Dermatology Flashcards
What bacteria causes Caseous Lymphadenitis?
Corynebacterium pseudotuberculosis
Caseous lymphadenitis affects internal and external lymph nodes, causing abscesses. Which LN is particularly affected?
Parotid
How is Caseous Lymphadenitis diagnosed?
Culture of C. pseudotuberculosis
ELISA
What is the treatment for Caseous Lymphadenitis?
None- cull affected sheep
How is Caseous Lymphadenitis controlled?
Test and cull
Biosecurity
Purchase low risk lambs
Cellulitis is usually secondary to…
Wounds or injection abscesses
What causes Orf (contagious pustular dermatitis?)
Parapox virus
Zoonotic
Orf mainly affects the face of lambs, but can affect ewes. Where does it typically present in ewes and why is this a problem?
Teats
Predisposes to mastitis, painful sucking - can cause poor lamb growth and death
What is the treatment for orf?
No treatment
Antibiotics for secondary infections only
How can orf outbreaks be controlled?
Vaccine (live - only use on infected farms)
What pathogen causes Lumpy Wool?
Dermatophilus congolensis
Lumpy Wool causes crusty lesions, wool loss and pruritis. What weather and sheep is it associated with?
Wet weather (especially post-shearing) Thin-wooled breeds
What is the treatment for Lumpy Wool (Dermatophilus congolensis)?
Penicillin
What pathogen is involved with periorbital eczema?
Staph aureus
Periorbital eczema is spread by contact and feeding troughs.. How is it treated?
Penicllin
