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28 Cards in this Set
- Front
- Back
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Is porcine parvovirus enveloped or non-enveloped?
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Non-enveloped
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What is SMEDI?
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Porcine reproductive disease complez
Still birth Mummification Embryonic Death Infertility |
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True or false: Porcine parvovirus is frequently isolated from healthy pigs
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True
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Clinical signs of porcine parvovirus
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Sows: Asymptomatic
Fetuses: -Early: Abortion, reabsorption 50-60 days: Abortion, mummification 72 days on: Survival possible, born weak |
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What histopathological lesions are unique to porcine parvovirus?
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None
(Nonspecific perivascular cuffing, meningoencephalitis, interstitial hepatitis, nephritis) |
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How is porcine parvovirus presumptively diagnosed?
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CS, epidemiology, necropsy
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How is porcine parvovorus definitively diagnosed?
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PPV antigen by FA in tissue section
Virus isolation in susceptible cells |
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How is porcine parvovirus prevented?
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Vaccinate sows with MLV or killed vaccines to prevent transplacental infection
Difficult to inactivate/eliminate PPV! |
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How do PRV and PHV-1 differ?
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They are the same virus
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What disease does pseudorabies virus cause?
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Ajuesky's disease, "mad itch"
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How is PRV unique among the herpesviruses?
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More resistant to temperature and pH than most other herpesvirus.
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Natural reservoirs of PRV
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Swine, usually enzootic
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How is pseudorabies virus acquired?
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Oro-pahryngeal tissues via breathing, feeding, social activity
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What tissues are infected by pseudorabies virus?
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CNS and nerve tracts from which virus moves centripetally
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What are the main signs of pseudorabies virus?
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Interstitial pneumonia
Fever Salivation Depression Tremors Convulsion |
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What does pseudorabies cause specifically in the pregnant sow?
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SMEDI
Abortion, reduced fertility (low farrowing rate) |
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When a nursing piglet acquires pseudorabies virus, what signs are seen? What is the mortality?
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Fever, paralysis, uncommonly coma
60-80% mortality |
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PRV resides in these cells when latent.
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Sensory ganglia of brain or CNS
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This virus recrudesces when a pig is under stress or traumatic conditions
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Pseudorabies virus
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When PRV recrudesces, does the pig shed the virus? Does he show CS?
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Sheds virus without CS
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List some external lesions that may be seen in pigs with pseudorabies virus.
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Herpetic vesicles of snout and face
Raw areas on ears and shoulders |
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How does PRV affect non-porcine species?
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Fatal but not contagious in cattle, sheep, dogs, cats, other species. Few cattle recoveries only.
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What are CS of pseudorabies in non-porcine species?
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Severe pruritus followed by rabies like symptoms
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Does PRV spread between cattle?
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No, only from swine to cattle or through rat bites
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List some external lesions that may be seen in pigs with pseudorabies virus.
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Herpetic vesicles of snout and face
Raw areas on ears and shoulders |
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How does PRV affect non-porcine species?
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Fatal but not contagious in cattle, sheep, dogs, cats, other species. Few cattle recoveries only.
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What are CS of pseudorabies in non-porcine species?
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Severe pruritus followed by rabies like symptoms
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Does PRV spread between cattle?
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No, only from swine to cattle or through rat bites
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