Canine Myasthenia Gravis: Neuromuscular Welfare

Key Welfare Facts

Myasthenia gravis causes failure of neuromuscular transmission due to autoantibodies against acetylcholine receptors.
Signs include episodic muscle weakness that worsens with exercise and megaoesophagus causing regurgitation.
Aspiration pneumonia from regurgitation is the leading cause of death and represents a serious welfare emergency.
Treatment with pyridostigmine improves neuromuscular transmission and reduces weakness in most affected dogs.
Spontaneous remission occurs in up to 50% of cases within 6-18 months, offering hope for long-term management.
Bailey chair feeding and food consistency modification are essential welfare management tools for megaoesophagus.

Welfare Assessment

Myasthenia gravis requires dedicated management to prevent the life-threatening complication of aspiration pneumonia. Upright feeding, appropriate food consistency, and regular monitoring for respiratory signs are essential alongside medical treatment.

What You Can Do

Implement upright feeding using a Bailey chair for dogs with megaoesophagus associated with MG
Seek prompt veterinary assessment for any signs of respiratory distress or coughing after eating
Monitor muscle strength regularly and report changes to guide medication dose adjustments
Discuss immune-mediated therapy for dogs that do not achieve remission with symptomatic management