Question: A 31-year-old woman with a history of nephritic colic 4 years ago consulted in the emergency department for left lumbar pain of colic characteristics for 3 days with the appearance of fever during the last 12 hours. The presence of 15,000 leukocytes / uL, 85% neutrophils, creatinine 0.8 mg / dL and PCR 20 mg / dL stand out in the blood analysis. The urine sediment reports countless leukocytes / field. Which of the following statements is true? 
 Options:  <1> Since it is an uncomplicated urinary tract infection, we must treat it with oral antibiotherapy and evolutionary control. <2> It is advisable to perform an urgent imaging study to rule out obstruction of the upper urinary tract that requires drainage. <3> This patient has a complicated urinary tract infection and it is most likely that the causative agent is S. aureus. <4> It is best to start treatment with fluconazole and control it in the outpatient clinic in 1 week. <5> The patient has acute pyelonephritis and the optimal treatment is the combination of bladder catheterization with intravenous antibiotic therapy.
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