TTU Food Sanitation Exam 1 Practice Test

What does 'small infective dose' refer to?

The amount of food needed to cause illness The number of viruses, bacteria, or toxin dose required to cause illness The time needed for illness The pH threshold for illness

Correct Answer:

The number of viruses, bacteria, or toxin dose required to cause illness

Explanation:

The main idea here is the infectious dose—the smallest amount of a pathogen (or toxin) needed to cause illness after exposure. A small infectious dose means that only a tiny number of microbes, or a small amount of toxin, can make a person sick. That’s why some diseases are so dangerous in food: they require very few organisms to trigger illness. The correct description is about how much biological agent is necessary to cause disease, not about how much food is eaten, how long exposure lasts, or the pH level.

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