The Cocker Spaniel is one of the most popular dog breeds in the UK and so it is unsurprising that a number of inherited diseases have been reported over the years in this breed including Progressive Retinal Atrophy (PRA), Retinal Dysplasia (RD) and Retinopathy with Vitamin E Deficiency (RVED). A DNA test for PRA (prcd) has been available for a long time and so this disease is now, fortunately, very rare in this breed. Very recently, the Canine Genetics Centre has also solved the cause of RVED in this breed and so, with the use of DNA testing, this disease should be easy to eradicate in a few generations. Continue reading
Tag: Multiocular defect (MOD)
Mutation responsible for multiocular defect in the Old English Sheepdog identified
In 2017, as part of the Give a Dog a Genome project, we sequenced the genome of an Old English Sheepdog (OES) that had been diagnosed with hereditary cataracts under the BVA/KC/ISDS Eye Scheme. This was the start of a project that turned out to be a lot more complex than we initially thought it would be, and that was disrupted by both covid and our move from the Animal Health Trust to the University of Cambridge, but that we finally concluded at the end of last year. Continue reading
Multiocular defect in Old English Sheepdogs
In recent years multiple dogs of the Old English Sheepdog (OES) breed have been diagnosed with an ocular (eye) disease that can affect multiple parts of the eye and is therefore known as multiocular defect (MOD). Most affected dogs suffer from cataracts, but additional abnormalities can include any of the following:
- microphakia (small lens),
- lens coloboma (a hole in the lens),
- macrophthalmos (enlarged globe),
- retinal detachment,
- vitreopathy and
- retinal degeneration
