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Dr. van Bruggen carried out fundamental and applied research on ecosystem health in relation to the invasion by plant and human pathogens. A healthy ecosystem is characterized by a dynamically balanced and diverse community of organisms, stability and resilience after disturbances, minimal losses of nutrients and energy, and sporadic outbreaks of pests and diseases. We hypothesized that the extent of oligotrophy, in terms of easily available carbon sources and mineral nutrients, largely determines the health status of an ecosystem. This concept was developed based on research results on the survival and spread of enteric human pathogens (Escherichia coli O157:H7 and Salmonella enterica) from manure to soil, water and plants. A probabilistic risk model was developed for the contamination of a lettuce crop by manure, soil, and water contaminated with E. coli O157:H7. Internalization of Salmonella enterica serovar Typhmurium in tomato leaves, stems and fruits was shown to occur from contaminated water and aerosols. Simulation models were developed for the survival of E. coli O157:H7 and Salmonella Typhimurium in manure, manure-amended soil and water.
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Elsevier eBookspp.680-690, (2023)
Plant Diseases and Food Security in the 21st CenturyPlant Pathology in the 21st Centurypp.161-191, (2021)
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