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  • 1
    Online Resource
    Online Resource
    Norfolk :Caister Academic Press,
    Keywords: Campylobacter. ; Campylobacter-Ecology. ; Campylobacter-Evolution. ; Electronic books.
    Description / Table of Contents: In this book, internationally recognised experts critically review and provide novel insights into important aspects Campylobacter research. The book is divided into four sections: Mechanisms of evolution; Adaptations to host colonisation; Molecular epidemiology; and Ecology in poultry. The topics covered range from the mechanisms of evolution through the processes of host colonisation and within host adaptation, and epidemiology to considerations of their broader biochemical and ecological properties. An important resource summarising our current knowledge of Campylobacter ecology and evolution, this book is essential reading for all researchers working with Campylobacter and related organisms.
    Type of Medium: Online Resource
    Pages: 1 online resource (377 pages)
    Edition: 1st ed.
    ISBN: 9781908230980
    DDC: 616.0145
    Language: English
    Note: Intro -- Contents -- Current books of interest -- Contributors -- Foreword -- Preface -- Part I: Mechanisms of Evolution -- 1: A Candidate Hopeful Monster in the Genus Campylobacter -- Introduction -- Hybridization by horizontal gene transfer -- 2: Learning About Recombination in Campylobacter -- Introduction -- Estimating recombination from population data -- Estimating recombination from closely related isolates -- Discussion -- 3: Within-host Evolution of Campylobacter jejuni -- Introduction -- Phenotypic changes of Campylobacter jejuni after host passage -- Genotypic changes of Campylobacter jejuni during host passage -- Conclusions -- Future studies -- 4: Concerted Evolution in Campylobacter jejuni and Campylobacter coli -- Concerted evolution -- Duplicated genes in Campylobacter -- Unresolved questions -- 5: Genome and Transcriptome Evolution in the Genus Campylobacter -- Introduction -- Characteristics of Campylobacter genome sequences -- Transcriptome evolution in the genus Campylobacter -- Conclusions -- 6: Repetitive DNA: A Major Source of Genetic Diversity in Campylobacter Populations? -- Introduction -- Types, prevalence and mutability of SSRs in Campylobacter genomes -- Variation in SSRs has functionally important phenotypic effects -- Combinatorial consequences of multiple phase-variable genes -- Influence of mutational, selective and population forces on the diversity of phase-variable genotypes -- Modelling phase-variable genes and selection for mutational rates -- Experimental issues connected with phase variation -- Summary -- Future perspectives -- Part II: Adaptations to Host Colonization -- 7: Campylobacter Strategies for Colonizing the Host Gastrointestinal Tract -- Introduction -- Carbon sources utilized by Campylobacter to support growth in vivo -- Mucins and the mucous layer -- Conclusions and future trends. , 8: The Intricate Relationship Between Campylobacter and Mucus -- The stucture and function of intestinal mucus -- The ecology of C. jejuni in intestinal mucus -- Mucus as a source of glycans -- Campylobacter jejuni commensalism in chickens -- Conclusions and future directions -- 9: Campylobacter Association with the Human Host -- Introduction -- Adhesion, invasion and translocation -- Bacterial factors influencing adhesion and invasion of C. jejuni -- Do all campylobacters invade to the same extent? -- Conclusion -- 10: Siderophore-mediated Iron Acquisition for Campylobacter Infection -- Introduction -- Iron sources in the intestine: an ecological view -- Enterobactin-mediated iron acquisition -- Salmochelin-mediated iron acquisition -- Hydroxamate siderophore-mediated iron acquisition -- Conclusion and future directions -- 11: Genetic Mechanisms Involved in Campylobacter jejuni Survival Under Oxidative Stress Conditions -- The C. jejuni survival conundrum -- Oxidative stress overview -- C. jejuni mechanisms for countering oxidative stress -- Oxidative stress regulation in C. jejuni -- Discussion and future perspectives -- 12: Oxidative Stress Survival During Campylobacter Transmission and Infection -- Campylobacter jejuni transmission and aerotolerance -- Reactive oxygen species -- Aerobic stress effector proteins -- Regulation of aerobic stress responses -- Oxidative stress responses during transmission of C. jejuni -- Oxidative stress and transmission of C. jejuni in an avian host -- Oxidative stress survival of C. jejuni outside the host -- Oxidative stress survival during infection -- Conclusions and future trends -- 13: The Role of the Flagellum in Campylobacter jejuni Colonization and Disease -- Introduction -- C. jejuni-mediated enteritis -- Flagellar structure and gene expression. , The role of flagellum in adherence and invasion of host cells -- C. jejuni engages in a novel synthetic response when cultured with epithelial cells leading to protein secretion -- Identification of genes encoding the Cia virulence proteins -- Identification and characterization of the Cia proteins -- Putative roles of the Cia proteins -- Evidence that the C. jejuni flagellum is necessary for protein export -- The C. jejuni flagellar export apparatus is necessary for Cia protein delivery to host cells -- Mechanism of flagellar effector secretion and delivery -- Identification of additional non-flagellar proteins exported from the flagellum -- Biofilm formation is dependent on flagellum -- Conclusions and future perspectives -- 14: Does Biofilm Formation Aid Colonization and Infection in Campylobacter? -- Introduction -- Attachment and adhesins -- Role of flagella and motility in adhesion and invasion -- Effect of oxygen on biofilm formation -- Phase switching in biofilm formation -- Environmental phosphate -- Campylobacter planktonic growth regulation complex (CprRS) -- Concluding remarks -- 15: Alternative Infection Models for Campylobacter jejuni -- Introduction -- In vitro cultured cell infection models -- Human cell lines -- Non-human cell lines -- In vivo alternative infection models -- Zebra fish embryo as a model for Campylobacter studies -- Campylobacter metabolism and host adaptation -- Part III: Molecular Epidemiology -- 16: Exploring the Population Dynamics of Multiple Campylobacter Strains in Poultry -- Introduction -- Multiple carriage of Campylobacter strains within flocks -- Multiple carriage of Campylobacter strains amongst individual birds -- Multiple carriage of Campylobacter strains and implications for sampling -- Future directions -- Conclusion -- 17: Evolution of Campylobacter Species in New Zealand. , History of New Zealand, including domestic and wild animal introductions, from pre-human to post European colonization -- Theoretical effect of isolation and introduction on the population of Campylobacter spp. -- Molecular epidemiology of human campylobacteriosis in New Zealand -- Study 1: population genetics of Campylobacter spp. isolated from native non-migratory wild bird species in New Zealand -- Study 2: population structure of Campylobacter jejuni in New Zealand compared with the UK -- Study 3: The evolution of ST-474: New Zealand's most important public health-related sequence type -- Conclusion -- 18: How Molecular Typing has Changed our Understanding on Sources and Transmission Routes of Campylobacteriosis in Finland -- Introduction -- Epidemiology of campylobacteriosis in Finland -- Poultry as a source of domestically acquired infections in Finland -- Cattle as a source of domestically acquired infections in Finland -- Population structure of isolates -- Water as a source of domestically acquired infections in Finland -- Genetic markers -- 19: Extensive Spatial and Temporal Clustering of Campylobacter Infections -- Introduction -- Materials and methods -- Results -- Discussion -- 20: Ecology and Host Associations of Campylobacter in Wild Birds -- Poultry and Campylobacter -- C. jejuni occurrence in wild birds -- Epidemiological studies of wild bird campylobacters -- Concluding remarks -- Part IV: Ecology in Poultry -- 21: Epidemiology and Control of Campylobacter in Modern Broiler Production -- Introduction -- Commercial broiler production, a brief description -- Colonization of broiler flocks by Campylobacter -- Within-flock transmission -- Sources, vehicles and routes of infection -- Risk factor analysis studies -- Transportation and holding -- Slaughter and processing -- Mitigation measures at different stages of broiler production. , Campylobacter prevalence and monitoring -- Detection challenges -- Future trends -- 22: Conditional Commensalism of Campylobacter in Chickens -- Colonization of the host -- Invasive behaviour in poultry -- Colonization invokes an immune response -- Disease -- Host susceptibility to disease -- Conclusions -- 23: The Chicken Reservoir and Specific Alleles at Conserved Contingency Loci Can Promote Host Colonization and Disease by Campylobacter jejuni -- Introduction -- Summary of recent studies in our laboratory -- Discussion -- Focus of future work -- Conclusions -- 24: The Long Road Ahead: Unravelling the Immune Response to Campylobacter in the Chicken -- Introduction -- The chicken immune system -- The innate immune response to Campylobacter -- Adaptive immunity to Campylobacter -- Regulation of the immune response -- Vaccination to control Campylobacter -- Genetic resistance - selective breeding towards Campylobacter control -- Conclusions -- Future trends - the long road ahead -- Index.
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  • 2
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Temporal temperature gradient electrophoresis (TTGE) analysis of 16S rRNA gene fragments amplified with primers selective for eubacteria and β-proteobacterial ammonia-oxidising bacteria (AOB) was used to analyse changes in bacterial and AOB community profiles of an upland pasture following soil improvement treatments (addition of sewage sludge and/or lime). Community structure was compared with changes in activity assessed by laboratory measurements of basal respiration and ammonia oxidation potentials, and with measurements of treatment- and time-related changes in soil characteristics. The predominant bacterial populations had a high degree of similarity under all treatment regimens, which was most pronounced early in the growing season. Most of the differences that occurred between soil samples with time could be accounted for by spatial and temporal variation; however, analysis of variance and cluster analysis of similarities between 16S rDNA TTGE profiles indicated that soil improvement treatments exerted some effect on community structure. Lime application had the greatest influence. The impact of soil improvement treatments on autotrophic ammonia oxidation was significant and sustained, especially in soils which had received sewage sludge and lime treatments in combination. However, despite obvious changes in soil characteristics, e.g. pH and soil nitrogen, increasing heterogeneity in the AOB community structure over time obscured the treatment effects observed at the beginning of the experiment. Nevertheless, time series analysis of AOB TTGE profiles indicated that the AOB community in improved soils was more dynamic than in control soils where populations were found to be relatively stable. These observations suggest that the AOB populations exhibited a degree of functional redundancy.
    Type of Medium: Electronic Resource
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