Canine Fucosidosis

Category: Nervous System & Behavioral
Breeds documented: 1
Published sources: 5

Overview

Without enough of the enzyme alpha-L-fucosidase, certain sugar-containing materials build up inside cells. This is called a lysosomal storage disease, because the cell's recycling system cannot break the material down normally. Fucosidosis gradually damages the nervous system, affecting movement, behavior and learned skills. Dogs may seem well early in life before developing signs that worsen over time.

Signs to watch for

Stumbling or unusually high steps
Standing with the feet unusually far apart
Head tremors
Difficulty swallowing
Loss of previously learned behavior
Changes in behavior or awareness

Signs develop in young dogs after an early period without obvious illness; reported timing varies.

Emergency Call a vet immediately if your dog starts staggering.

Diagnosis and tests

A vet may suspect fucosidosis from progressive neurological changes and then request specialized testing. Measuring alpha-L-fucosidase activity in blood or cultured skin cells can confirm the enzyme deficiency. A DNA test for the known FUCA1 variant in English Springer Spaniels can identify affected dogs and carriers.

Breeds with documented risk

1 breed

By breed size

1 Medium

English Springer SpanielMedium · Sporting Group

Inheritance

Not yet known
None of the sources we use states how this is inherited in dogs yet.

We've gathered what published sources say about this condition, so you can talk it through with your vet. It isn't veterinary advice: you and your vet know your dog best.