Bacterial Nutrient Needs While different types of bacterium have varying diets, they all require nutrients to provide energy. Energy is necessary to fuel work inside the cell. Some bacteria get their energy from sunlight using unique metabolic methods.
Bacterial growth slows down or stops in food that is kept at temperatures colder than 5°C or hotter than 63°C. Most bacteria can survive cold temperatures though, (in a fridge or freezer), and resume multiplication when they are back in the Danger Zone.