Flashcards in Infectious neurogical disease of the upper brain in cattle Deck (46)
What are the clinical signs of rabies in cattle?
What is the progression of rabies in cattle?
rapid final progression 2-3 days from onset of signs. TRIGGER TO THINK OF RABIES! getting worse by hour
What are the most common vectors of rabies in canada?
What is the incubation period of rabies?
2 weeks to months
How long is the clinical course of rabies?
What is the major vector of rabies in central america
What should you do if you suspect rabies
no longer a reportable disease to CFIA
Contact public health
Isolate and observe animal
After death or euthanasia: Get brain and give to CFIA--if likelihood of human exposure (if not then to PDS)
What is aujeszky's disease?
swine herpes virus 1 that is shed in nasal secretions of the pig. if it gets innoculated into a wound on the bovine, get a very nasty disease with extreme pruritis, fever and death
What is pseudorabies?
If you have pigs and cattle on the same farm and a weird cow, think of what
When do you see meningitis in neonatal cavles?
with failure of passive transfer
What is one of the most useful diagnostic tests for calves that seem to have meningitis?
How is meningitis treated?
high dose antimicrobials (bactericidal, high Vd)
steroids--increased inflam with bacteria death
What animals gets pituitary abscesses?
Why do cattle get pituitary abscesses?
bacteria can easily localized in the region of the pituitary (portal system that has low pressure--bacteria can settle out)
What are the signs of pituitary abscess?
1. open mouth
2. protruding tongue
3. blind-pressure on optic chiasm
4. decreased milk production--hormones gone
What can you do for pituitary
prolonged antibiotics but prognosis poor!!
What are the signs of listeria?
unilateral facial paralysisi
What causes listeria?
Where is listeria mostly found?
low quality silage
How does listeria get to the brain??
virus enters gingiva
ascends to brain stem through CN-V
microabscess formation CN VII and VIII
What is the treatment for listeria?
prolonged antibiotics (penicillin, oxytetracylcien)
How does histophilus somni cause neurological disease?
damage to vascular endothelium results in thrombosis of brain tissue
What are the clinical signs of histophilus somni
How is histophilus somni neuro dz treated?
Does the vaccine work for histophilus somni neuro dz?
unproven. neuro form is no longer common
What is nervous coccidiosis?
a bizarre form of neurological disease associated with coccidiosis
Why have we seen some tetanus outbreaks?
tetanus has been taken out of many vaccines
What do you need to have botulism??
basically meat in fermented feed
or ducks dying of botulism in a pond and cattle dying