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EPI 1 > Bovine Viral diarrhoea > Flashcards

Bovine Viral diarrhoea Flashcards

1
Q

BVDV can be frequently detected in the background of respiratory diseases

A

True

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2
Q

BVD virus is particularly resistant to disinfectants

A

False

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3
Q

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

A

False

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4
Q

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

A

True

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5
Q

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

A

True

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6
Q

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

A

False

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7
Q

In utero infection with non cytopathic BVDV can cause immunotolerance

A

True

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8
Q

In utero infection with cytopathic BVDV strain results immunotolerant calves

A

False

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9
Q

Swine are not susceptible to BVD

A

False

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10
Q

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

A

True

False? 2 genotypes but 1 serotype?

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11
Q

Pigs infected with BVDV turn seropositive to classical swine fever

A

True

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12
Q

Persistently infected cattle can maintain BVDV in a farm

A

True

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13
Q

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

A

False

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14
Q

Non-cytopathic BVD virus strain can mutate and become cytopathic

A

True

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15
Q

The BVD virus can infect pigs also

A

True

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16
Q

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

A

True

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17
Q

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

A

False

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18
Q

Intrauterine BVD virus infection always causes abortion

A

False

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19
Q

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

A

True

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20
Q

In sheep BVDV causes symptoms similar to border disease

A

True

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21
Q

Mucosal disease can develop in cattle persistently infected with BVDV

A

True

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22
Q

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

A

True

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23
Q

BVDV can be transmitted by semen

A

True

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24
Q

BVD virus cannot be transmitted via artificial insemination

A

False

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25
Q

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

A

True

26
Q

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

A

True

27
Q

Bloody diarrhoea is a clinical sign of the mucosal disease

A

True

28
Q

BVD virus cannot be propagated in cell cultures

A

False

29
Q

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

A

False

30
Q

BVD and mucosal disease are caused by the same viral species

A

True

31
Q

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

A

True

32
Q

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

A

False

33
Q

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

A

True

34
Q

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

A

False

35
Q

Two genotypes of the BVDV are known

A

True

36
Q

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

A

True

37
Q

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

A

True

38
Q

BVDV infection may cause immunosuppression

A

True

39
Q

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

A

False

40
Q

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

A

False

41
Q

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

A

True

42
Q

Wild birds are the natural hosts of the BVDV

A

False

43
Q

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

A

False

44
Q

Only inactivated vaccines can be used for the prevention against BVD

A

False

45
Q

The BVD virus genotype 2 is less virulent than genotype 1

A

False

46
Q

The BVD virus cannot be transmitted via artificial insemination

A

False

47
Q

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

A

True

48
Q

BVD virus can cause severe damage to fetuses in pregnant cows

A

True

49
Q

Only cattle is susceptible to BVD virus

A

False

50
Q

BVD virus exists in several serotypes

A

False

51
Q

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

A

True

52
Q

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

A

True

53
Q

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

A

True

54
Q

BVDV cannot be propagated in cell cultures

A

False

55
Q

BVDV is practically sensitive to disinfectants

A

True

56
Q

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

A

False

57
Q

Bovine Viral Diarrhoea cannot be transmitted with AI

A

False

58
Q

The BVD virus typically damages endothelial epithelial- and lymphatic tissues

A

True

59
Q

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

A

False

60
Q

Cytopathic BVDV strains cause mucosal disease in immune-tolerant calves

A

True

61
Q

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

A

False

62
Q

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

A

False

EPI 1 (56 decks)

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