GIOny said:
OK, I have to admit - I am one of those people who have never thought to wash the "pre-washed" bagged salads...

I thought it was already washed???

So when you say to WASH it thoroughly, do you mean just rinse it with water (and what good does that do??) or do you actually use soap and wash each piece thoroughly?? I eat salads every day so this subject of poisoning from lettuce has me perplexed....
http://aggie-horticulture.tamu.edu/extension/poison.html
interestingly, the above web site does not mention salads as a major or minor source of
any type of food poisioning so my guess is you are pretty safe eating them. I remember the green onion chi chi problem but that was evidently pretty rare and if i remember they were from imported onions which are more commonly grown with night soil than the us produce.
i have to say i question some of the e coli hype..mainly because our area has well water and is rural so farm animals abound yet most of the local produce /wells if properly capped are clean. wouldn't be the case if it so common in the soil to contaiminate all the surface veggies unless you fertilize with uncomposted manure( which would kill the plants most likely) it
can contaminate wells I as have heard of
some being comtaminated but it is not
rampant as some of the lettuce scare posts might seem to imply. we also live in amish land and so horses are common on the streets and even thought their manure( horses', not amish) was getting nto the local water supply ( eww, they now are supposed to clean up the horse dooky but don't) i really never heard of anyone getting sick due to it and it was a big stink( true in both regards but no pun intended )so i'm sure it would have been plastered all over the papers if there was one case of it.