Urinary tract infection localization in women

Area of Science:

• Urology
• Infectious Diseases
• Nephrology

Background:

• Urinary tract infections (UTIs) are common in adult women.
• Determining the precise location of UTIs (upper vs. lower tract) is crucial for effective treatment.
• The antibody-coated bacteria (ACB) test is often used as an indicator of upper-tract infection.

Purpose of the Study:

• To determine the site of urinary infection in adult women using the bladder-washout technique (BW).
• To evaluate the correlation between the presence or absence of antibody-coated bacteria (ACB) and the infection site.
• To assess the diagnostic utility of ACB testing in identifying upper-tract versus lower-tract urinary infections.

Main Methods:

• The bladder-washout technique (BW) was employed to localize the site of infection in 51 adult women.
• Urine samples were analyzed for the presence of antibody-coated bacteria (ACB).
• Patient symptoms (upper-tract vs. lower-tract) were recorded and correlated with BW and ACB findings.

Main Results:

• The bladder-washout technique confirmed upper-tract infection in 37 patients and lower-tract infection in 14 patients.
• Of 37 upper-tract infections, 31 had positive ACB tests.
• Of 14 lower-tract infections, none had positive ACB tests. However, a subset of upper-tract infections (6/37) did not show ACB, indicating potential false negatives for ACB in upper-tract cases.

Conclusions:

• The bladder-washout technique is a reliable method for determining the site of urinary infection.
• A positive antibody-coated bacteria (ACB) test is highly indicative of an upper-tract infection.
• A negative ACB test should be interpreted cautiously, as it does not definitively exclude an upper-tract infection.