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Biofilms Resist Bleach
"Harmful microbes suspended in a biofilm were still alive and well after 60 minutes exposure to bleach."
Reference: Scientific American
PHIL_ 2172_ lores.jpg (70 KB)
An electron micrograph of the Norovirus, with 27-32nm-sized viral particles.
Norwalk viruses (and related caliciviruses) are important causes of nonbacterial gastroenteritis in the United States. An estimated 181,000 cases of this type of food poisoning occur annually.