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Epidemiology - MIDTERM 2 > PQS - African swine fever > Flashcards

PQS - African swine fever Flashcards

1
Q

Several virulence variants of African Swine Fever Virus exist

A

T
Very, moderately and weakly

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2
Q

African swine fever is shed in the saliva of the infected animals

A

T

+ nasal discharge

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3
Q

Stamping out of the infected herds is applied in the control of African Swine Fever

A

T

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4
Q

The leading clinical sign in African swine fever is excess salivation

A

F

Haemorrhages

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5
Q

In acute African swine fever the leading pathological findings are the haemorrhages

A

T

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6
Q

The African swine fever infects the swine per os

A

T

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7
Q

The African swine fever virus genome codes only 2 proteins

A

F

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8
Q

The African swine fever virus infects the swine by air

A

F

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9
Q

In African swine fever cases of abortion are never observed

A

F

Abortion always happens

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10
Q

The primary replication site of African swine fever virus is the oronasal mucosa.

A

F

In tonsilla, regional lymph node

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11
Q

The tick species vectoring African swine fever are present in Portugal and Spain

A

T

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12
Q

The ASF virus is serologically uniform but several genotypes exist

A

T

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13
Q

In acute ASF we can observe high mortality in sows

A

T

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14
Q

Vaccines are available in EU to be used in the control of African swine fever

A

F

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15
Q

Vaccines are available to be used in the control of ASF

A

F

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16
Q

The immune system cannot neutralize the ASF virus by antibodies

A

T

No neutralizing antibodies are produced

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17
Q

The African swine fever virus can be disinfected by 2%NaOh within 1 day

A

F

5% hypochlorite is needed

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18
Q

In Europe the main route of infection is the transmission of the African swine fever by ticks

A

F

Only in southern Europe - Spain and Portugal

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19
Q

The African swine fever virus is highly resistant against the environmental conditions

A

T

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20
Q

The African swine fever causes hemadsorption in cell cultures

A

T

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21
Q

In the control of African swine fever thinning of the wild boar populations is helpful

A

T

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22
Q

ASF is always a peracute disease

A

F

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23
Q

ASF virus retains its infectivity for years in frozen meat

A

T

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24
Q

The African swine fever virus replicated in lymphocytes

A

F

Only in Leuckocytes, monocytes and macrophages

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25
Q

Wild boars may be chronically infected with African swine fever virus

A

T

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26
Q

Wild boars can carry African Swine Fever virus as chronically infected animals

A

T

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27
Q

African swine fever is endemic in Sardinia

A

T

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28
Q

ASF virus is shed in the urine of the infected animals

A

F

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29
Q

The primary replication sites of African swine fever virus are the tonsils and lymph nodes

A

T

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30
Q

In acute ASF cases the leading pathological finding is the black and enlarged lymph nodes

A

T

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31
Q

In case of African swine fever enlarged spleen is observed during necropsy.

A

T

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32
Q

The ASF virus replicates the bone marrow

A

T

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33
Q

The tick species vectoring African swine fever are present in Portugal and Spain

34
Q

The resistance of the African swine fever virus is very low

A

F

The exemption of the “thumb rule” of enveloped/non-enveloped viruses

35
Q

African swine fever is generally transmitted by mosquitoes

A

F

Tick in southern countries and oral infection

36
Q

African swine fever can cause disease in humans

37
Q

The African swine fever virus can be inactivated by irradiation

38
Q

African Swine Fever virus infects every cloven hoofed animal

A

F

Only swine and wild boars/warthogs

39
Q

African Swine Fever does not occur in Europe.

40
Q

African Swine Fever is a resistant virus.

41
Q

Immunocomplexes are formed in the case of African Swine Fever

A

T

It is the ultimate outcome of AFV

42
Q

Only activated vaccines are used for the prevention of African Swine Fever.

A

F

NO vaccines available

43
Q

Ticks can transmit African Swine Fever virus

44
Q

In ASF cases abortion is never observed

A

F

In general: abortion ALWAYS happens

45
Q

Swine and wild boars are susceptible to African Swine Fever virus.

46
Q

Warthogs can maintain African Swine Fever in endemic areas

47
Q

Attenuated vaccines are used for the prevention of African swine fever

48
Q

African Swine Fever virus has a low resistance

49
Q

African Swine Fever virus can infect pigs and wild boars

50
Q

The clinical signs of African Swine Fever are more severe in wild boars than in farmed pigs.

51
Q

There is a widespread vaccination in endemic areas to prevent African Swine Fever

52
Q

In Europe the ticks are the most important means in the transmission of the ASF virus.

A

F

Oral infection

53
Q

In case of ASF infection viremia can last for months

54
Q

Infection by moderately virulent ASF virus results in high mortality of sows

A

T

90-100%, closer to 100%

55
Q

The moderately virulent ASF virus does not cause fever.

A

F

Fever is due to the viraemia!!

56
Q

In case of infection by highly virulent ASF virus we can see skin necrosis as clinical sign.

A

F

Causes peracute disease = rapid death, without pathological findings or clinical signs
Can see skin necrosis in chronic form, mild virulent strain

57
Q

In chronic cases of ASF spleen hyperplasia is a leading pathological lesion

58
Q

African swine fever leads to abortion regardless of the virulence of the infecting virus

59
Q

Wild boars may carry African Swine Fever virus as chronically infected animals

60
Q

The main tool against African Swine Fever is vaccination

61
Q

Virulent strains of African Swine Fever virus cause an acute disease in domestic pigs.

A

T

Acute disease = moderate strain

62
Q

Acute African Swine Fever is characterized by haemorrhages.

63
Q

Vaccination is used for prevention of African Swine Fever.

64
Q

African Swine Fever cause skin lesions in swine

A

T

Chronic form causes ulcers in skin

65
Q

African Swine Fever is caused by arbovirus.

66
Q

African Swine Fever is endemic in Central Europe.

A

F

Endemic in Sardinia

67
Q

African Swine Fever virus infects pigs and ruminants.

A

F

Only pigs

68
Q

African Swine Fever virus can replicate in certain ticks.

A

T

In soft ticks

69
Q

African Swine Fever is caused by any arbovirus.

70
Q

African Swine Fever is a notifiable disease

71
Q

Virus neutralization is the most important tool for African Swine Fever diagnosis.

72
Q

Pregnant sows abort in case of African Swine Fever disease cases.

73
Q

The chronic form of African Swine Fever is similar to other immune complex disorders

74
Q

African Swine Fever infection of humans leads to cold like symptoms.

75
Q

African Swine Fever virus may cause chronic infections in pigs.

76
Q

African Swine Fever may cause a chronic disease in wild boars.

77
Q

African swine fever virus can replicate in certain soft ticks.

78
Q

The clinical picture of chronic African Swine Fever is similar to dermatitis Nephritis/nephropathy.

79
Q

African Swine Fever does not have any vaccination.

80
Q

The ASF virus can be detected by hemagglutination test

81
Q

The boutons in the intestines are characteristic pathological findings in case of ASF

A

F

This is the case of Classical swine fever

82
Q

Several virulence variants of ASF virus exist

Epidemiology - MIDTERM 2 (35 decks)

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