Neurologic Diseases of Ruminants Flashcards
which cranial nerves are involved in the menace response?
cranial nerves II and VII
what causes cerebellar hypoplasia?
pestivirus
BVDV in cattle
border disease virus in small ruminants
what is the incubation period of rabies?
3 weeks to 6 months
what is polioencephalomalacia?
necrosis of the grey matter
what are the signs of polioencephalomalacia?
cerebral signs:
star-gazing
altered mentation
blindness with intact PLR
what are the risk factors for thiamine deficiency?
hypo/anorexia
poor roughage diet
ingestion of thiaminases
what does excess sulfur inhibit?
mitochondrial electron transport chain
what can be seen on a blood smear with lead toxicity?
anemia with RBC basophilic stippling
what are the common causes of salt toxicity?
inappropriate milk replacer without free choice water
high salinity well water/softeners
inaccessible water sources
what are the clinical signs of hypomagnesemia?
aggression
seizures
facial twitching
what are the three important mechanisms of bacterial meningoencephalitis?
general sepsis associated
Histophilus somni associated thromboembolic meningoencephalitis
Chlamydophila pecorum biotype 2
what is the pathophysiology of bacterial meningoencephalitis Histophilus somni?
part of bovine respiratory disease complex
thromboembolic vasculitis- polyserositis
what is mad cow/transmissible spongiform encephalopathies/prion?
bovine spongiform encephalopathy
is Listeriosis zoonotic?
yes
how is vitamin A derived?
from fresh green grass and stored in liver
