Cystinuria Type III

Cystinuria Type III is a hereditary disease which can be tested with a DNA test. Cystinuria is an inherited metabolic defect of amino acid transport in which cysteine, ornithine, lysine, and arginine are transported abnormally in kidneys and intestine. Normally cystine is filtered in renal glomerulus and then reabsorbed back to blood in tubules. This has an effect that only low concentration of cystine is found in urine. Dogs with cystinuria do not absorb cystine in kidney tubules therefore they have abnormally high urine concentrations of cystine. Cysine is not soluble in alkaline or neutral pH, therefore its excess in urine forms crystals that lead to formation of cystine stones in kidney or bladder. Affected dogs often have inflammation of urinary system and have increased risk for urinary blockage which leads to kidney failure, rupture of bladder and death if not treated immediately. In English and French bulldogs three mutations in two different genes were associated with the development of cystinuria. One mutation is inherited in incompletely recessive manner, which means that also heterozygous animals can develop the disease.

Inheritance: autosomal recessive and autosomal incompletely recessive

Mutation: SLC3A1 and SLC7A9 gene

Genetic test: The method used for genetic testing is extremely accurate and allows complete differentiation between affected animals, carriers and healthy dogs. DNA testing can be done at any age.

Disease control: read more

DNA test sample: EDTA whole blood (1.0 ml) or buccal swabs. Detailed information about sampling can be found here.


48.80 €

  • You can order free sampling kit.
  • Only one sample is required for each animal, even if you order several tests.
  • Samples are stored for the option to order additional tests.
  • We offer expert assistance in interpreting the results.
It appears you are using an older browser we don't support fully! For better and user friendly experience use one of the following internet browsers or update your current browser to the latest version.