Negative Result Urine Test. False-negative bilirubin reagent strip results are often due to testing a specimen that is not fresh. That is much lower counts of bacteria in the urine can indicate a UTI.
A negative result while initially simple to understand can be more complicated and requires the clinician to be aware of several factors that can cause the urine sample to test negative for a compound. Blood glucose level may be anywhere between 0 to 160 mgdl with a negative urine glucose test. That is much lower counts of bacteria in the urine can indicate a UTI.
Negative means that the concentrations in the urine sample are below the designated cut-off levels for a particular drug tested.
Results of this test will be considered along with a microscopic examination for WBCs in the urine. Hence one cannot differentiate on basis of a negative urine glucose test between low normal or a mildly elevated blood glucose level. Indoxyl sulfate indican can produce a yellow orange-to-red color response which may interfere with the interpretation of a positive or negative reaction. Urine cultures report the amount of bacteria in the urine and usually only report 100000 colonies groups of bacteria per ml of urine or more.