This may seem obvious, but it's helpful to remember that food spoilage is caused by tiny invisible organisms called bacteria
. As organisms go, bacteria lead fairly simple lives. They don't walk or crawl, so the only time they go anywhere is when someone moves them. Otherwise, they pretty much stay put, content to spend their time eating and making more of themselves.
What causes spoilage?
Photo © Aldo Gonzalez
Unfortunately, in the case of the bacteria that cause food spoilage and food poisoning, it's our food
that they're eating — especially foods that are high in protein, like meats, poultry, fish, eggs and dairy products.
Check out this article on what causes food spoilage
. You'll learn about what makes bacteria grow, and how to stop them from contaminating your food.