Management of Candiduria with Hematuria
In a patient with candiduria who develops hematuria, immediately evaluate for pyelonephritis, fungus ball formation, or disseminated candidiasis—these require urgent imaging and systemic antifungal therapy, not just observation. 1
Critical Initial Assessment
The presence of hematuria in a candiduria patient fundamentally changes management because it suggests:
- Invasive tissue infection (pyelonephritis or cystitis with mucosal invasion)
- Fungus ball formation causing obstruction and bleeding
- Possible disseminated candidiasis with renal involvement
Remove any indwelling bladder catheter immediately if feasible—this is strongly recommended regardless of symptoms 1. The catheter perpetuates infection and prevents clearance.
Diagnostic Workup
Obtain urgent imaging with CT or ultrasound to evaluate for:
- Hydronephrosis or urinary obstruction
- Fungus balls (aggregations of mycelia and yeasts)
- Renal abscesses
- Emphysematous pyelonephritis 1
These structural complications preclude successful treatment with antifungals alone and may require surgical intervention 1, 2.
Do not rely on pyuria or colony counts to differentiate infection from colonization—these are unreliable in catheterized patients 1. The hematuria itself, combined with candiduria, is your clinical indicator.
Treatment Algorithm
For Fluconazole-Susceptible Species (C. albicans)
Treat as symptomatic pyelonephritis:
- Oral fluconazole 200-400 mg (3-6 mg/kg) daily for 2 weeks 1
- This is a strong recommendation with low-quality evidence
For Fluconazole-Resistant Species (C. glabrata, C. krusei)
Use amphotericin B deoxycholate:
- 0.3-0.6 mg/kg IV daily for 1-7 days 1
- With or without flucytosine 25 mg/kg PO four times daily for 2 weeks 1
- Flucytosine monotherapy (25 mg/kg four times daily for 2 weeks) is an alternative for C. glabrata 1
Critical caveat: Lipid formulations of amphotericin B do NOT achieve adequate urine concentrations and should be avoided for urinary tract infections 1. Only amphotericin B deoxycholate is effective.
If Fungus Ball Identified
Surgical intervention is strongly recommended 1:
- Endoscopic removal of the fungal bezoar
- Relief of obstruction with ureteral stent or percutaneous nephrostomy
- Irrigation through nephrostomy tubes with amphotericin B deoxycholate 25-50 mg in 200-500 mL sterile water 1
- Continue systemic antifungals as above until symptoms resolve and cultures clear 3, 2
Special Considerations
If patient is neutropenic or very low birth weight infant (<1500g): Treat as candidemia with systemic therapy, not just as urinary tract infection 1. These high-risk patients require:
- Echinocandin or fluconazole (depending on prior exposure and local resistance patterns)
- Longer duration of therapy
- Evaluation for disseminated disease
Eliminate urinary tract obstruction if present—this is strongly recommended 1. Consider removal or replacement of nephrostomy tubes or stents if feasible.
Bladder irrigation with amphotericin B (50 mg/L sterile water daily for 5 days) may be useful for fluconazole-resistant cystitis, but has high relapse rates and is generally discouraged except for refractory cases 1.
Common Pitfalls
Do NOT use echinocandins or azoles other than fluconazole for urinary tract candidiasis—they achieve minimal urinary concentrations and are ineffective 1, 4.
Do NOT assume hematuria is from anticoagulation alone—pursue full evaluation even if patient is on antiplatelet or anticoagulant therapy 5. The combination of candiduria and hematuria warrants investigation.
Do NOT treat asymptomatic candiduria without hematuria—but hematuria changes this calculus by indicating tissue invasion 1.
The key distinction: hematuria transforms candiduria from likely colonization into probable infection requiring treatment and imaging to exclude serious complications like fungus balls or pyelonephritis.