Salmonella enterica Serovar Typhimurium and Escherichia coli Survival in Estuarine Bank Sediments

摘要: Estuarine bank sediments have the potential to support survival and growth of fecal indicator organisms, including Escherichia coli. However, pathogens in estuarine is not well researched therefore remains a significant knowledge gap regarding public health risks estuaries. In this study, simultaneous coli pathogen, Salmonella enterica serovar Typhimurium, was studied for 21 days sediment microcosms. Observed patterns both organisms were comparable under four simulated scenarios; continuous-desiccation, extended-desiccation, periodic-inundation, continuous-inundation systems, logarithmic decay coefficients 1.54/day, 1.51/day, 0.14/day, 0.20/day, respectively, E. coli, 1.72/day, 1.64/day, 0.21/day, 0.24/day S. Typhimurium. Re-wetting continuous-desiccated systems resulted re-growth, suggesting moisture-limited conditions. Key findings from study include: (i) Bank can potentially human (S. Typhimurium), (ii) inundation levels influence bacteria sediments, (iii) rates Typhimurium implies latter could be reliable urban The results will help select suitable monitoring management strategies safer recreational activities