Treatment of Candida Lusitaniae Urinary Tract Infection

Treatment Algorithm Based on Clinical Presentation

• The Infectious Diseases Society of America recommends fluconazole 200 mg (3 mg/kg) daily for 2 weeks as the first-line treatment for symptomatic Candida lusitaniae UTI due to its high urinary concentrations, oral formulation, and proven effectiveness 1
• Treatment should continue until symptoms have resolved and urine cultures no longer yield Candida species, as recommended by the Clinical Infectious Diseases guidelines 2

Management of Urinary Catheters and Obstruction

• The Clinical Infectious Diseases guidelines strongly recommend elimination of urinary tract obstruction as a critical part of treatment 1
• For patients with nephrostomy tubes or stents, the Infectious Diseases Society of America considers removal or replacement if feasible 1

Common Pitfalls to Avoid

• The Clinical Infectious Diseases guidelines advise against using echinocandins or other azoles (besides fluconazole) for lower urinary tract infections, as they have minimal excretion into urine and are generally ineffective for treating Candida UTI 1
• The Infectious Diseases Society of America recommends against using lipid formulations of amphotericin B, which do not achieve adequate urine concentrations 1

Monitoring and Follow-up

• The Clinical Infectious Diseases guidelines recommend monitoring for clinical improvement and obtaining follow-up urine cultures to confirm clearance of infection 2
• For persistent infection despite appropriate therapy, the Infectious Diseases Society of America considers imaging to rule out anatomical abnormalities or fungus balls 1

Treatment of Candida lusitaniae Urinary Tract Infections

Initial Clinical Assessment

• The Infectious Diseases Society of America recommends that asymptomatic candiduria does not require treatment unless the patient is neutropenic, a very low-birth-weight infant, or undergoing urologic procedures 3, 4
• Removing or replacing urinary catheters immediately if feasible can resolve candiduria in approximately 50% of cases, as recommended by the Infectious Diseases Society of America 4

Treatment Algorithm for Symptomatic Infection

• The Infectious Diseases Society of America recommends fluconazole 200 mg (3 mg/kg) orally daily for 2 weeks as first-line therapy for cystitis (lower UTI) 3
• For pyelonephritis (upper UTI), the Infectious Diseases Society of America recommends fluconazole 200-400 mg (3-6 mg/kg) orally daily for 2 weeks 3, 4
• Alternative therapy with amphotericin B deoxycholate 0.3-0.6 mg/kg IV daily for 1-7 days or flucytosine 25 mg/kg orally 4 times daily for 7-10 days may be considered if fluconazole cannot be used, as recommended by the Infectious Diseases Society of America 3, 4

Special Population Considerations

• The Infectious Diseases Society of America recommends prophylactic treatment with fluconazole 400 mg (6 mg/kg) daily or amphotericin B deoxycholate 0.3-0.6 mg/kg daily for several days before and after urologic procedures in patients undergoing these procedures 3, 4

Treatment Duration

• The standard duration of treatment is 2 weeks for uncomplicated cystitis, as recommended by the Infectious Diseases Society of America 3