[Nitrite test in Pseudomonas aeruginosa urinary tract infections].
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).


CONCLUSIONS
The urine nitrite test may be positive in PA UTI, therefore, a positive test does not rule out Pseudomonas UTI.
Goldman
Michael
M
Department of Pediatrics, Assaf Harofeh Medical Center, Zerifin, Israel. mgoldman@walla.co.il
Rosenfeld-Yehoshua
Noa
N
Lazarovitch
Tsilia
T
Aladjem
Mordechay
M
Grisaru-Soen
Galia
G
D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009573:Nitrites / Q000652:urine*; D011552:Pseudomonas Infections / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000652:urine; D011550:Pseudomonas aeruginosa; D011776:Pyuria / Q000453:epidemiology; D015203:Reproducibility of Results; D012189:Retrospective Studies; D014463:Ultrasonography
D009573:Nitrites