Many people believe in the ‘five-second rule’—the idea that food dropped on the floor is safe to eat if picked up within five seconds. However, recent studies reveal that this notion is misleading. Bacteria can transfer to food almost immediately upon contact with contaminated surfaces, regardless of the time elapsed.
Research conducted by scientists at Imperial College London indicates that the type of food and the surface it falls on significantly affect bacterial transfer. For instance, wet foods like watermelon are particularly prone to contamination when they hit hard surfaces such as tile or steel. This means that even a quick rinse may not eliminate harmful bacteria.
Moreover, bacteria can linger on surfaces for hours, posing a risk even if the food is dropped long after the initial contamination. One study found that bacteria from contaminated surfaces could still transfer to food even two hours later, highlighting the persistent nature of these pathogens.
For those who might be more susceptible to infections, or if pets have been around, it’s advisable to discard any food that has touched the floor. The five-second rule may offer a false sense of security, and it’s better to err on the side of caution when it comes to food safety.
Source: The Guardian
