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Updated: Jul 11, 2026

Tools for the Real-Time Assessment of a Pseudomonas aeruginosa Infection Model
Published on: April 6, 2021
[Nitrite test in Pseudomonas aeruginosa urinary tract infections]
Michael Goldman1, Noa Rosenfeld-Yehoshua, Tsilia Lazarovitch
1Department of Pediatrics, Assaf Harofeh Medical Center, Zerifin, Israel. mgoldman@walla.co.il
Unlabelled:
Pseudomonas aeruginosa (PA) is considered to be bacteria with a low capability to produce nitrite.
Objective:
To investigate the incidence of a positive urine nitrite test in community-acquired urinary tract infections (UTI) in children, caused by PA.
Methods:
The medical records of 38 children (18 females) admitted for febrile PA UTI during a period of 7 years were reviewed. Urine nitrite tests were carried out using dipstrips, and results were reported as positive or negative.
Results:
Of the 38 patients, 17 had a positive nitrite test and 21 had a negative test (proportion of positive 0.45, 95% confidence interval 0.29 to 0.61). Pyuria was detected in 13/17 patients with a positive nitrate test vs. 5/21 with a negative test (p=0.003). Data regarding renal ultrasound (US) were available for 35 patients, and in 20 abnormalities were detected, 14/17 in the positive vs. 6/18 in negative nitrite group (p = 0.001).
Conclusion:
The urine nitrite test may be positive in PA UTI, therefore, a positive test does not rule out Pseudomonas UTI.
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