Equine Pemphigus Foliaceus: Welfare and Long-Term Management

Pemphigus foliaceus is the most common autoimmune skin disease of horses, causing painful crusting lesions that require long-term immunosuppressive management with significant welfare implications.

Key Facts

Equine pemphigus foliaceus causes widespread crusting and scaling of the skin
Lesions are most common on the face, lower limbs, and dorsum
Diagnosis requires skin biopsy and histopathology showing intraepidermal pustules
Treatment with corticosteroids is effective but carries risks of laminitis in horses
Some cases are triggered by drug reactions or environmental factors

Welfare Considerations

Pemphigus foliaceus causes chronic pain and pruritis from widespread skin inflammation, significantly reducing horse welfare and willingness to work. The condition frequently causes secondary infections in eroded skin areas. Long-term corticosteroid treatment carries a significant risk of iatrogenic laminitis, creating a treatment welfare dilemma. Management through lowest effective corticosteroid doses, environmental trigger identification, and supportive skin care minimises both disease and treatment welfare impacts.

What You Can Do

Seek veterinary dermatology assessment if your horse develops widespread crusting skin lesions
Follow evidence-based treatment protocols that minimise corticosteroid dose and duration
Monitor hooves and digital pulses carefully throughout treatment for laminitis warning signs
Maintain excellent skin hygiene and treat secondary infections promptly
Investigate potential trigger factors including recently administered drugs and environmental changes