Term
| Reoviridae Characteristics |
|
Definition
R-respiratory; E-enteric; O-orphan
non-enveloped, medium sized, dsRNA
10-12 segmented RNA
inner and outer nucleocapsid |
|
|
Term
| Orbivirus Characteristics |
|
Definition
Reoviridae Arbovirus
pH labile, very stable in protein
dsRNA; 10-12 segmented RNA |
|
|
Term
| Rotavirus Characteristics |
|
Definition
Reoviridae
pH stable
dsRNA; 10-12 segmented RNA
outer capsid added in RER
major enteric disease |
|
|
Term
|
Definition
receptor mediated endocytosis
short incubation period |
|
|
Term
| Reoviridae Replication and Release |
|
Definition
in cytoplasm
outer capsid formation depends on host protease cleavage
cytolysis |
|
|
Term
|
Definition
mucosal epithelium
lymphocytes (some viruses)
neurons (some viruses) |
|
|
Term
|
Definition
| caused by Orbivirus and Rotavirus |
|
|
Term
| African Horse Sickness (AHS) Characteristics |
|
Definition
Reportable
affects horses, donkeys, mules, zebra |
|
|
Term
| African Horse Sickness Signs |
|
Definition
acute form - pulmonary form; severe respiratory disease with high mortality
fluid shifts cause shock and colic
Chronic form-cardiac form is less virulent strain; fever, edema, cardiac hemorrhages, hydropericardium |
|
|
Term
| African Horse Sickness Tropism |
|
Definition
lymphoid tissue
respiratory epithelium |
|
|
Term
| African Horse Sickness Transmission |
|
Definition
horizontal - arbovirus
mosquitoes and culicoides, reservoir animals (donkeys, zebra, elephants, dogs) |
|
|
Term
| African Horse Sickness Control |
|
Definition
vector control
don't vaccinate because don't want to mask signs and they are not that effective
quarantine |
|
|
Term
| Bluetongue Characteristics |
|
Definition
worldwide disease
sheep, deer, cattle, goats
arbovirus |
|
|
Term
|
Definition
subclinical to severe febrile vascular disease
deer infected the most
cattle and goats could be amplifying reservoirs |
|
|
Term
|
Definition
hematopoietic cells
endothelial cells |
|
|
Term
|
Definition
cyanotic - "Blue tongue"
circulatory disturbances
lesions on oral mucosa, tongue, coronary bands
edema, hemorrhages, fetal abnormalities
vesicular lesions in cattle
can't eat or drink |
|
|
Term
|
Definition
horizontal - arbovirus (main)
verticle - transplacental, semen |
|
|
Term
| Epizootic Hemorrhagic Disease Characteristics |
|
Definition
in deer in USA
Ibaraki disease in cattle (foreign animal disease)
arbovirus |
|
|
Term
| Epizootic Hemorrhagic Disease Signs |
|
Definition
| clinically resembles bluetongue |
|
|
Term
|
Definition
| enteric mucosa of differentiated epithelium |
|
|
Term
|
Definition
short incubation period
direct invasion of enterocytes |
|
|
Term
|
Definition
|
|
Term
|
Definition
milk scours
affects young production animals |
|
|
Term
|
Definition
sanitation, isolate ill animals
vaccinate local mucosal immunity to increase colostral antibody titers |
|
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