Multiple Choice: Which of the following is not true with regards to viruses?

Question

Multiple Choice: Which of the following is not true with regards to viruses?

BlackTom AI · Accepted Answer

Norovirus is the leading cause of foodborne illness in the United States, so the statement "Viruses cause fewer foodborne illnesses than bacterial pathogens in the US" is false.

1) Relevant concepts:
- Foodborne illness agents include viruses, bacteria, parasites, and toxins. 
- Surveillance data (CDC and foodborne-disease burden studies) attribute the majority of domestically acquired foodborne illness cases to norovirus and other viruses rather than to bacterial pathogens. 
- Biological reasons viruses (especially norovirus) spread widely: very low infectious dose, environmental stability, frequent contamination by infected food handlers, and efficient person-to-person transmission.

2) Step-by-step reasoning:
- The claim asserts viruses cause fewer foodborne illnesses than bacterial pathogens. That is a comparative factual statement about incidence. 
- Public health data identify which agent groups cause the greatest number of cases. These data show viruses (chiefly norovirus) account for the largest share of foodborne illness cases. Therefore the comparative part of the claim is incorrect.

3) Calculations / intermediate steps:
- No numeric calculation is required to determine truth here; the comparison is decided by surveillance-derived proportions. If one uses percent shares from CDC burden estimates, viruses represent the plurality/majority of cases, exceeding the share attributed to bacterial causes.

4) Why the correct answer is correct:
- Because the question asks which statement is not true about viruses, selecting the false comparative statement is correct. The provided choice is false: viruses do not cause fewer foodborne illnesses—they cause more (norovirus alone is the single largest cause).

5) Why other options are incorrect:
- No other answer options were provided in the prompt. If typical alternative statements (e.g., "Viruses require living cells to replicate" or "Viruses are nonliving outside hosts") were present, those would be true and thus not the correct selection for "not true."

Conclusion: The listed statement is not true, so the correct answer given ("Viruses cause fewer foodborne illnesses than bacterial pathogens in the US") is correctly identified as false.

Multiple Choice: Which of the following is not true with regards to viruses?单项选择题

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