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Distribution and fate of Escherichia coli in Lake Michigan following contamination with urban stormwater and combined sewer overflows

Recent research has focused efforts towards microbial source   tracking methods to differentiate between types of fecal   contamination so that water pollution abatement efforts are   allocated accordingly. These approaches are varied and can provide   different levels of discrimination; however, all the approaches  have inherent limitations. Antibiotic resistance testing may be   useful because it is based on the well-supported hypothesis that   humans and certain agricultural animals that are exposed to   antibiotics will harbor antibiotic resistant bacteria in their   gastrointestinal tract more frequently than hosts not exposed  to antibiotics.  Escherichia coli distribution and persistence in nearshore Lake   Michigan were assessed following heavy rains and sanitary sewer   overflow (SSO) and combined sewer overflow (CSO) events over a 5-  year period, including an 18-day period following 25.4 cm of   rainfall in which intensive studies were conducted following   multiple CSO and SSO events. E. coli isolated directly from sewage   treatment plant influent were found to have a marked increase in   antibiotic resistance traits for ten antibiotics commonly used in   the human population compared with isolates from two animal sources   of fecal pollution. However, E. coli obtained from sewage impacted   water (n = 2,513) and from stormwater impacted water (n = 1,465)   collected the previous year when there were no sewage overflows,   were found to have no significant difference (p <  . 5) in the   frequency of resistance when comparing the two conditions.   E. coli survival characteristics and population dynamics are most   likely influenced by multiple factors in complex systems such as the   watershed/estuarine/lake environments of the Great Lakes.    (microbial source tracking); (MST); (bacterial source tracking);   (BST)

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Cellular
Impact of Pollutants
Toxic Organics
Lake Basin Connecting Channels
Lake Michigan
State Province
Wisconsin
Resource Being Monitored
Human Health
Annex Numbers
Pollution from Non-Point Sources
Remedial Action Plans and Lakewide Management Plans
Research & Development
Annex 17
Control technologies for treatment of municipal and industrial effluents/emissions
General
Annex
  • Annex Numbers
    Annex Numbers
    Pollution from Non-Point Sources
    Remedial Action Plans and Lakewide Management Plans
    Research & Development
  • Annex 17
    Annex 17
    Control technologies for treatment of municipal and industrial effluents/emissions

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