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Congenital Myasthenic Syndrome (Jack Russell Terrier Type) Overview

Congenital Myasthenic Syndrome (Jack Russell Terrier Type)
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Category: Neurologic (Associated with the Brain, Spinal and Nerves)

Gene: CHAT

Variant Detected: Deletion

Severity: Scale 4 has a high degree of severity. It generally causes a decreased quality of life and may also decrease the life expectancy.

Mode of Inheritance: Autosomal Recessive

Test Overview: Characteristics of congenital myasthenic syndrome Labrador retriever type are fatigable weakness of skeletal muscle. The weakness is a result of a defect in the synthesis of the neurotransmitter acetylcholine. Affected dogs are able to run normally for 5 to 30 minutes. Shortly after, dog’s strides become shorter and shorter, eventually resulting in a collapse. The dog recovers after some minutes of rest, and is able to walk or run for a certain period of time, before the symptoms’s reappearance. The first symptoms usually occur between 12 to 16 weeks of age, but it can vary between breeds. Congenital myasthenic syndrome symptoms appear similar to myasthenia gravis. But while myasthenia gravis is an autoimmune, CMS is an inherited disease caused by gene mutation.

Research Citation(s): http://jhered.oxfordjournals.org/content/98/5/539.full.pdf+html

Associated Breed(s): Jack Russell Terrier,  Mixed Breed,  Australian Terrier,  Parson Russell Terrier,