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32 Cards in this Set
- Front
- Back
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what is unique about reoviridae
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3 capsid layers
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how is bluetongue transmitted?
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Culicoides (bio);
Culicoides variipennis var sonorensis |
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what is another name for bluetongue?
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soremuzzle
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bluetongue can infect...
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sheep and white tailed deer
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t/f: bluetongue is noncontagious
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TRUE
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bluetongue replicates in which cells
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hematopoietic and endothelial cells
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does bluetongue cause viremia?
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yes
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can bluetongue cause abortion
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yes
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what is the reservoir and amplification host of the rotavirus?
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cattle
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African Horse sickness is caused by what etiologic agent?
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equine orbivirus
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what can african horse sickness infect?
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horses, donkeys, mules, DOGS (after ingestion of meat)
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pathogenesis of african horse sickness?
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Culicoides bite, replicates in LNs, 1' viremia, leads to infection in reticuloendothelial system (MOs etc), which leas to 2' viremia and then vasculitis
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2 forms of african horse sickness?
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pulmonary: MORE DEADLY
cardiac |
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describe the pulmonary form of African Horse Sickness
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MORE DEADLY than cardiac - mortality 95%;
fever, frothy discharge, blockage of airway, pulmonary edema; also leads to *edema of supraorbital fossa* |
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describe the cardiac form of African Horse Sickness
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mortality 70%;
edema of head, hydropericardium and hemorrhage of myocardium ascites |
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transmission of african horse sickness?
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Culicoides;
dogs get from ingestion of horse meat |
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genus rotavirus belongs to which family?
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reoviridae
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rotavirus causes enteritis where?
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small intestine
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rotaviruses are divided into serogroups based on
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VP6 antigen
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serotypes of rotaviruses are divided based on
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glycoprotein VP7 and spike protein VP4
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what does vp4 do?
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rotavirus;
protease sensitive protein - inhibits viral attachment (split into VP5-binds and VP8- penetrates) |
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what does VP7 do?
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rotavirus;
glycoprotein; aids in uncoating |
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which 3 proteins does Rotavirus have?
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VP4, VP6, VP7
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what causes "white scours" or "milk scours" ?
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Rotavirus
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how is Rotavirus transmitted?
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ingestion of contaminated food, water, fomites
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can rotavirus be transmitted through inhalation?
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no
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which Ab is most useful in rotavirus infections?
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IgA
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etiologic agent of Viral Arthritis?
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avian reovirus
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viral arteritis and tenosynovitis primarily occurs in
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meat-type chickens (broilers) 4-8 weeks
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how is viral arteritis and tenosynovitis transmitted?
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fecal-oral route;
transovarial; aerosol |
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does viral arteritis and tenosynovitis cause viremia?
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yes;
but targets hock joint |
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what does viral arthritis and tenosynovitis lead to?
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swelling of hock;
chronic tendonitis= rupture of gastrocnemius tendon |
