why does food in sealed containers spoil?

Question

Let’s say you hard boil an egg, disinfect a container, and put the egg in immediately after boiling (still in shell).

Several days later the egg will go bad, but why? Haven’t you already murdered the eggs microbes by boiling it, and the container’s microbes by disinfecting it?

Where does the bacteria or fungi come from to spoil the egg?

In: Biology

Answer 1

You have to disinfect it after it’s sealed – otherwise bacteria from your hands or the air will recontaminate the egg after cooking.

There are also some compounds in food that are unstable. Proteins may break down over days or weeks. While usually this won’t make food inedible, it may lead to undesirable colors, tastes, and textures.