Caseous Lymphadenitis Flashcards
1
Q
- bacteria responsible?
zoonotic?
- adult or young more affected?
- occurs in what two forms?
A
- corynebacterium pseudotuberculosis (gram + pleomorphic rod)
rarely
- adult (lifelong infection)
- external (superficial or cutaneous)
visceral (thin ewe syndrome): lungs, mediastinal/abdominal LN
2
Q
(2)
- how long does it persist in environment?
- transmission?
- passed on fomites?
A
- a long time (common disinfectants will kill)
- abscess fluid (aerosol if lung abscess) -> through skin (trauma) -> go to regional LN -> travel systematically
- yes
3
Q
(3 - abscesses)
- painful? odorous? thick exudate? before rupture what happens?
- can you get abscesses other places than LN?
A
- no, NO ODOR, yes, lose hair
- yesh
4
Q
(4)
- Cx of visceral?
- Cx of resp form?
3. how to collect for culture?
A
- wt loss, organ failure, neuro
- looks like pneumonia, sudden death
3. scrape inner wall - less bloody supply in middle of abscess so organisms less likely to be there
5
Q
(5 - Serology - SHI test)
- detects what?
- high titers (> 256) indicate what?
- can you diff vx from exposure?
- cause of false neg?
false pos?
- How does ELISA compare?
A
- Abs to exotoxin = active infection (good sens/spec)
- internal abscesses
(low hard to interpret 1:8 - 1:64)
- NO
- walled of abscesses/recent exposure
colostral Abs
- can dif vx and infection - beter than sero
6
Q
- what is a “clean herd”?
- what is an infeted herd?
A
- all vx young stock, all seroneg (test every 6 mo)
- seropos, Cx
7
Q
(vaccination)
- what type?
- neg effects?
- what kind of titers will they show?
A
- autogenous: not 100% effective
- make animal feel bad, decease milk production
- 1:8 - 1:16
8
Q
(tx)
- sx?
- will systemic abx work?
- lance and flush: avoid what? flush with what? need to isolate?
A
- only on external/superficial, won’t cure - only for show goat
- no (capsule, thick pus, intracellular org)
- spontaenous rupture, chlorhexidine/iodine, yes - for 30 days
