Myasthenia Gravis
Myasthenia gravis is a neuromuscular disorder causing episodic muscle weakness due to impaired transmission at the neuromuscular junction.
Detailed Description
In dogs, myasthenia gravis is most often an acquired autoimmune disease where antibodies target acetylcholine receptors, impairing nerve-muscle communication. It causes exercise-induced weakness and can lead to life-threatening complications if untreated.
Common Symptoms
- Exercise-induced weakness
- Regurgitation
- Collapse after activity
Management Options
- Anticholinesterase medications
- Immunosuppressive therapy
- Management of aspiration pneumonia
Frequently Asked Questions
Is myasthenia gravis inherited?
No, the acquired form is not inherited.
What are the first signs?
Weakness after exercise and possible regurgitation.
Can dogs recover?
Many improve with treatment, but relapses can occur.
Is it common in this breed?
More common than in most breeds, but still rare overall.
How is it diagnosed?
By blood tests for acetylcholine receptor antibodies.
Condition Details
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Typical Age of Onset
1–4 years or older (bimodal distribution)
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Testing Available
Yes
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Diagnosing Methods
Acetylcholine receptor antibody titers; Electromyography; Edrophonium response test
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Related Conditions
Polymyositis, Tick paralysis