SummaryThe results of urine screening with the automated system«MS-2 Abbott»are in agreement with the calibrated loop method in 95,6 % of 410 routine urine specimens. The agreement reaches 97,5 % when yeasts (non detectable in 5 hours) are excluded from this comparative study. The major discrepancies occur in certain patients treated with antibiotics or with urine specimens positive forPseudomoms aeruginosacontaining between 10.000 and 100.000 organisms/ml.