BVD

Question 1

BVDV can be frequently detected in the background of respiratory diseases

Answer 1

T

Question 2

BVD virus is particularly resistant to disinfectants

Answer 2

F

Question 3

Rodents play a central role in the maintenance of BVD virus in the environment

Answer 3

F

Question 4

Cytopathic and non-cytopathic biotypes of the Bovine Viral Diarrhoea (BVD) virus are known

Answer 4

T

Question 5

In utero infection with non-cytopathic BVDV can cause seropositivity of the newborn calf

Answer 5

T

Question 6

Non cytopathic strains of Bovine viral diarrhoea virus (BVDV) can cause hydrocephalus and
cerebellar hypoplasia

Answer 6

F

Question 7

In utero infection with non cytopathic BVDV can cause immunotolerance

Answer 7

T

Question 8

In utero infection with cytopathic BVDV strain results immunotolerant calves

Answer 8

F

Question 9

Swine are not susceptible to BVD

Answer 9

F

Question 10

Two serotypes of the BVD virus are known so far, serotype 2 is more virulent

Answer 10

F

Question 11

Pigs infected with BVDV turn seropositive to classical swine fever

Answer 11

T

Question 12

Persistently infected cattle can maintain BVDV in a farm

Answer 12

T

Question 13

Cytopathic strains of Bovine Viral diarrhoea (BVDV) alone can cause mucosal disease

Answer 13

F

Question 14

Non-cytopathic BVD virus strain can mutate and become cytopathic

Answer 14

T

Question 15

The BVD virus can infect pigs also

Answer 15

T

Question 16

Cytopathic strains of the Bovine Viral Diarrhoea virus (BVDV) can cause abortion

Answer 16

T

Question 17

Non cytopathic strains of Bovine Viral Diarrhoea virus (BVDV) do not cause transplacental
infection

Answer 17

F

Question 18

Intrauterine BVD virus infection always causes abortion

Answer 18

F

Question 19

In sheep BVDV causes symptoms similar to border disease

Answer 19

T

Question 20

Mucosal disease can develop in cattle persistently infected with BVDV

Answer 20

F

Question 21

Non cytopathic strains of Bovine viral diarrhoea virus (BVDV) can cause immunosuppression

Answer 21

T

Question 22

BVDV can be transmitted by semen

Answer 22

T

Question 23

BVD virus cannot be transmitted via artificial insemination

Answer 23

F

Question 24

In mucosal disease sharp edged, usually round or oval ulcers can be observed on the oral
mucosa

Answer 24

T

Question 25

In mucosal disease haemorrhages can be observed under the serosal surfaces and in the kidney cortex

Answer 25

T

Question 26

Bloody diarrhoea is a clinical sign of the mucosal disease

Answer 26

T

Question 27

BVD virus cannot be propagated in cell cultures

Answer 27

F. but check CSF what tenk said

Question 28

Mucosal disease usually emerges in cattle farms as explosive outbreaks with high morbidity

Answer 28

F

Question 29

BVD and mucosal disease are caused by the same viral species

Answer 29

T

Question 30

Attenuated vaccine strains against the bovine viral diarrhoea virus may have foetopathic effects

Answer 30

T

Question 31

Eradication programmes against the bovine viral diarrhoea virus are usually based on the selection of immunotolerant animals

Answer 31

T

Question 32

Eradication of BVD virus is based on the removal of immunotolerant animals

Answer 32

T

Question 33

The only efficient way of BVD eradication is the replacement of all animals on the farm

Answer 33

F

Question 34

Two genotypes of the BVDV are known

Answer 34

T

Question 35

BVDV forms one serotype, but there are significant antigenic differences between the strains

Answer 35

T

Question 36

Persistently infected animals play the major role in the maintenance and spread of BVDV

Answer 36

T

Question 37

BVDV infection may cause immunosuppression

Answer 37

T

Question 38

Bovine neonatal pancytopenia (BNP) is an immunopathy observed in immunotolerant, BVDV infected calves

Answer 38

F

Question 39

Bovine neonatal pancytopenia (BNP) is caused by a bovine viral diarrhea

Answer 39

F

Question 40

The BVD virus typically damages endothelial-, epithelial- and lymphatic tissues

Answer 40

T

Question 41

Wild birds are the natural hosts of the BVDV

Answer 41

F

Question 42

Environmental contamination does not play a role in the spread of the BVDV

Answer 42

F

Question 43

Only inactivated vaccines can be used for the prevention against BVD

Answer 43

F

Question 44

The BVD virus genotype 2 is less virulent than genotype 1.

Answer 44

F

Question 45

The BVD virus cannot be transmitted via artificial insemination.

Answer 45

F

Question 46

BVD clinically is mostly seen in cattle from 6 to 24 months of age.

Answer 46

T

Question 47

BVD virus can cause severe damage to fetuses in pregnant cows.

Answer 47

T

Question 48

Only cattle is susceptible to BVD virus.

Answer 48

F

Question 49

BVD virus exists in several serotypes.

Answer 49

F

Question 50

BVD infection of pregnant cows can result in delivery of immunotolerant persistently infected calves.

Answer 50

T

Question 51

Bulls can shed BVD virus for long time in semen, without showing any clinical sign.

Answer 51

T

Question 52

Both attenuated live and inactivated vaccines are used in eradication of BVD.

Answer 52

T

Question 53

BVDV cannot be propagated in cell cultures.

Answer 53

F

Question 54

BVDV is practically sensitive to disinfectants.

Answer 54

T

Question 55

Rodents play a central role in the maintenance of BVD virus in the environment.

Answer 55

F

Question 56

Bovine Viral Diarrhoea cannot be transmitted with AI.

Answer 56

F

Question 57

The BVD virus typically damages endothelial epithelial- and lymphatic tissues.

Answer 57

T

Question 58

Mucosal Disease, only inactivated vaccines can be used for the prevention against BVD.

Answer 58

F

Question 59

Cytopathic BVDV strains cause mucosal disease in immune-tolerant calves.

Answer 59

T

Question 60

Because Europe is free from BVD, it is forbidden to use vaccines against it.

Answer 60

F

Question 61

Because IBDV is an immunosuppressive virus, no vaccines available against it

Answer 61

F