Epidemiology practice

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Tune this setMechanisms of disease · 20 questionschange
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Year 1common

A 70-year-old man presents with dysuria, a slow urinary stream, and a feeling of incomplete emptying. Urinalysis shows leukocytes and nitrites. He is afebrile and haemodynamically stable. His medications include tamsulosin and amlodipine. Which of the following best explains his increased risk of urinary tract infection?