Final answer:
The statement that only unopened individually packaged condiments are safe to re-serve is true because they remain sealed and protected from contamination, unlike opened or bulk condiments.
Step-by-step explanation:
The statement that only unopened individually packaged condiments are okay to re-serve is true. When it comes to food safety, unopened packaged condiments are designed to be sealed against contamination. Therefore, they can be kept and reused for other customers if they remain unopened. On the other hand, opened or bulk condiments should not be reused because once opened, they are exposed to environmental contaminants and can potentially harbor bacteria, leading to foodborne illnesses if they are not handled properly.
As for the other questions referenced, if you store cooked leftovers at room temperature for more than two hours, they are not safe to eat even if heated well, due to the risk of bacterial growth at temperatures between 40°F and 140°F, known as the 'danger zone'. Washing a melon before cutting it is essential because the knife can transfer pathogens from the rind to the edible part. And indeed, foodborne diseases can sometimes cause severe health conditions and symptoms, making it important to follow good food safety practices.