Bovine Viral diarrhoea

Question 1

BVDV can be frequently detected in the background of respiratory diseases

Answer 1

True

Question 2

BVD virus is particularly resistant to disinfectants

Answer 2

False

Question 3

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

Answer 3

False

Question 4

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

Answer 4

True

Question 5

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

Answer 5

True

Question 6

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

Answer 6

False

Question 7

In utero infection with non cytopathic BVDV can cause immunotolerance

Answer 7

True

Question 8

In utero infection with cytopathic BVDV strain results immunotolerant calves

Answer 8

False

Question 9

Swine are not susceptible to BVD

Answer 9

False

Question 10

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

Answer 10

True

False? 2 genotypes but 1 serotype?

Question 11

Pigs infected with BVDV turn seropositive to classical swine fever

Answer 11

True

Question 12

Persistently infected cattle can maintain BVDV in a farm

Answer 12

True

Question 13

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

Answer 13

False

Question 14

Non-cytopathic BVD virus strain can mutate and become cytopathic

Answer 14

True

Question 15

The BVD virus can infect pigs also

Answer 15

True

Question 16

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

Answer 16

True

Question 17

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

Answer 17

False

Question 18

Intrauterine BVD virus infection always causes abortion

Answer 18

False

Question 19

Cattle which are immune tolerant to BVD virus may develop mucosal disease

Answer 19

True

Question 20

In sheep BVDV causes symptoms similar to border disease

Answer 20

True

Question 21

Mucosal disease can develop in cattle persistently infected with BVDV

Answer 21

True

Question 22

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

Answer 22

True

Question 23

BVDV can be transmitted by semen

Answer 23

True

Question 24

BVD virus cannot be transmitted via artificial insemination

Answer 24

False

Question 25

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

Answer 25

True

Question 26

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

Answer 26

True

Question 27

Bloody diarrhoea is a clinical sign of the mucosal disease

Answer 27

True

Question 28

BVD virus cannot be propagated in cell cultures

Answer 28

False

Question 29

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

Answer 29

False

Question 30

BVD and mucosal disease are caused by the same viral species

Answer 30

True

Question 31

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

Answer 31

True

Question 32

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

Answer 32

False

Question 33

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

Answer 33

True

Question 34

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

Answer 34

False

Question 35

Two genotypes of the BVDV are known

Answer 35

True

Question 36

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

Answer 36

True

Question 37

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

Answer 37

True

Question 38

BVDV infection may cause immunosuppression

Answer 38

True

Question 39

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

Answer 39

False

Question 40

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

Answer 40

False

Question 41

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

Answer 41

True

Question 42

Wild birds are the natural hosts of the BVDV

Answer 42

False

Question 43

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

Answer 43

False

Question 44

Only inactivated vaccines can be used for the prevention against BVD

Answer 44

False

Question 45

The BVD virus genotype 2 is less virulent than genotype 1

Answer 45

False

Question 46

The BVD virus cannot be transmitted via artificial insemination

Answer 46

False

Question 47

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

Answer 47

True

Question 48

BVD virus can cause severe damage to fetuses in pregnant cows

Answer 48

True

Question 49

Only cattle is susceptible to BVD virus

Answer 49

False

Question 50

BVD virus exists in several serotypes

Answer 50

False

Question 51

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

Answer 51

True

Question 52

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

Answer 52

True

Question 53

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

Answer 53

True

Question 54

BVDV cannot be propagated in cell cultures

Answer 54

False

Question 55

BVDV is practically sensitive to disinfectants

Answer 55

True

Question 56

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

Answer 56

False

Question 57

Bovine Viral Diarrhoea cannot be transmitted with AI

Answer 57

False

Question 58

The BVD virus typically damages endothelial epithelial- and lymphatic tissues

Answer 58

True

Question 59

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

Answer 59

False

Question 60

Cytopathic BVDV strains cause mucosal disease in immune-tolerant calves

Answer 60

True

Question 61

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

Answer 61

False

Question 62

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

Answer 62

False