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Coliform Bacteria

Coliform bacteria are nonpathogens present in fecal matter. The presence of coliform bacteria in a water supply indicates fecal contamination (sewage has contaminated the water). Coliform bacteria have the following properties:

  • Facultative aerobes
  • Gram negative
  • non-sporeforming rods
  • lactose-fermenting
  • typically not pathogenic
  • predominantly E. coli
  • used as an indicator of contamination of the water supply
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Coliform BacteriaComments