Originally posted by Gary Slusser
Fact is, most strains of e. coli are harmless.
Strain O157:H7 is well-known as a pathogen. And there are other strains that can cause some health-related problems. But to say that all e. coli is dangerous is not accurate, I'm afraid.
Nonetheless, if water tests positive for escherichia coli (regardless of type), then water disinfection is recommended. As being an "indicator bacteria", there then is the assumption that further, perhaps more dangerous, consequences may result from infection of water supplies. Normally, further tests are not even conducted because minimum levels of contamination have been surpassed.
The e. coli, itself, may not be dangerous to humans, but caution is always in order.
That's OK Mr. Slusser, it's not your fault. This is common knowledge for those who work with disinfection and public water systems. Often the general public just "reads the headlines' and don't do follow-up research, so they hear about E. COLI and public warnings and make assumptions and generalizations.
Andy Christensen, CWS-II









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