Be sure to check your produce and consider throwing out any products including raw spinach. The recent e.coli outbreak has been traced to a specific farm in California, but other baggers of produce mixes purchased from the grower.
If you need or want more information about e.coli, Food Consumer Org has a good article with a question and answer section covering most anything you'd want to know.
This spinach scare has caused a stir about the FDA. They monitor produce. Many experts are saying one single organization should manage all foods and that the FDA is grossly unstaffed to really check out the fresh foods market. Some companies may only be evaluated once every ten years currently.