A routine urine test that reveals a negative urinary nitrite is normal. A positive result for nitrite in the urine often suggests the presence of a urinary tract infection in the patient. Nitrite is a metabolic waste formed by Gram-negative bacilli in the process of metabolism, when the urine if the proportion of nitrite in the urine is significantly elevated, it indicates that there may be an infection of Gram-negative bacilli in the urine, and there are no bacteria in the urine of normal people. If elevated nitrites in the urine are found during a routine urinalysis, this suggests the presence of a bacterial infection in the urine, indicating that the patient may have a bacterial infection in the urinary tract that requires treatment. For the treatment of urinary tract infections, the most common types of antibiotics used are quinolones, and you can also choose phosphomycin or triple cephalosporin treatment.