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Card 10 / 22:
Researchers have discovered that washing spinach with water several times does not prevent foodborne diseases due to E. coli . How can you explain this fact?
E. coli colonizes the surface of the leaf, forming a biofilm that is more difficult to remove than free (planktonic) cells. Additionally, bacteria can be taken up in the water that plants are grown in, thereby entering the plant tissues rather than simply residing on the leaf surface.
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