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Interpret Your Urine Nitrites Results
Enter your Urine Nitrites value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
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Urine Nitrites Normal Ranges
Urine nitrites are produced by bacterial reduction of dietary nitrates to nitrites — a metabolic activity of most Gram-negative bacteria (E.
| Reference Range | Unit | Notes |
|---|---|---|
| Negative / Non-reactive | qualitative | Negative = normal; Positive = bacteria likely present |
Common Causes of High Urine Nitrites
UTI caused by nitrate-reducing Gram-negative bacteria: E. coli (most common cause of UTI), Klebsiella pneumoniae, Proteus mirabilis, Enterobacter, SalmonellaAsymptomatic bacteriuria (especially in elderly and pregnant women)
Common Causes of Low Urine Nitrites
Negative nitrites do not exclude UTI — organisms that do not reduce nitrates (Enterococcus, Staphylococcus saprophyticus, Candida, Pseudomonas) cause UTI with negative nitriteInsufficient bladder dwell time (<4 hours between voids — nitrate not converted if urine passes through too quickly)Low dietary nitrate intake
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