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  • Nature America Inc.  (1)
  • San Diego :Elsevier Science & Technology,  (1)
  • Springer  (1)
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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Drug resistance in microorganisms. ; Pathogenic microorganisms. ; Foodborne diseases -- Microbiology. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (457 pages)
    Edition: 1st ed.
    ISBN: 9780128013373
    Language: English
    Note: Front Cover -- Antimicrobial Resistance and Food Safety -- Copyright Page -- Contents -- List of Contributors -- 1 Introduction to Antimicrobial-Resistant Foodborne Pathogens -- How Antimicrobial Resistance Is Defined? -- How Does Resistance Spread Between Ecosystems? -- Conclusion -- References -- 2 Antimicrobial Resistance of Shiga Toxin-Producing Escherichia coli -- Introduction -- Shiga Toxin-Producing E. coli and Enterohemorrhagic E. coli -- Antibiotic and Antimicrobial Use During Food Production and Processing -- Resistance of E. coli O157:H7 to Antibiotics -- Antibiotic Resistance and Mobile DNA Elements -- Antibiotic Resistance Gene Dissemination -- Resistance to Antibiotics as Affected by Biocide Use and Bile Exposure -- Resistance of E. coli O157:H7 and Other STEC to Antimicrobial Interventions -- Resistance to Oxidative Stress -- Resistance to Osmotic Stress -- Resistance to Acidic Stress -- Effect of Repeated Exposure and Pro-Adaptation on Resistance -- Heat Susceptibility as Affected by Adaptive Treatment -- Resistance of E. coli O157:H7 as Affected by Its Physiological State -- Influence of Extracellular Polysaccharide Production and Biofilm Formation on Resistance -- Conclusion -- References -- 3 Antibiotic Resistance in Pathogenic Salmonella -- Introduction -- Salmonella spp. as a Pathogen -- Salmonella Characteristics -- Salmonella Classification -- Pathogenesis of Salmonella -- Salmonellosis -- Pathogenic Mechanisms -- Salmonella and Antibiotics -- General Concepts -- Salmonellosis and Clinical Antibiotic Treatment -- Mechanisms of Antimicrobial Action -- Salmonella MDR Strains -- Factors that Influence Salmonella Antibiotic Resistance -- Conclusions -- References -- 4 Antimicrobial Resistance and Campylobacter jejuni and C. coli -- Introduction -- Resistance Mechanisms -- Fluoroquinolones -- Macrolides -- Tetracyclines. , Aminoglycosides -- β-Lactam Group of Antimicrobials -- Development of Resistance -- Genetic Adaptive Mechanisms in Resistant Bacteria -- Consequences of Resistance on Bacterial Fitness -- Resistance Detection -- Genetic Methods in the Detection of Resistance Determining Targets -- Genomic Analysis of Resistance -- Clinical Breakpoints and Epidemiological Cut-Off Values -- Resistance Levels in Different Countries and Sources -- References -- 5 Antimicrobial Resistance in Yersinia enterocolitica -- Introduction -- Human Infections -- Diagnosis -- Treatment -- Epidemiology -- Virulence Factors -- Antimicrobial SUSCEPTIBILITY -- Mechanisms of Antimicrobial Resistance -- Mechanisms of Resistance to β-lactams -- Mechanisms of Resistance to Aminoglycosides -- Mechanisms of Resistance to Quinolones -- Concluding Remarks -- References -- 6 Antimicrobial Resistance in Vibrio Species -- Introduction -- Epidemiology and Underreporting -- Vibrio vulnificus -- Vibrio parahaemolyticus -- Data Limitations and Emerging Methods for Assessing Antibiotic Resistance -- Conclusions -- References -- 7 Antimicrobial Resistance in Shigella Species -- Introduction -- Antibiotic Resistance -- North America -- South America -- Europe -- Africa -- Asia -- Final Thoughts -- References -- 8 Antimicrobial Resistance in Listeria spp. -- Introduction -- Mechanisms of Antibiotic Resistance -- Innate Resistance -- Transferable and Acquired Antimicrobial Resistance -- Relationship of Antimicrobial Resistance to Virulence -- Virulence Genes' Effects on Antimicrobial Susceptibility -- Selection for Resistant Phenotypes -- Relevance to Food Safety and Public Health -- Conclusions -- Acknowledgments -- References -- 9 Antibiotic Resistance in Enterococci: A Food Safety Perspective -- General Introduction -- Taxonomy and Characteristics -- Status as Probiotics -- Clinical Status. , Human Infections -- Animal Infections -- Food Animals as a Reservoir of Antibiotic-Resistant Strains -- Farm Environment and Antibiotic-Resistant Strains -- Status as Food Contaminants -- Sharing of Enterococcal Strains Among Food Animals, Food, and Humans -- Other Important Links -- Concluding Remarks -- References -- 10 Clostridium difficile: A Food Safety Concern? -- Introduction -- Pathogenesis -- Toxins -- The Spore -- Risk Factors -- The Microbiome -- Therapy -- Epidemiology -- Molecular Genotyping -- Emergence of a Drug-Resistant Epidemic Clone -- Asymptomatic Carriage -- Community-Associated Disease -- Food Animals and Food -- PCR Ribotype 078 -- Swine -- Cattle -- Poultry -- Meat Processing Facilities -- Retail Foods -- Farm Environment and Waste Management Practices -- Antibiotic Resistance -- Conclusions -- References -- 11 Methods for the Detection of Antimicrobial Resistance and the Characterization of Staphylococcus aureus Isolates ... -- Introduction -- Detection and Analysis of Antimicrobial Resistance in S. aureus -- AST of S. aureus -- Diffusion Methods -- Dilution Methods -- Specific Phenotypic Tests for S. aureus -- Genotypic Detection of Antimicrobial Resistance -- PCR Assays for Resistance Genes -- DNA Microarray for the Detection of Resistance Genes -- Typing of S. aureus -- Genotypic Typing Methods -- Sequence-Based Typing Methods -- PCR-Based Typing Methods -- Pattern-Based Typing Methods -- Phenotypic Typing Methods -- Typing by DNA Microarray -- Detection of Virulence Genes in S. AUREUS -- PCR Assays for Virulence Genes -- Detection of Virulence Genes by DNA Microarray -- Examples for the Complex Characterization of S. AUREUS from Food-Producing Animals and Food of Animal Sources -- Conclusions -- Acknowledgments -- References. , 12 Non-Phenotypic Tests to Detect and Characterize Antibiotic Resistance Mechanisms in Enterobacteriaceae -- Endpoint PCRs -- Commercially Available Multiplex PCRs -- Advantage and Disadvantages of PCRs -- Real-Time PCRs -- Commercially Available Real-Time PCRs -- Implementation of Real-Time PCRs -- Advantages and Disadvantages of Real-Time PCR -- Microarray -- Commercially Available Microarrays -- Clinical Implementation of the Microarrays -- Advantages and Disadvantages of Microarrays -- Next-Generation DNA-Sequencing Methodologies -- Mass Spectrometry-Based Methodologies -- MALDI-TOF MS -- Advantages and Disadvantages of MALDI-TOF MS -- PCR/ESI MS -- Advantages and Disadvantages of PCR/ESI MS -- Conclusions -- References -- 13 Monitoring and Surveillance: The National Antimicrobial Resistance Monitoring System -- Introduction -- NARMS Overview -- Drug Selection and Breakpoints Used -- Current Testing Methods -- The Evolution of NARMS -- Sampling -- Human Sampling -- Animal Sampling -- Retail Meat Sampling -- Laboratory Methods -- Data Acquisition and Reporting -- International Harmonization -- NARMS in Action-Public Health Impact -- Risk Assessment -- NARMS Data and the Development of Regulatory Policy -- NARMS Data and Outbreak Detection and Response -- Strengths and Limitations -- Conclusion -- References -- 14 Risk Assessment of Antimicrobial Resistance -- Introduction -- Risk Assessment -- The Initiation of a Risk Assessment -- Antimicrobial Resistance Risk Assessment -- Hazard Identification -- Dose-Response Assessment -- Exposure Assessment -- Risk Characterization -- Mathematical and Other Risk Analytical Approaches -- Fitting Antimicrobial Resistance Risk Assessment into Public Health Risk Management -- Acknowledgment -- References -- 15 Food Microbial Safety and Animal Antibiotics -- Introduction -- Methods of QRA. , Farm-to-Fork Risk Simulation Model -- Dose-Response Models for Foodborne Pathogens -- Quantitative Risk Characterization for QMRA and Risk Management -- Attribution-Based Risk Assessment and Controversies -- Empirical Upper-Bounding -- Case Study: AREF Bacteria -- Summary of Results from Applying Empirical Upper-Bounding Risk Assessment to Other Antibiotic-Resistant Bacteria -- Managing Uncertain Food Risks via Quality Principles: HACCP -- Discussion and Conclusions -- References -- 16 Antibiotic-Resistant Bacteria and Resistance Genes in the Water-Food Nexus of the Agricultural Environment -- Introduction -- Methods to Determine Antibiotic-Resistant Bacteria and Resistance Genes -- Standardized Method to Assess Antimicrobial Resistance or Susceptibility -- Quantitative Polymerase Chain Reaction -- Past Monitoring Surveys-Detailing the Knowledge Gaps -- Impact on Soils, Crops, and Health -- Impact on Agricultural Soils -- Impact on Agricultural Crops -- Impact on Occupational and Public Health -- Quantitative Microbial Risk Assessment -- Hazard Identification -- Exposure Assessment -- Dose-Response -- Risk Characterization -- Technological Solutions -- Chlorine and UV Disinfection -- Anaerobic Membrane Bioreactor as a Decentralized Treatment Technology -- Conclusions -- References -- 17 Development and Application of Novel Antimicrobials in Food and Food Processing -- Introduction-Why Novel Antimicrobials Are Needed -- Essential Oils -- Chitosan -- Antimicrobial Peptides -- Bacteriophage -- Natural Antimicrobial Combinations -- Synergistic Activity of Novel Antimicrobials and Novel Technology -- Considerations When Selecting Novel Antimicrobials -- Conclusion and Future Trends -- References -- 18 Database Resources Dedicated to Antimicrobial Peptides -- Introduction -- General Databases for AMPs -- Antimicrobial Sequence Database. , Antimicrobial Peptide Database.
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature America Inc.
    Nature genetics 19 (1998), S. 375-378 
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The initiation of DNA replication involves a minimum of four factors: a specific DNA sequence (origin), an initiator protein which binds to the origin, a helicase that unwinds the origin and a protein that binds single-stranded DNA that stabilizes the unwound origin. In eukaryotic cells, the ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 230 (1991), S. 302-309 
    ISSN: 1617-4623
    Keywords: VirG ; Agrobacterium ; vir activation ; Supervirulence ; pTiBo542
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The virG gene of the Agrobacterium tumefaciens Ti plasmid pTiBo542 has previously been reported to elicit stronger vir gene expression than its counterpart in the pTiA6 plasmid, a property we call the “superactivator” phenotype. The DNA sequence of the pTiBo542 virG gene was determined and compared to that of the pTiA6 gene. The DNA sequences of these genes differ at 16 positions: two differences are in the promoter regions, 12 are in the coding regions, and two are in the 3′ untranslated regions. The 3′ end of the pTiA6 virG gene also contains a probable insertion sequence that is not found downstream of the pTiBo542 gene. The base pair differences in the two coding regions result in only two amino acid differences, both in the amino-terminal halves of the proteins. Five hybrid virG genes were constructed and used to activate the expression of a virB::lacZ gene fusion. Differences in the coding regions of these genes accounted for most of the superactivator phenotype, while differences at the promoter and 3′ untranslated regions also contributed. These findings suggest that the properties of these VirG proteins and their quantities are important for vir gene induction, and also suggest a long-term selective pressure for mutations contributing to differences between these two genes.
    Type of Medium: Electronic Resource
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