BLACKLEG Flashcards
what amendment is the second priority dz
DA AO No 17
known as clostridial myositis
blackleg
agent of true blackleg
Clostridium chauvoei
agent of false blackleg
C. septicum and C. novyi
false blackleg other accurate term
malignant edema
blackleg is a ___borne infection
soil
charac of c. chauvoei
g-
spore forming
function of spore
survival in envt
organs affected in blackleg
spleen, liver, alimentary tract
t.f Recovered animals of blackleg are immune to subsequent attacks
t
t/f blackleg can be transmitted via open wound
t
Presence of infectious agents to the blood
pyrexia
endospore deposits in
muscle
Endospore deposits in the muscle
__ → activation of spores
Immunosuppression
pathogenesis of blackleg
Ingestion
↓
Enters the blood stream
Presence of infectious agents to the blood → pyrexia
↓
Endospore deposits in the muscle
Immunosuppression → activation of spores
↓
Anaerobic condition occurs (bruise)
↓
Sporulation and toxin formation
↓
Myositis & necrosis of muscle
blackleg is more common in ___ than in ___
sheep than cattle
___ → putrefaction of stomach contents
Absence of motility
Usually endogenous infection (no wounds or trauma) but can also have wound infections
cattle
in cattle, there is no fever if infection is due to wound
t
animal also prone to blackleg
buffaloes
diagnostic tech for blackleg
Bacteriology - muscle; impression smear of freshly cut lesion
Place in air-tight container
Histology - fixed samples of suspected muscle lesion
-Necropsy & Cs
-Isolation
fluorescent antibody test (FAT)
vaccine for blackleg
polyvalent bacterin
The primary source of reinfection of a herd with blackleg is:
Animals dying of blackleg
1st choice antibiotic for blackleg
penicillin 4000-8000 IU/kg IM for 4-5 days
