Examkin

Soru

Zorluk: KolayInfectious Diseases

A 78-year-old woman is brought to the primary care clinic for a routine wellness visit. Her daughter reports that the patient has been eating well, sleeping normally, and participating in her usual daily activities. Her medical history is notable for hypertension and mild Alzheimer dementia. The patient's cognitive function is at her usual baseline, and she has not experienced any recent falls, confusion, or behavioral changes. She denies dysuria, increased urinary frequency, or lower abdominal pain. Vital signs, including a temperature of 37.1∘C37.1^{\circ}\mathrm{C} (98.8∘F98.8^{\circ}\mathrm{F}), are within normal limits. A urinalysis is obtained as part of a general screening panel, which returns positive for leukocyte esterase and nitrites. A subsequent urine culture grows >105>10^5 colony-forming units/mL of Escherichia coli. Which of the following is the most appropriate next step in management?

  1. Reassurance and clinical observationCevap
  2. B
    Initiation of oral ciprofloxacin
  3. C
    Initiation of oral nitrofurantoin
  4. D
    Initiation of oral fosfomycin
  5. E
    Repeat urine culture in one week

Cevap

Reassurance and clinical observation is the correct management, as the patient has asymptomatic bacteriuria.
The correct answer emphasizes that asymptomatic bacteriuria is a common, benign finding in older adults. Because the patient is entirely asymptomatic and at her cognitive baseline, no treatment is indicated. Treating this condition is a classic example of poor antimicrobial stewardship.

Adım Adım Çözüm

1
Evaluate the patient's symptoms and cognitive baseline.
The patient is at her baseline cognitive function, has no signs of delirium, and denies any localized urinary symptoms.
To differentiate between a true, symptomatic urinary tract infection (UTI) and asymptomatic bacteriuria.
2
Interpret the urinalysis and urine culture results in the context of the clinical presentation.
The patient has a positive urine culture without associated clinical symptoms of infection.
Positive cultures in asymptomatic elderly patients indicate benign colonization rather than an invasive infection.
3
Determine the indication for antimicrobial therapy based on current stewardship guidelines.
No antibiotics or further diagnostic tests are indicated.
Treating asymptomatic bacteriuria in the general older adult population does not improve clinical outcomes and needlessly exposes patients to adverse drug events.

Anahtar Kavram

Asymptomatic bacteriuria (ASB) in the elderly population represents benign colonization and should not be screened for or treated with antibiotics, even in the presence of positive urinalysis or culture results.
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