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Urinary Tract Infection & Pyelonephritis
Diagnostics
Diagnostics
Diagnostics
Urinalysis with Reflex Culture
A negative urinalysis can rule out a UTI, but a positive urinalysis has poor predictive value for UTI
Avoid contamination during collection (e.g. disinfection of adjacent mucosa, discard first urine collection, second, mid-stream sample sent to lab)
Urine Culture
Collect urine culture PRIOR to initiation of antimicrobial therapy (a single dose of antibiotics can sterilize urine)
Positive culture = >10
5
CFU/ml with no more than two species of microorganism
Blood Culture
Collect for patients with complicated UTI
Renal Ultrasound
Male
History of stones
Persistent infection despite antibiotics to rule out stone, obstruction, abscess
CT Scan
Better for identifying abscesses
In setting of emphysematous pyelonephritis (may require nephrectomy)