Occurrence of virulence and antimicrobial resistance genes in Escherichia coli isolates from different aquatic ecosystems within the St. Clair River and Detroit River areas

Article Abstract:

Escherichia coli bacteria are isolated from surface water samples at six locations in the St. Clair River and Detroit River areas, which have represented diverse fecal pollution influences ranging from an urban municipal wastewater-affected site to a relatively unpolluted site several kilometers offshore in Lake St. Clair. The results have indicated that the distribution of pathotypes and of antimicrobial resistance genes in Escherichia coli isolates have differed significantly between sampling locations and that the Escherichia coli pathotype most commonly encountered was extraintestinal pathogenic Escherichia coli (ExPEC).

United States, Environmental aspects, Drug resistance in microorganisms, Microbial drug resistance, Detroit River, Report, Saint Clair River

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Different inactivation behaviors of MS-2 phage and Escherichia coli in TiO(sub 2) photocatalytic disinfection

Article Abstract:

The biocidal modes of action of hydroxyl radicals and other photooxidamts of two microorganisms, MS-2 phage and Escherichia coli is determined. Two different hydroxyl radical scavengers, tert-butonol and methanol, and an activator of the bulk phase hydroxyl radical generation, Fe(super 2+), were used to investigate their effects on the photocatalytic mode of action of the hydroxyl radical in inactivating the microorganism.

Titanium compounds, Electrochemical analysis, Properties, Structure

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Disinfection of water containing natural organic matter by using ozone-initiated radical reactions

Article Abstract:

Research reveals that hydroxyl radicals derived from the ozone chain reaction are effective for the inactivation of Bacillus subtilis endospore in water containing natural organic matter. Data indicate that the type of contamination and pH influence disinfection rate by hydroxyl radicals, whose disinfection CT value is several orders of magnitude smaller than that of ozone.

South Korea, Waste Management and Remediation Services, Industrial Gas Manufacturing, Water Pollution, Industrial gases, Ozone, Methods, Analysis, Physiological aspects, Comparative analysis, Disinfection and disinfectants, Disinfectants, Disinfection, Radicals (Chemistry), Chemical properties

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