You've got to be kidding. That's just irrational germophobia. The microbes that might be carried on the surface of groceries are of zero risk to healthy people. You're exposed to a wide range of pathogens all the time without even noticing. In developed countries it's rare to find pests in store bought groceries, and even if you do so what? Eating a worm in your apple won't do you any harm. I would be more concerned about the pesticides than the pests.