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Canine Multifocal Retinopathy CMR1 (Coton de Tulear Type)

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Test Overview:

Multifocal retinopathy 2 is an inherited disorder of the Retina affecting dogs. Affected dogs typically present around 15 weeks of age with multiple discrete circular areas of retinal detachment with underlying fluid accumulation that are visible on an eye exam performed by a veterinarian. These blister-like lesions are typically found in both eyes and can appear gray, tan, orange or pink and vary in number, size and location. Progression of retinal changes is usually slow and new lesions are not noted after 6 to 12 months of age. Occasionally as affected dogs age, lesions appear to heal and are no longer visible on an eye exam. Generally the dog’s vision is not affected although vision loss has been described in some cases of multifocal retinopathy 2.

Category:

Ophthalmologic - Associated with the eyes and associated structures

Gene:

Bestrophin 1 (BEST1) on chromosome 18

Variant Detected:

chr18:54476143 (canFam3): G>A

Severity:

Low-Moderate. This disease can cause some discomfort and/or dysfunction in the affected animal. It does not generally affect life expectancy.

Mode of Inheritance:

Autosomal Recessive

Research Citation(s):

Guziewicz KE, Zangerl B, Lindauer SJ, Mullins RF, Sandmeyer LS, Grahn BH, Stone EM, Acland GM, Aguirre GD. Bestrophin gene mutations cause canine multifocal retinopathy: a novel animal model for best disease. Invest Ophthalmol Vis Sci. 2007 May; 48(5):1959-67. [PubMed: 17460247] Zangerl B, Wickström K, Slavik J, Lindauer SJ, Ahonen S, Schelling C, Lohi H, Guziewicz KE, Aguirre GD. Assessment of canine BEST1 variations identifies new mutations and establishes an independent bestrophinopathy model (cmr3). Mol Vis. 2010 Dec 16; 16:2791-804. [PubMed: 21197113]

Associated Breed(s):

Coton De Tulear, Mixed Breed,

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