Adult Small Ruminant 1

Question 1

what is causative agent of caseous lymphadenitis

Answer 1

Corynebacterium pseudotuberculosis

Question 2

how to confirm diagnosis of caseous lymphadenitis at an individual and herd level

Answer 2

individual: culture of abscesses
herd: synergistic hemolysin inhibition test

Question 3

what is treatment for external vs internal abscess of caseous lymphadenitis

Answer 3

external abscess: cull***, isolation and lancing of abscesses using iodine 307%, chlorhex 2%, or surgical excision for valuable animals
internal abscess: cull

Question 4

you cut into a lump on a sheep neck and see this. what is it?

Answer 4

this is a caseous lymphadenitis external abscess

Question 5

what is the most common clinical presentation of caseous lymphadenitis

Answer 5

internal abscesses (abscesses are in internal organs and LNs) are more common than external abscesses (peripheral LNs near skin)

Question 6

what are at least 3 control methods for caseous lymphadenitis

Answer 6

• Purchase from CLA free flock
• Provide own shearing equipment/disinfect
• Control of external parasites
• Isolation prior to rupture of abscess
• Shear affected last, younger animals first
• Test and cull: S.H.I. test and ELISA
• Vaccinate entire flock if cannot be controlled

Question 7

what are the 4 clinical forms of