I always wash purchased greens, even the bags marked triple washed. Last week I opened a bag of triple washed baby spinach and a little grasshopper jumped out.
I grow most of my own greens, so it's not an issue for me, but if I use store bought, I use a 50ppm chlorine soak on anything eaten raw. I don't have a spleen anymore (misplaced it on a mountain a while back), and shigella is BAD NEWS(tm) with a compromised immune system.
It's commonly spread by 3rd world workers in the field without sanitation facilites. Fecal splashing, I believe, is the technical term.
/johnny
If there is a bug in vegetables, then there couldn’t be a lot of pesticides in them.
:-)