E. coli

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Brief introduction of E. coli

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E. coli

  1. 1. Escherichia coli Anup Ghimire, Rock Face Limited
  2. 2. Common Microbes in Drinking Water • Cryptosporidium • Anabaena species • Copepods • Rotifers • E. coli • Rhizopus stolinifer • Naegteria fowleri • Legionella Pneumophila • Chaetomium species • Salmonella Enterica
  3. 3. E. Coli • Pathogenic bacteria found in the digestive tract of human and animal. • Sub group of faecal coliform bacteria
  4. 4. Sources in drinking water Human induced sources • Failing septic tanks, • leaking sewer lines • wastewater treatment plants • combined sewer overflow (CSOs) • urban storm water runoff
  5. 5. …sources in drinking water Animal sources • Manure spread on land • Livestock in runoff or in streams • Improperly disposed farm animal wastes • Pet and bird wastes
  6. 6. Coliform Test • Biological quality tested by total coliform test • Absence of coliform bacteria: safe drinking water • Presence of coliform bacteria: contaminated water
  7. 7. Health Effects • Abdominal cramps and diarrhoea • Cellular function such as protein synthesis, mitochondrial function, cytoskeletal function, cell division, ion secretion, transcription and apoptosis.
  8. 8. Categories of E. coli • enteropathogenic E.coli (EPEC) • entrohaemorrhagic E. coli (EHEC) • enterotoxigenic E. coli (ETEC) • enteroaggregative E. coli (EAEC) • enteroinvasive E. coli (EIEC) • diffusively adherent E. coli (DAEC)

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