Bacteria in Food---Deadly or Helpful?

I'm sure you hear all those breaking news reports that have new deadly "bacteria" running arround in our favorite foods. Scary, right? Well, not exactly, because some bacteria can be quite beneficial to your health. Take yogurt, for example, this wholesome snack contains thousands of cultures that aid your digestive system, and alleviate stomach pains. People who commonly eat food full of bacteria (not the really sickening kind) have higher immunities to certain illnesses and better absorb nutrients. What do you think? Is bacteria helpful or harmful? Use some research before you post. Happy hunting!