Arbo - BTV

Question 1

BTV/EHD - Family - Genus

Answer 1

Reo - Orbi

Question 2

BTV/EHD - Virion

Answer 2

Naked - dsRNA - Segmented

Question 3

BTV/EHD - Vector

Answer 3

Culicoides - Midge

Question 4

BTV/EHD - # Serotypes

Answer 4

24 - Outer Capsid
5 - US (2,10, 11, 13, 17)
BTV-8 - N. Europe

Question 5

BTV - Hosts

Answer 5

Sheep, Cattle, Deer, Antelope, Goats

Question 6

BTV - Two Clinical Signs

Answer 6

Repro
Vasculitis

Question 7

BTV - Character of Disease

Answer 7

Fever
Salivation
Nasal Discharge, Cyanotic Mucous Membranes
Hyperemia
Inflammation
Ulceration of mucous membranes
Intravascular coagulation and thrombosis
Hemorrhage
Edema

Question 8

BTV - Repro signs

Answer 8

Abortion
Hydra/hydrocephaly
Arthogryposis - angular limb

Question 9

BTV - Cycle

Answer 9

1. Entry and Rep in LN
2. Transient viremia and rep in RE and Endothelial cells
3. Amp in Central Depots
4. Prolonged 2nd Viremia and sequestration in Blood
5. Vector spread

Question 10

BTV - Pathogenesis

Answer 10

Lesions in vascular system
Coagulation and thrombosis
Congestion, hemorrhage and edema
Immunopathogenic

Question 11

BTV - Diagnosis

Answer 11

Sheep - Clinical signs
Cattle - Serology/VI
PCR

Question 12

BTV - Serology

Answer 12

VP7 (inner capsid) - Group specific
Vp2 (outer capsid) - Serotype specific

Question 13

BTV - Control

Answer 13

Indoor housing
Grazing sights
Vaccination - Not during vector season (reassortment)
-Cross protection