False-positive nitrite results may occur when urine specimens have remained at room temperature for an extended period of time, allowing bacterial contaminants to multiply and produce measurable levels of nitrites.
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What does negative nitrite mean?
We believe that the cause of nitrite-negative results is a lack of dietary nitrate, dilution of urine and exogenous interference (e.g. ascorbic acid). These findings support the idea that standard urine culture is necessary to rule out UTI. Keywords: nitrite; urinary tract infection; urine dipstick test.
Should nitrite be negative?
In healthy people, both the urinary nitrite testnitrite testA nitrite test is a standard component of a urinary test strip. A positive test for nitrites in the urine is called nitrituria. This test is commonly used in diagnosing urinary tract infections (UTIs).https://en.wikipedia.org › wiki › Nitrite_testNitrite test – Wikipedia and the leukocyte esteraseesteraseAn esterase is a hydrolase enzyme that splits esters into an acid and an alcohol in a chemical reaction with water called hydrolysis. A wide range of different esterases exist that differ in their substrate specificity, their protein structure, and their biological function.https://en.wikipedia.org › wiki › EsteraseEsterase – Wikipedia (LE) tests are negative. A negative nitrite test does not necessarily mean that the urine is free of all bacteria, particularly if there are clinical symptoms, because some bacteria do not produce nitrites.
What causes positive nitrites in urine?
So, if you have nitrites in your urine, it usually means that you have a urinary tract infection (UTI). UTIs are one of the most common types of infections, especially in women. Most UTIs affect the bladder and urethra (the tube that carries urine out of your body).Aug 3, 2022
What does nitrite positive mean?
So, if you have nitrites in your urine, it usually means that you have a urinary tract infection (UTI). UTIs are one of the most common types of infections, especially in women. Most UTIs affect the bladder and urethra (the tube that carries urine out of your body). Fortunately, most UTIs are not serious.Aug 3, 2022
Can you have positive nitrites without UTI?
Urine dipstick tests for nitrites aren’t always reliable. While a positive test result is often an indication of a UTI, a negative result isn’t 100% reliable. This may be because not all infection-causing bacteria change nitrates into nitrites or produce nitrite enzymes.Nov 1, 2022
What can cause positive nitrites?
Bacteria in the urinary tract turn nitrates into nitrites, creating nitrite-positive urine. Nitrites in urine (nitrituria) only occur when you have a urinary tract infection (UTI). A urinalysis detects nitrites in urine.Nov 1, 2022