Canis ISSN: 2398-2942

Urinalysis: nitrate

Contributor(s): Kathleen P Freeman

Overview

  • Not a useful test in dogs; large numbers of false negatives.
  • In humans, increased nitrate correlates well with urinary tract infections.
  • Nitrate in urine reduced to nitrite by nitrate reducing bacteria.

Sampling

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Tests

Methodologies

  • Immerse dipstick in urine until wet.
  • Remove and shake off excess urine.
  • Hold horizontally to avoid run-off between pads.
  • Read test at correct time interval.

Availability

  • All veterinary practices.
  • External laboratories.

Validity

Sensitivity

  • Negative result does not preclude diagnosis of urinary tract infection.

Specificity

  • A positive result on FRESH urine sample suggests presence of bacterial infection.

Result Data

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Further Reading

Publications

Refereed papers

  • Recent references from VetMedResource and PubMed.
  • Brobst D (1989) Urinalysis and associated laboratory procedures. Vet Clin North Am Small Anim Pract 19(5), 929-949.
  • McCaw D L, Fleming E J & Mikiciuk M G (1989) Interpreting the results of urinalysis - a key to diagnosing renal disorders. Vet Med 84(3), 281-286.

Other sources of information

  • Kaneko J J (1997) Clinical Biochemistry of Domestic Animals. 5th edn. Harvey J W & Bruss M L (eds). Academic Press, Boston.
  • Duncan J R, Prasse K W & Mahaffy E A (1994) Veterinary Laboratory Medicine Clinical Pathology. 3rd edn. Iowa University Press, Ames, Iowa.


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