It can become contaminated with bacteria, so it is best to cover it, just like any prepared food. Mayonnaise is acidic because of the vinegar content, which suppresses bacterial growth. It is contamination from other ingredients, often raw, that cause a dish containing mayonnaise to spoil. It is important to handle foods safely. Keep all utensils and cutting surfaces clean. Always wash your hands for 15 seconds with soap and ward water before handling food and rewash if your hands come in contact with dirt or raw meat/poultry.
Wash your hands before you eat:).
Wash your hands before you eat:).
