Moving from bag to catheter for urine collection in non-toilet-trained children suspected of having urinary tract infection: a paired comparison of urine cultures

Cécile Etoubleau, Marianne Reveret, Delphine Brouet, Isabelle Badier, Philippe Brosset, Laurent Fourcade, Claire Bahans, Fabien Garnier, Philippe Blanc, Vincent Guigonis
Journal of Pediatrics 2009, 154 (6): 803-6

OBJECTIVE: To compare, in the same children, urine culture results from bag- versus catheter-obtained specimens with catheter culture as the reference.

STUDY DESIGN: A total of 192 non-toilet-trained children <3 years of age from 2 emergency departments were recruited for this prospective cross-sectional study. All had positive urinalysis results from bag-obtained specimens that were systematically checked with a catheter-obtained specimen before treatment. Results of comparison of urine cultures obtained with these 2 collecting methods are presented.

RESULTS: A total of 7.5% of bag-obtained specimen positive cultures had false-positive results. Twenty-nine percent of bag-obtained specimen cultures with negative results were false negative. Altogether, bag-obtained specimens led to either a misdiagnosis or an impossible diagnosis in 40% of cases versus 5.7% when urethral catheterization was used.

CONCLUSION: Every bag-obtained positive-result urinalysis should be confirmed with a more reliable method before therapy.

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