88. Congenital skin diseases in swine

Question 1

What are the Main Congenital skin diseases in swine?

Answer 1

• Epitheliogenesis imperfecta
• Dermatosis vegetans
• Pityriasis rosea

Question 2

Describe Epitheliogenesis imperfecta?

Answer 2

Epitheliogenesis imperfecta

• Congenital hypoplasia of the skin on certain areas

o Legs, flanks, spine

• Usually, unhealthy litters only affect one animal at a time
• Euthanasia in case of extensive skin imperfection, even without significant skin imperfection

Question 3

Describe dermatosis vegetans?

Answer 3

Dermatosis vegetans
• Landrace, recessive trait
• Growing lesions, first papules, the plaques, finally papillomatosis-like lesions, club feet
• Apparent at 3 weeks after birth, most piglets die by week 6
• Survivors have interstitialis pneumonia with giant cells

Question 4

Describe Pityriasis rosea?

Answer 4

Pityriasis rosea

• Sporadic, unknown origin, genetic background (landrace?)
• Multiple piglets from the same litter can be affected
• Manifests at 8-14 weeks of age
• Lower abdomen and chest, inner thighs, sometimes on the back, neck, and legs
• First small erythematous papules, which rapidly expand to form a ring (collarette) with distinct raised and

reddened borders, center of the lesion is flat and covered with a bran-like scale (pityriasis)

• No pruritus, spontaneous healing, but secondary infections can occur

o S. hyicus

• Usually no need for treatment, but prevent secondary infection