. faecalis ATCC 29212 is a clinically isolated strain often used for species identification and as a reference for antibiotic sensitivity testing. The purpose of this study was to evaluate the safety of E. faecium NRRL B-2354 and E. faecalis ATCC 29212 on both a genotypic and a phenotypic basis. The genomes of these strains were sequenced, assembled, and annotated. E. faecium NRRL B-2354 was found to either lack or contain non-functional copies of a number of E. faecium virulence genes, was negative for gelatinase, hemolysin, and pilus production, and was unable to adhere to extracellular matrix proteins and unable to form biofilms on polystyrene. E. faecalis ATCC 29212 was found to either lack or contain non-functional copies of E. faecalis virulence genes agg, esp, and the fsr operon, but the presence of ace, cyl, ebp, gelE, salB, and sprE was confirmed. E. faecalis ATCC 29212 was negative for gelatinase production but positive for hemolytic activity, and was unable to adhere to collagen or fibronectin but could bind to fibrinogen. Compared with hospital-associated strains, E. faecium NRRL B-2354 was less sensitive to acid pH (pH 2.4) and high temperatures (60 °C) and was able to grow in 8% ethanol. E. faecalis ATCC 29212 was sensitive to high temperatures (60 °C) and was unable to grow in 8% ethanol. Finally, E. faecium NRRL B-2354 was found to be sensitive to medically-relevant antibiotics, while E. faecalis ATCC 29212 was found to be sensitive to medically-relevant antibiotics including vancomycin, ampicillin, gentamycin, and streptomycin, but was resistant to tetracycline and two different cephalosporins. These data suggest that E. faecium NRRL B-2354 is genetically and phenotypically distinct from clinical strains of E. faecium and hence is suitable for continued use as a surrogate organism by the food industry. Although E. faecalis ATCC 29212 has not been associated with infection, this strain contains genetic and phenotypic determinants that indicate it is unsuitable for use in process testing of food products intended for human consumption.
Guidance Of The Feedap Panel
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Author : European Food Safety Authority
language : en
Publisher:
Release Date : 2013
Guidance Of The Feedap Panel written by European Food Safety Authority and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
"This Guidance document is intended to provide a method to identify Enterococcus faecium strains belonging to a sub-population of bacteria isolated from clinical specimens. Differentiation is based on susceptibility to ampicillin and the absence of three genetic markers associated with the clinical isolates. In the view of the FEEDAP Panel any strain of E. faecium demonstrating a resistance to ampicillin greater than 2 mg/L or possessing any of the three marker genes should not be used as a feed additive."--Editor.
Safety Evaluation And Probiotic Potential Of Bacteriocinogenic Strains Of Enterococcus Faecium
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Author : Arun Bhardwaj
language : en
Publisher:
Release Date : 2009
Safety Evaluation And Probiotic Potential Of Bacteriocinogenic Strains Of Enterococcus Faecium written by Arun Bhardwaj and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Principles And Practice Of Clinical Bacteriology
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Author : Stephen Gillespie
language : en
Publisher: John Wiley & Sons
Release Date : 2006-05-12
Principles And Practice Of Clinical Bacteriology written by Stephen Gillespie and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-05-12 with Medical categories.
Since the publication of the last edition of Principles and Practice of Clinical Bacteriology, our understanding of bacterial genetics and pathogenicity has been transformed due to the availability of whole genome sequences and new technologies such as proteomics and transcriptomics. The present, completely revised second edition of this greatly valued work has been developed to integrate this new knowledge in a clinically relevant manner. Principles and Practice of Clinical Bacteriology, Second Edition, provides the reader with invaluable information on the parasitology, pathogenesis, epidemiology and treatment strategies for each pathogen while offering a succinct outline of the best current methods for diagnosis of human bacterial diseases. With contributions from an international team of experts in the field, this book is an invaluable reference work for all clinical microbiologists, infectious disease physicians, public health physicians and trainees within these disciplines.
Antimicrobial Resistance And Food Safety
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Author : Chin-Yi Chen
language : en
Publisher: Elsevier
Release Date : 2015-04-15
Antimicrobial Resistance And Food Safety written by Chin-Yi Chen and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-04-15 with Technology & Engineering categories.
Antimicrobial Resistance and Food Safety: Methods and Techniques introduces antimicrobial resistant food-borne pathogens, their surveillance and epidemiology, emerging resistance and resistant pathogens. This analysis is followed by a systematic presentation of currently applied methodology and technology, including advanced technologies for detection, intervention, and information technologies. This reference can be used as a practical guide for scientists, food engineers, and regulatory personnel as well as students in food safety, food microbiology, or food science. Includes analysis of all major pathogens of concern Provides many case studies and examples of fundamental research findings Presents recent advances in methodologies and analytical software Demonstrates risk assessment using information technologies in foodborne pathogens
The Enterococci
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Author : Michael S. Gilmore
language : en
Publisher:
Release Date : 2002
The Enterococci written by Michael S. Gilmore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Drug resistance in microorganisms categories.
This text provides comprehensive coverage of the latest research on enterococci.