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Abstract

COMPARE URINE CULTURE AND URINANALYSIS TEST (MICROSCOPIC, NITRITE AND LEUKOCYTE ESTERASE DIPSTICK TEST) IN THE DIAGNOSIS OF URINARY TRACT INFECTION

Shahram Bagheri, Leila Asadzadeh* and Maryam Asadzadeh

ABSTRACT

Introduction: Urinary tract infection is one of the most common bacterial infectious diseases and its early detection plays a key role in the prevention of secondary complications. Standard method in diagnosis of urinary tract infection is urine culture, but credit of urinalysis test as a screening test is the topic of discussion. Thus, the aim of this study was to determine the accuracy of urine analysis tests for diagnosis of urinary tract infection. The results: Of 288 patients studied, 98/57% female and 01/42 percent male had average ages of 35/20 ± 14/31 and 97/24 ± 09/34 years respectively. E. coli was the cause of producing 21/52% of urinary infections. After E. coli, Enterobacter (70/31 percent), Streptococcus (75/9%) and Pseudomonas (31.7 percent) held the next places in terms of prevalence. Sensitivity, specificity, positive predictive value and negative predictive value of nitrite test in the diagnosis of UTI were as follows: 17/73, 100, 100 and 73/95 percent. Sensitivity, specificity, positive predictive value and negative predictive value of leukocyte esterase test for the diagnosis of UTI were as follows: 46/41, 100, 100 and 14/91 percent. Sensitivity, specificity, positive predictive value and negative predictive value of urinary culture test in diagnosis of urinary tract infection were as follows: 100, 13/78, 15/43 and 100%. Discussion and conclusion: urine culture test is expensive and should not be used routinely unless nitrite and leukocyte esterase dipstick test results are positive.

Keywords: urinary tract infection, urine culture, nitrite and leukocyte esterase test.


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