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  • Title: Uriscreen, a rapid enzymatic urine screening test: useful predictor of significant bacteriuria in pregnancy.
    Author: Hagay Z, Levy R, Miskin A, Milman D, Sharabi H, Insler V.
    Journal: Obstet Gynecol; 1996 Mar; 87(3):410-3. PubMed ID: 8598964.
    Abstract:
    OBJECTIVE: To establish the reliability of a new rapid enzymatic screening test, the Uriscreen, in the detection of significant bacteriuria in pregnancy. METHODS: During a 6-month period, from July 1 to December 30, 1993, 313 consecutive pregnant patients were evaluated. Randomly voided, midstream, clean-catch urine specimens were used. Each sample was tested by routine laboratory culture and four rapid screening tests: the nitrite and leukocyte esterase dipstick, microscopic examination for pyuria, and the Uriscreen test. Results of the four rapid tests were compared with those of the urine culture. RESULTS: Twenty-four women (7.6%) had urine culture results indicating significant bacteriuria. The sensitivity of the nitrite test, the leukocyte esterase test, and a microscopic examination for pyuria was low (37, 52, and 56%, respectively). The Uriscreen test showed very high sensitivity (100%), lower specificity (81%), a high predictive value of negative results (100%), and a low positive predictive value (30%). CONCLUSIONS: The Uriscreen test is a reliable alternative to culture screening of all pregnant patients. A policy of performing a urine culture during pregnancy only on patients with a positive Uriscreen test will save as much as 80% of unnecessary cultures.
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