Treatment of Catheter-Associated UTI with Positive Nitrite Test

First-Line Empirical Treatment Options

The European Association of Urology strongly recommends intravenous third-generation cephalosporin as a first-line empirical treatment for catheter-associated urinary tract infections (CAUTI) with a positive nitrite test 1
Amoxicillin plus an aminoglycoside is recommended as a first-line empirical treatment for CAUTI with a positive nitrite test 1
Second-generation cephalosporin plus an aminoglycoside is recommended as a first-line empirical treatment for CAUTI with a positive nitrite test 1

CAUTIs have a broader microbial spectrum than uncomplicated UTIs, with common pathogens including E. coli, Proteus spp., Klebsiella spp., Pseudomonas spp., Serratia spp., and Enterococcus spp., according to the European Association of Urology 1, 2
Antimicrobial resistance is more likely in catheter-associated UTIs, necessitating broader spectrum initial therapy, as recommended by the European Association of Urology 1, 2

The treatment duration for CAUTI with a positive nitrite test is 7 days if symptoms resolve promptly, as recommended by the European Association of Urology 1, 2
The treatment duration for CAUTI with a positive nitrite test is 10-14 days for patients with delayed response, according to the European Association of Urology 1, 2
The treatment duration for male patients with CAUTI where prostatitis cannot be excluded is 14 days, as recommended by the European Association of Urology 2

If the catheter has been in place for ≥2 weeks at the onset of UTI, it should be replaced to hasten resolution of symptoms and reduce the risk of subsequent infection, as recommended by the European Association of Urology 1, 2
A urine specimen for culture should be obtained prior to initiating antimicrobial therapy due to the wide spectrum of potential infecting organisms and increased likelihood of antimicrobial resistance, according to the Infectious Diseases Society of America 3, 2

Nitrofurantoin is recommended for oral step-down therapy after clinical improvement for uncomplicated UTIs due to susceptible organisms, as recommended by the European Association of Urology 4, 1
Fosfomycin is recommended for oral step-down therapy after clinical improvement for uncomplicated UTIs due to susceptible organisms, according to the European Association of Urology 4
Fluoroquinolones are recommended if local resistance rates are <10% and patient has not used fluoroquinolones in the last 6 months, as recommended by the European Association of Urology 1
Plazomicin, ceftazidime-avibactam, or polymyxin-based combination therapy is recommended for carbapenem-resistant Enterobacterales (CRE), according to the European Association of Urology 4

Local antimicrobial resistance patterns should guide empirical therapy choices, as recommended by the European Association of Urology 1, 2
Fluoroquinolone resistance is emerging, particularly in older patients, so these agents should be used judiciously, according to the European Association of Urology 2
For patients with infections resistant to oral antibiotics, culture-directed parenteral antibiotics should be used for as short a course as reasonable, as recommended by the European Association of Urology 2

Do not rely solely on urine dipstick tests in elderly patients, as specificity ranges from 20% to 70%, according to the European Association of Urology 5
Avoid treating asymptomatic bacteriuria in catheterized patients unless specific indications exist, as recommended by the European Association of Urology 5, 2
CAUTIs are the leading cause of secondary healthcare-associated bacteremia, with approximately 20% of hospital-acquired bacteremias arising from the urinary tract, according to the European Association of Urology 1