Bedside diagnosis of outpatient childhood urinary tract infection using three-media dipslide culture test.

To determine the accuracy of a three-media dipslide test, the Uricult Trio, for the diagnosis of childhood urinary tract infections (UTIs), we collected urine specimens from children at the outpatient department. Two hundred consecutive patients presenting with symptoms of UTI were examined. Randomly voided, midstream, clean-catch and catheterized samples were used. Each was tested by routine laboratory culture and the dipslide test. The subjects' ages ranged from 4 months to 7 years, with a median age of 5 years. There were 112 (56%) boys and 86 (43%) girls. Of the subjects, 98 (49%) showed urine culture results indicating significant bacteriuria. There was complete agreement in 70 cases (35%). The sensitivity and specificity of the dipslide were 68% and 82%, respectively. The positive and negative predictive values were 81% and 71%, respectively. The likelihood ratio for a positive test was 3.7, while for a negative test it was 0.39. The specificity, using Escherichia coli special agar, increased to 85% and the negative predictive value to 93%. The Uricult Trio dipslide method was technically simple and could be applied in the outpatient setting. Further studies are required, however, before it can be recommended as a routine diagnostic tool.