Catheter-associated UTIs (CAUTIs) don't follow the same rules as uncomplicated UTIs, and most patients are never told why. In this episode, host Melissa Kramer, PhD, talks with microbiologist Dr. Ana Flores-Mireles of the University of Notre Dame about how catheterization changes the bladder environment, why the protein fibrinogen becomes a "bed and breakfast" for bacteria and fungi like Candida auris, and how her lab is developing antibiotic-free, slippery catheter coatings to reduce infection and inflammation. She also shares emerging research linking long-term catheterization to bladder cancer markers, and what that could mean for people who rely on catheters long-term. Melissa and Dr. Flores-Mireles cover intermittent vs. indwelling vs. suprapubic catheters, whether D-mannose or probiotics have a role for catheter users, and why comorbidities like clotting disorders may predispose some people to more severe infections.

Key Takeaways

1. Catheterization changes the bladder environment.
Inflammation brings proteins like fibrinogen into the bladder to heal damage, but pathogens exploit them to attach and grow. Dr. Flores-Mireles calls it "a place to stay and a place to eat."

2. Prevention science is still catching up.
CDC guidance recommends changing indwelling catheters every two weeks, but even careful hygiene doesn't guarantee prevention. Firm recommendations aren't possible yet.

3. Antibiotic-free technology is on the horizon.
Dr. Flores-Mireles's lab developed a "slippery" catheter coating that blocks pathogen attachment without antimicrobials, and early data shows it also lowers bladder cancer markers. Clinical trials haven't started yet.

Links & Resources

• Dr. Flores-Mireles's faculty page, University of Notre Dame
• Live UTI Free