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27 Cards in this Set
- Front
- Back
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What is the relative size of Picornavirus what is its Stability and are there inclusion bodies?
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Smallest virus!
Very stable No IBs |
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How do Picornaviruses effect host cells?
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Cause rapid cell death
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How is stability related to transmission?
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Higher degree of vector transmission
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T/F
There is cross protection between serotypes of Picornaviruses? |
false
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What is the etiological agent of Foot and mouth disease?
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Aphthovirus
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Who are the hosts of Foot and mouth? What about horses?
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All cloven-hoofed animals
Horses are genetically resistant |
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What are the modes of transmission for foot and mouth disease?
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*Inhalation
ingestion mechanical |
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Do you see viremia with Foot and mouth disease?
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Yes!
virus sheds 24 hrs prior to appearance of clinical signs |
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In what part of the body is foot and mouth disease inactivated 48 hrs after slaughter? Where does it survive longer?
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The muscle
Bone marrow, viscera, blood clots |
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What is "Tiger Heart" indicative of?
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foot and mouth disease
can cause death in young animals = myocardial infarction |
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What is the mortality of foot and mouth disease?
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Low in adults
High in neonates |
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Who do you see a carrier state in with Foot and mouth disease? Length?
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Cattle & sheep (none in swine!)
2yrs in cattle, 6 mo. sheep |
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What is the main clinical sign of Foot and mouth disease?
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Vesicular lesions
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Do you see abortion in foot and mouth disease?
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Yes, but due to effects on mom not fetus
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Is there a vaccine available for foot and mouth disease? What is length of immunity?
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Yes, in endemic countries but the immunity isn't lifelong
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What Picornovirus is similar to Pseudorabies?
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Porcine Enteroviral Encephalomyelitis
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What is Porcine Enteroviral Encephalomyelitis aka and what is the etiological agent?
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Teschen Disease
Porcine teschovirus |
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What is the etiology of Avian Encephalomyelitis/Epidemic tremor?
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Avian enterovirus
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Who does Avian Encephalomyelitis effect?
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Chickens 1-3 wks
-infected breeder hen can pass virus to eggs |
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Are there gross lesions associated with Avian Encephalomyelitis or Teschen?
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No, only visible on histo.
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Who does Encephalomyocarditis effect as a significant pathogen?
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Pigs
SMEDI |
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Who is the natural host of Encephalomyocarditis? Etiology?
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Rodents
Cardiovirus |
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How do you diagnose Encephalomyocarditis?
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Pathognomonic cardiac lesions in right ventricle
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What acts as an effective disinfectant for foot and mouth and why?
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Sodium hydroxide, sodium carbonate, citric or acetic acid
It's pH stable b/w 6-9 |
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What are the other vesicular diseases that foot and mouth must be distinguished from?
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Vesicular stomatitis
Vesicular exanthema Bluetongue Rinderpest Swine vesicular disease BVD-MD |
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How is the gut epithelium effected in Porcine Enteroviral Encephalomyelitis/Teschen disease? Do you see gross lesions at necropsy?
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No destruction of gut epithelium
No |
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What is the only Picorna virus that hemagglutinates?
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Encephelomyocarditis
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