Treatment for Yeast Infection in Urine
For most patients with asymptomatic candiduria, no antifungal treatment is needed—simply remove the urinary catheter if present. 1
Key Decision Point: Symptomatic vs Asymptomatic
The management of candiduria hinges entirely on whether the patient has symptoms and specific risk factors for dissemination.
Asymptomatic Candiduria (Most Common)
Do NOT treat with antifungals unless the patient falls into one of these high-risk categories 1:
- Neutropenic patients
- Very low-birth-weight infants (<1500 g)
- Patients undergoing urologic procedures
Instead, focus on:
- Remove indwelling bladder catheter if feasible (resolves candiduria in ~50% of cases) 1, 2
- Eliminate other predisposing factors (diabetes control, stop unnecessary antibiotics)
Symptomatic Candiduria Requiring Treatment
When treatment is indicated, the approach depends on the site of infection and Candida species susceptibility:
Treatment Algorithms
For Candida Cystitis (Bladder Infection)
First-line for fluconazole-susceptible organisms:
- Oral fluconazole 200 mg (3 mg/kg) daily for 14 days 1
For fluconazole-resistant C. glabrata:
- Amphotericin B deoxycholate 0.3–0.6 mg/kg daily for 1–7 days, OR
- Oral flucytosine 25 mg/kg four times daily for 7–10 days 1
For C. krusei:
- Amphotericin B deoxycholate 0.3–0.6 mg/kg daily for 1–7 days 1
Critical adjunct: Remove bladder catheter if present 1
For Candida Pyelonephritis (Kidney Infection)
First-line for fluconazole-susceptible organisms:
- Oral fluconazole 200–400 mg (3–6 mg/kg) daily for 14 days 1
For fluconazole-resistant C. glabrata:
- Amphotericin B deoxycholate 0.3–0.6 mg/kg daily for 1–7 days with or without oral flucytosine 25 mg/kg four times daily 1
- Alternative: Flucytosine monotherapy 25 mg/kg four times daily for 14 days (weaker recommendation) 1
For C. krusei:
- Amphotericin B deoxycholate 0.3–0.6 mg/kg daily for 1–7 days 1
Critical interventions:
Special Circumstances
Patients undergoing urologic procedures:
- Treat prophylactically with oral fluconazole 400 mg (6 mg/kg) daily OR amphotericin B deoxycholate 0.3–0.6 mg/kg daily for several days before and after the procedure 1
Neutropenic patients and very low-birth-weight infants:
- Treat as candidemia (systemic infection) regardless of symptoms 1
Important Clinical Considerations
Why fluconazole is preferred: It achieves high urinary concentrations, has excellent oral bioavailability, and has a strong safety profile 3, 4. This is the 2016 IDSA guideline recommendation with moderate-quality evidence for cystitis 1.
Drugs that DON'T work well for urinary infections:
- Echinocandins (caspofungin, micafungin, anidulafungin) achieve poor urinary concentrations 3, 5
- Other azoles besides fluconazole have inadequate urinary excretion 5
Common pitfall: Treating asymptomatic candiduria unnecessarily. Studies show that 31.3% of patients receiving antifungal therapy for candiduria were treated unnecessarily 6. This increases risk of antifungal resistance and MDR colonization without improving outcomes 7, 8.
Bladder irrigation: Amphotericin B deoxycholate bladder irrigation (50 mg/L sterile water daily for 5 days) may be useful for fluconazole-resistant cystitis (C. glabrata, C. krusei), but this is a weak recommendation 1. This should not be first-line therapy.
Species identification matters: C. albicans remains most common (60-83% of isolates), but non-albicans species including C. glabrata and emerging Candidozyma auris are increasingly seen, especially in patients with prior antifungal exposure 2, 6. Always obtain susceptibility testing when available.