Read this interesting article in the South Bend Tribune, written by Marshall V. King, a food writer based in Goshen, IN. As an experiment, he kept a McDonald’s plain hamburger for 10 years, and it never molded.
Said King, “I’ve said it before and I’ll say it again: Fast food has so much salt and preservatives and that it shouldn’t surprise any of us that no mold appears if it’s left to air-dry. The burger’s wrapper indicates it had 520 mg of sodium. If you buy a fast food sandwich and put it in a sealed plastic bag, you’ll likely get mold.”
Read the entire article in the South Bend Tribune.