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This new book presents the latest research in environmental microbiology which is area of interaction that studies the interaction of microorganisms with the environment. It includes the structure, activities and communal behaviour of microbial communities, microbial interactions and interactions with plants, animals and non-living environmental factors, population biology and clonal structure microbes and surfaces, adhesion and biofouling responses to environmental signals and stress factors growth and survival, modelling and theory development, microbial community genetics and evolutionary processes, microbial physiological, metabolic and structural diversity, pollution microbiology, extremophiles and life in extreme and unusual little-explored habitats, primary and secondary production, element cycles and biogeochemical processes and microbially-influenced global changes.
Materials and equipment in food processing industries are colonized by surface-associated microbial communities called biofilms. In these biostructures microorganisms are embedded in a complex organic matrix composed essentially of polysaccharides, nucleic acids and proteins. This organic shield contributes to the mechanical biofilm cohesion and triggers tolerance to environmental stresses such as dehydratation or nutrient deprivation. Notably, cells within a biofilm are more tolerant to sanitation processes and the action of antimicrobial agents than their free living (or planktonic) counterparts. Such properties make conventional cleaning and disinfection protocols normally not effective i...
Campylobacter spp and Helicobacter spp are gastrointestinal pathogens that remain a major cause of acute gastroenteritis and gastric disease, respectively. The 16th International Workshop on Campylobacter, Helicobacter and Related Organisms (CHRO) will be held in Vancouver, British Columbia Canada from August 28-September 1, 2011 and will highlight recent advances in our understanding of the epidemiology, survival mechanisms, host response and pathogenesis of these important species. This Research Topic issue will highlight each of these topics and will attempt to shed insight into our growing understanding of the process of host-pathogen interactions as it relates to Campylobacter and Helicobacter.
Members of the genus Staphylococcus and Streptococcus are the causative agnets of many human and animal diseases. Over the past decade the complete sequencing of many staphylococcal and streptococcal genomes has promoted a significant advance in our knowledge of these important pathogens. The pathogenicity of these bacteria is due to the expression of a large variety of virulence factors. Such determinants, which are cell wall-associated and secreted proteins, include adhesins that confer to the pathogen the ability to attach to extracellular matrix/plasma and host cell surfaces, proteins that contribute to host cell invasion and intracellular survival and soluble factors that decrease phago...
Food Safety: Contaminants and Risk Assessment is a state-of-art reference on food safety, which is the biggest challenge in the food supply chains worldwide. Despite advancements in hygiene, food treatment, and food processing, foodborne pathogens or food contaminants still represent a significant threat to human health. This book presents comprehensive information about the major food contaminants across food types. The text provides facts about setting up food safety initiatives and safety rules, foodborne pathogen detection, production and processing compliance issues, and safety education. Key Features Examines a diverse range of contaminants across food types Describes various food allergens and allergies Discusses contamination in drinking water and bottled water Reviews the international regulations for management of food hazards Throws light on the overall impact of food safety of global food supply chains This book is meant for postgraduate students, researchers, and food industry professionals.
The ingestion of food containing pathogenic microorganisms (i.e. bacteria and their toxins, fungi, viruses) and parasites can cause food-borne diseases in humans. A growing number of emerging pathogens, changes of virulence of known pathogens and appearance of antibiotic resistance has recently exposed consumers to a major risk of illness. Also infected people and the environment can spread microorganisms on raw or processed food. Outbreaks of food-borne diseases are often unrecognized, unreported, or not investigated and particularly in developing countries their agents and sources are mostly unknown. Surveillance and analytical methods aiming at their detection are to be hoped, as well as good strategies to struggle against these threats. This E-book is subdivided in chapters regarding to pathogenic and spoiling microorganisms, chemical hazards produced by biological agents and food safety management systems.
Throughout the food processing chain and after ingestion by the host, food associated bacteria have to cope with a range of stress factors such as thermal and/or non-thermal inactivation treatments, refrigeration temperatures, freeze-drying, high osmolarity, acid pH in the stomach or presence of bile salts in the intestine, that threaten bacterial survival. The accompanying plethora of microbial response and adaptation phenomena elicited by these stresses has important implications for food technology and safety. Indeed, while resistance development of pathogenic and spoilage microorganisms may impose health risks for the consumer and impart great economic losses to food industries, reduced ...