Reoviridae

Question 1

Reo stands for

Answer 1

Respiratory Enteric Orphan

Question 2

Reoviridae general

Answer 2

nonenveloped, spherical

composed of 3 concentic layers (outer, middle Inner)

Question 3

Reoviridae genome

Answer 3

segmented, dsRNA

Question 4

Reoviridae replication takes place in

Answer 4

the cytoplasm

Question 5

Genetic ____ occurs between viruses within a genus or serogroup

Answer 5

reassortment

Question 6

Orbivirus of sheep causes

Answer 6

Bluetongue (BTV)
Reportable
also effects cattle, deer, wild ruminants

Question 7

BTV: primary reservoir and amplifier (animal)

Answer 7

Cattle

Question 8

BTV: transmission

Answer 8

biological transmission by Culicoides

transplacental, veneral possible

Question 9

BTV: serotypes found in the U.S.

Answer 9

10, 11, 13, 17

2 is mainly in southeast

Question 10

BTV: pathogenesis

Answer 10

damage to vascular endothelium- intravascular coagulation - necrosis of organs and tissues

Question 11

BTV: CS of sheep

Answer 11

severe febrile disease, profuse salivation, mucopurulent nasal discharge, laminits, abortion, facial edema
*Cyanosis and necrotic ulceration of tongue

Question 12

BTV: CS in cattle

Answer 12

erosions of buccal cavity, hemo and congestion of muzzle, oral ucleration, mucopurulent nasal discharge, ulcers on teats, facial edema, abortion, lameness

Question 13

BTV: diagnosis

Answer 13

CS, virus isolation, immunohisto, PCR, detect Ab- ELISA, necropsy

Question 14

BTV: control

Answer 14

vaccine, pest control

Question 15

Orbivirus that infects horses causes

Answer 15

African horse sickness (AHS)

Question 16

AHS- transmission

Answer 16

mechanically by culicoides

Question 17

AHS- reservoir

Answer 17

Zebras

Question 18

AHS- CS

Answer 18

profuse nasal serous and froth discharge, sometimes bloody

intralobular pulmonary edema, facial edema, congested conjunctiva, hydropericardium/peritoneum, petechiae intestine

Question 19

AHS: diagnosis

Answer 19

CS, necropsy, virus isolation, serology, PCR

Question 20

AHS: control

Answer 20

vaccination, vector control, slaughter infected animals

Question 21

One of the major causes of severe viral diarrhea

Answer 21

Rotavirus

Question 22

Rotavirus has characteristic ____ apperance

Answer 22

Wheel-like

Question 23

Most common Rotavirus serotype to cause diarrhea

Answer 23

RVA- group A rotaviruses

Question 24

Rotavirus: transmission

Answer 24

Fecal-oral transmission

Question 25

Rotavirus: main cell of viral replication

Answer 25

Mature enterocytes of villi of upper small intestine

Question 26

Rotavirus NSP4 (non-structural protein 4) acts as

Answer 26

an enterotoxin

Question 27

Rotavirus: CS

Answer 27

severe diarrhea of young, pasty, yellow/pale color feces, sometime mucous or blood flecks
anorexia, dehydration, mild fever

Question 28

Rotavirus: diagnosis

Answer 28

PAGE- polyacrylamide Gel electrophoresis

ELISA, PCR, etc.

Question 29

Rotavirus: control

Answer 29

vaccine

Question 30

Orthoreovirus is also known as__ causing___

Answer 30

Avian Reovirus

viral arthritis/tenosynovitis

Question 31

Avian reovirus normally causes leg weakness in __ (type) chickens

Answer 31

Broilers

Question 32

AR: transmission

Answer 32

Fecal-oral

tranovarial and inhalation

Question 33

AR localizes in the __ joint

Answer 33

Hock joint

Question 34

AR: CS

Answer 34

swollen, inflamed hock joints, inflamed synovial membrane, ruptured gastrocnemius tendons
stunted growth, atrophy pancreas

Question 35

AR: diagnosis

Answer 35

CS, necropsy, virus isolation, ELISA, PCR

Question 36

AR: control

Answer 36

vaccines