Which of the following is considered a symptom of foodborne illness?

A symptom of foodborne illness typically involves a range of physical reactions that occur after consuming contaminated food or beverages. Fever and diarrhea are well-documented symptoms associated with many types of foodborne illnesses caused by bacteria, viruses, or parasites. These reactions are the body's way of attempting to fight off the infection or the toxins produced by pathogens.

Fever indicates that the body is responding to the infection by increasing its temperature to help combat the invading microorganisms. Diarrhea is another common symptom as it helps the body to expel the harmful agents quickly, preventing further absorption of toxins. Collectively, these symptoms can create significant discomfort and may lead to dehydration if not managed properly.

On the other hand, improved digestion, weight loss, and increased appetite are not typical symptoms of foodborne illness. Improved digestion is a positive health indicator rather than a symptom of illness, while weight loss can occur over time as a result of long-term health issues and not immediately after a foodborne illness. Increased appetite often does not align with the immediate aftermath of foodborne pathogens, as most individuals experience a loss of appetite when feeling unwell.