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Review Question - QID 109126

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QID 109126 (Type "109126" in App Search)
An 86-year-old male with a history of hypertension and hyperlipidemia is sent to the hospital from the skilled nursing facility due to fever, confusion, and decreased urine output. Urinalysis shows 12-18 WBC/hpf with occasional lymphocytes. Urine and blood cultures grow out gram-negative, motile, urease positive rods. What component in the identified bacteria is primarily responsible for causing the innate immune response seen in this patient?