In September 2006. E.coli was discovered in spinach crops. this caused wide-spread issues with not only the farmers and the company's but it hit home hard.
"Eat your Veggies honey"
This could have been a death pact for any young person trying to get "big and Strong" like mommy and daddy said.
No source was found for the outbreaks of the E.Coli, but, the general public was informed to try to stop the spread of this issue. Even this was not effective in stopping the Problem at hand.
You should always wash your Greens, not matter there source. wash your hands and keep a clean workspace in the kitchen and in general. the FDA is trying very hard to find the source. but till then be cautious.