Evaluating the diagnostic value of nitrite test in comparison with U/S results in patients with urinary tract infection symptoms: A cross-sectional study

The purpose of this study is to evaluate the diagnostic value of nitrite test in comparison with urine culture (U/C) results in patients with Urinary tract infection (UTI) symptoms.

This cross-sectional study was performed on 203 patients with UTI symptoms. Middle urine sample was taken into sterile plastic containers, and simultaneously the urine sample and the nitrite test were done by the use of urine dipstick test. Data were analyzed using SPSS software version 23.

The results of the urine culture test indicated that the highest excreted organisms in both sexes were E. coli (58.8%), Candida (17.6%), Klebsiella (8.8%), E. coli (MDR) (5.9%), Pseudomonas (2.9%), Enterococcus (2.9%) and Acinetobacter (2.9%). The results showed that there was a significant correlation between U/C and urine analysis (U/A) test results (P = 0.01), and in U/C positive results, U/A results were significantly positive for UTI. Other findings showed a significant relationship between the results of nitrite one and nitrite two tests (P = 0.001). There was a significant correlation between urinary, and nitrite1 levels (P = 0.04). Also, in this study, the sensitivity and specificity of diagnostic tests for U/A and nitrite 1 and 2 with U/C were calculated as the Golden Standard method.

Overall, the results of this study showed that the negative nitrite test and urine dipstick test could be performed in emergency cases to prevent ectopic dysfunction and inadequate diagnosis. Also, it can reduce the unreasonable expenses for U/A.