When would you refer a customer who is experiencing diarrhoea?

Question

BlackTom AI · Accepted Answer

Blood visible in the stool is an alarm sign because it suggests an invasive infection or gastrointestinal bleeding that needs medical assessment, so option C is correct.

Relevant knowledge points and concepts:
- Diarrhoea is usually self-limiting and can be managed with rehydration and symptomatic care when mild and uncomplicated.
- Red flags requiring medical referral include blood or pus in the stool, high fever, severe abdominal pain, signs of significant dehydration, immunocompromise, very young or elderly patients, or prolonged symptoms (typically >48 hours in adults).
- Recent travel, smoking status, or very short duration (e.g. a few hours) are not by themselves absolute reasons for urgent referral.

Step-by-step reasoning:
1. Identify red flags from the options: “blood in the stools” is a classic red flag; it can indicate dysentery, invasive bacterial infection (e.g. Salmonella, Shigella), inflammatory bowel disease, or GI bleeding.
2. Assess timing: 4 hours of symptoms (option A) is too brief—most community diarrhoea will be observed for longer and managed conservatively unless red flags are present.
3. Travel history (option B) can modify differential diagnosis (e.g. travel-associated pathogens) but does not automatically mandate immediate referral unless accompanied by other red flags (e.g. high fever, blood, severe dehydration).
4. Smoking (option D) is unrelated to the acute management decision for diarrhoea.

Why C is correct:
- Blood in stools represents mucosal invasion or bleeding and requires investigation (stool cultures, possibly endoscopy, and targeted therapy). This cannot be safely managed with simple over‑the‑counter measures and therefore warrants referral.

Why other options are incorrect:
- A (4 hours): too short to trigger referral in isolation.
- B (interstate travel): travel alone is not an urgent referral criterion without red flags.
- D (smoker): smoking status does not determine acute referral for diarrhoea.

Conclusion: The correct choice is C. If there is blood in the stools — refer the customer. This matches the provided answer.

When would you refer a customer who is experiencing diarrhoea?单项选择题

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