A Bacteriuric Culture Before a Procedure That Barely Qualifies
A single patient, found bacteriuric on a routine pre-procedure urinalysis. The disagreement isn't about the guideline's existence — it's about whether a simple stent removal actually meets the mucosal-trauma bar the guideline's own exception was written around.
Dolores F., a 74-year-old woman who worked for decades as a seamstress and now spends most afternoons teaching her granddaughter to hem skirts on the same machine she used professionally for forty years, has had a ureteral stent in place for six weeks following treatment for a benign distal ureteral stricture. She feels entirely well — no fever, no dysuria, no flank pain, nothing that has changed since the stent went in. Today's visit is a routine one: flexible cystoscopy to remove the stent, expected to take under ten minutes, done under local anesthesia in the office the way it has been done twice before for her without complication. The pre-procedure urinalysis, sent as a standing protocol for anyone with an indwelling stent, comes back positive: greater than 100,000 colony-forming units of E. coli per milliliter, no white cells, no symptoms — asymptomatic bacteriuria, present in most patients who carry a stent for any length of time and, by itself, not something that would otherwise prompt any action at all.
The 2019 IDSA guideline on asymptomatic bacteriuria, updated by Nicolle et al., narrowed the list of situations where screening and treatment are actually recommended down to two: pregnancy, and endoscopic urologic procedures expected to cause mucosal trauma — the guideline's own language, chosen because the risk it is protecting against is sepsis from bacteria pushed into the bloodstream through a traumatized surface, not bacteriuria itself. A stent removal alone, without manipulation, dilation, or any instrument beyond the cystoscope needed to grasp and withdraw it, sits in a genuinely unclear place relative to that definition — plainly less traumatic than the ureteroscopy-with-lithotripsy the guideline was clearly written with in mind, but not obviously zero, either, in a way the guideline's own wording never quite resolves.
In pre-procedure clinic, reviewing the urinalysis
I'd rather give her one dose of ciprofloxacin than explain to her family why a routine stent removal turned into a hospital admission for sepsis. The downside of treating is small; the downside of not treating, in the rare case it goes wrong, is not.
Nicolle et al.'s 2019 IDSA update was deliberately narrow — it recommends screening and treatment only before endoscopic urologic procedures expected to cause mucosal trauma, and the panel wrote that language specifically to exclude the much larger population of bacteriuric patients undergoing lower-risk instrumentation. A stent removal without dilation or lithotripsy isn't the procedure that guideline was built around.
There's a second recommendation in the same document that nobody has mentioned, and it's the one that actually describes Dolores. The panel suggests not screening for or treating asymptomatic bacteriuria in patients living with implanted urologic devices — which is precisely what a ureteral stent is. On the guideline's own terms, the urinalysis that started this conversation is a test it recommends against sending. We're now debating how to treat a result we were advised not to generate.
'Small downside' isn't actually zero-cost — every unnecessary fluoroquinolone dose in a 74-year-old carries its own tendon and C. difficile risk, and treating bacteriuria that doesn't need treating is precisely the practice this guideline exists to stop.
I'm the one who'll actually be doing this, and her last two stent exchanges took under ten minutes with nothing beyond grasping and withdrawing the stent — no dilation, no laser. On the guideline's own terms, that's not a mucosal-trauma procedure. But I'd rather commit to a plan for the room than argue the guideline in the abstract: if it stays that simple, no antibiotic. If I end up needing to instrument further than expected, I give the dose then, in real time, rather than pre-treating for a scenario that usually doesn't happen.
Agreed: no antibiotic given ahead of the procedure; the urologist proceeds as planned with a single dose of ciprofloxacin available in the room if manipulation turns out to exceed simple stent withdrawal.
Not fully agreed on the general principle, though the specific plan satisfied everyone: the primary care physician's preference for routine pre-treatment in any bacteriuric patient facing instrumentation was not adopted here, but was not argued down to zero either — logged as a reasonable but guideline-discordant instinct worth revisiting case by case rather than defaulting to.