In which temperature range do bacteria grow the most rapidly?

Bacteria grow most rapidly in the temperature range of 70F to 125F (21C to 52C), which is known as the "danger zone." Within this range, bacteria can double in number in as little as 20 minutes, facilitating rapid growth and increasing the risk of foodborne illnesses. This temperature range provides ideal conditions for bacteria because it is warm enough to promote metabolism and reproduction, but not too hot to kill them.

The lower temperature ranges, such as 32F to 40F (0C to 4C) and 41F to 70F (5C to 21C), inhibit bacterial growth significantly, with refrigeration slowing down their metabolic processes. The higher temperatures, particularly those above 165F (74C), begin to kill many types of bacteria. Maintaining safe temperature controls, especially keeping foods out of the danger zone, is crucial to ensure food safety and prevent spoilage or contamination.