Urinary Tract Infection (UTI)

Bacteriuria is not infection - Asymptomatic bacteriuria is colonization: organisms in a clean specimen with no dysuria, frequency, urgency, fever, or flank pain. It is the background rate in older patients — 15% or more at 65 to 80, 40% to 50% past 80 — so a positive culture on its own in an asymptomatic patient is a different finding from a symptomatic UTI and should not drive the same decision.

Pin down which one you have - Ask about dysuria, frequency, urgency, and suprapubic pain, then look for the systemic layer: temperature, heart rate, flank pain, nausea and vomiting. Pull the urinalysis and culture, the WBC, and the creatinine. Fever plus flank pain plus vomiting means the infection has ascended to the kidney and this is no longer a bladder problem.

Look for what makes it complicated - Obstruction, a stone, an indwelling catheter, recent instrumentation, immunocompromise, recurrent infection, pregnancy. Those are the features that turn a routine UTI into the hospital's most common source of sepsis, and they set how much room you have to proceed.

Volume status in pyelonephritis - Vomiting and poor oral intake in a febrile patient means a volume-down starting point. Load before induction rather than chasing the pressure afterward, and cut the induction dose to match.

Antibiotics before instrumentation - Cystoscopy, ureteroscopy, and stone work push organisms out of infected urine into the circulation. Confirm the culture-directed antibiotic was actually given, and given early enough to work, before the scope goes in.

Pregnancy raises the stakes - Pyelonephritis is the most common serious medical condition seen in pregnancy and often follows an inadequately treated lower UTI. A pregnant patient with fever and flank pain gets obstetric involvement, not a straight trip to the room.

Renal function follow-through - Get a creatinine on anyone with pyelonephritis, obstruction, or recurrent complicated infection before you pick renally cleared drugs or reach for an NSAID.

Urinary tract infection (UTI) is bacterial infection of the bladder and its associated structures, and it is the most common bacterial infection in women — roughly 40% will have one in their lifetime, and 27% to 46% will have another within a year. Uncomplicated infection stays in the lower tract as cystitis. Ascending spread to the kidney produces acute pyelonephritis: fever, flank pain, nausea, and vomiting layered on top of dysuria, frequency, and urgency. Complicated UTI — obstruction, stones, an indwelling catheter, immunocompromise, recurrent infection — is one of the most common sources of sepsis in hospitalized patients and can progress to florid, fatal urosepsis.

Asymptomatic bacteriuria is a separate entity: organisms in a properly collected specimen with no symptoms, present in 15% or more of people aged 65 to 80 and in 40% to 50% after age 80.