 Consider all forms of contamination when deciding if a food is safe or unsafe, as some forms or contamination will not leave any apparent signs.Bacteria may not be visible to the naked eye, debris (physical contamination) may be underneath the surface of a food, and chemicals may be clear or tasteless; the contaminated food may not change in smell, texture, appearance, or taste, and could still be contaminated.Any foods deemed contaminated should be disposed of immediately, and any surrounding food should be checked for additional contamination.