As with females, the usual route of inoculation in males is with gram-negative aerobic bacilli from the gut, with E coli being the most common offending organism. Recent hospitalization, urinary catheter, and fluoroquinolone use in the past 6 months are independent risk factors for fluoroquinolone resistance in community-onset febrile E coli UTI. Fluoroquinolone resistance may be a marker of broader resistance, including extended-spectrum beta-lactamase positivity.
For more on the pathophysiology of UTIs in males, read here.
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Cite this: Bradley Schwartz. Fast Five Quiz: Are You Familiar With Urinary Tract Infections in Males? - Medscape - May 02, 2016.