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Asymptomatic bacteriuria in long-term care — CCFP MCQ

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HardGeriatricsAsymptomatic bacteriuria in long-term careCCFP

An 88-year-old woman in long-term care presents with new-onset agitation. Temperature is 37.0°C, oxygen saturation 96%, and she denies dysuria. Urinalysis shows leukocytes and nitrites. Staff note she has eaten less since a room change 3 days ago and is constipated. Vital signs are stable and there are no signs of sepsis. What is the most appropriate next step in management?

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Correct answer: D — Assess for delirium contributors including environmental, metabolic, and bowel factors; avoid antibiotics for asymptomatic bacteriuria

Explanation lettering: E = shown as A · D = shown as C · C = shown as D · A = shown as E

The correct answer is **C**. This is a common but harmful error in long-term care: treating bacteriuria based on a positive dipstick in an asymptomatic, haemodynamically stable elderly resident. Current Canadian guidance (CFP 2024, CMAJ) and Cochrane evidence are explicit: asymptomatic bacteriuria in long-term care confers no benefit from antibiotic treatment and causes harm through adverse events, resistance, and C. difficile. The clinical picture points to delirium from modifiable causes (room change, reduced intake, constipation)—not urinary infection. **Why distractors fail:** A treats bacteriuria without symptoms or signs of infection (contradicts evidence). B ignores the underlying reversible delirium causes and risks polypharmacy harm. D wastes resources and may inappropriately trigger further treatment decisions. E is ineffective and potentially harmful (dehydration risks). **The discriminator** is recognizing that bacteriuria ≠ UTI in asymptomatic elderly, and that systematic delirium assessment (not empirical antibiotics) is the standard of care.

Reference: College of Family Physicians of Canada. When urine testing to rule out infection does more harm than good. Can Fam Physician. 2024;70(9):551. https://www.cfp.ca/content/70/9/551