Infectious neurogical disease of the upper brain in cattle Flashcards Preview

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Flashcards in Infectious neurogical disease of the upper brain in cattle Deck (46)
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1

What are the clinical signs of rabies in cattle?

1. salivation
2. bellowing
3. aggressiveness
4. paresis/paralysis

2

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

3

What are the most common vectors of rabies in canada?

1. skunk
2. racoon

4

What is the incubation period of rabies?

2 weeks to months

5

How long is the clinical course of rabies?

5 days

6

What is the major vector of rabies in central america

vampire bat

7

What should you do if you suspect rabies

no longer a reportable disease to CFIA
Provincial responsibility
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)

8

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

9

What is pseudorabies?

aujeszky's disease

10

If you have pigs and cattle on the same farm and a weird cow, think of what

aujeszky's dz

11

When do you see meningitis in neonatal cavles?

with failure of passive transfer
depressed
recumbent
opsithotonus
septicemic usually

12

What is one of the most useful diagnostic tests for calves that seem to have meningitis?

plasma:

13

How is meningitis treated?

high dose antimicrobials (bactericidal, high Vd)
steroids--increased inflam with bacteria death
blood transfusion

14

What animals gets pituitary abscesses?

adult cattle

15

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)

16

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

17

What can you do for pituitary

not much
prolonged antibiotics but prognosis poor!!

18

What are the signs of listeria?

head tilt
circling
unilateral facial paralysisi

19

What causes listeria?

listeria monocytogenes

20

Where is listeria mostly found?

low quality silage

21

How does listeria get to the brain??

virus enters gingiva
ascends to brain stem through CN-V
microabscess formation CN VII and VIII

22

What is the treatment for listeria?

prolonged antibiotics (penicillin, oxytetracylcien)

23

How does histophilus somni cause neurological disease?

damage to vascular endothelium results in thrombosis of brain tissue

24

What are the clinical signs of histophilus somni

sleepy calf
sudden death

25

How is histophilus somni neuro dz treated?

early antibiotic

26

Does the vaccine work for histophilus somni neuro dz?

unproven. neuro form is no longer common

27

What is nervous coccidiosis?

a bizarre form of neurological disease associated with coccidiosis

28

Why have we seen some tetanus outbreaks?

tetanus has been taken out of many vaccines

29

What do you need to have botulism??

basically meat in fermented feed
or ducks dying of botulism in a pond and cattle dying

30

What does botulism cause?

progressive paralysis, starting with head.