Thursday, September 19, 2013

Safer Drinking Water

A Quest for Even Safer Drinking Water -"Water drawn from the faucet is markedly different from the water that leaves the system’s treatment facility. “The ecology,” Dr. Pace said, “is the distribution system.” Bacteria can evade disinfectant by slipping into an amoeba’s digestive system or inside protozoan cysts, persisting there for up to a hundred years. But many species survive in so-called biofilms — a sticky polymer made of DNA, proteins, and carbohydrates clinging to pipes like plaque. Back at the lab, Dr. Pace’s team is sequencing DNA in the water samples and finding evidence that this slime may be knocked loose, carrying organisms throughout a water distribution system." (read more at link above)

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