Urine nitrite

Through many details in film and television works, we have learned about nitrite and know that nitrite is a harmful substance. There is nitrite in the leftovers of the food we often eat, and there is nitrite in unfresh raw vegetables. Many vegetables also produce nitrite during the pickling process. Long-term consumption of nitrite will not only cause harm to the human body, but may even endanger human life.

What does urine nitrite mean? Is it that the nitrite in food is excreted from the body through urine? No, urine nitrite is a urine test item. A negative urine nitrite means that the urinary tract may be normal, and a positive urine nitrite means that your urinary tract is infected.

Some urinary tracts contain Gram-negative bacteria that reduce nitrates, a product of protein metabolism in urine, to nitrites. Therefore, determining whether there is nitrite in urine can quickly and indirectly determine the status of urinary tract bacterial infection. Clinically, the incidence of urinary tract infection is high, and sometimes the infection is asymptomatic, especially in female patients. Diagnosis of urinary tract infection requires urine bacterial culture, which takes a long time and certain conditions. However, qualitative analysis of urine nitrite can quickly produce a result. The positive rate depends on whether the urine remains in the bladder for more than 4 hours, and the positive rate can reach 80%. A positive result indicates that the number of bacteria in the urine is more than 100,000/ml. Positive results of urine nitrite are commonly seen in: pyelonephritis caused by Escherichia coli, the positive rate of which accounts for more than two-thirds of the total; symptomatic or asymptomatic urinary tract infections, cystitis, bacteriuria, etc. caused by Escherichia coli and other Enterobacteriaceae.

As mentioned above, if urine nitrite is positive, there must be bacterial infection in the urinary tract, which includes the kidneys, ureters, bladder, and urethra. A negative urine nitrite test does not mean that there is no bacterial infection. In daily life, everyone should pay attention to personal hygiene, take a bath and change underwear frequently. After washing, the underwear should be exposed to the sun to sterilize.