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EPI.o.i.d > Circovirus > Flashcards

Circovirus Flashcards

1
Q

The reproduction of the circovirus continuous in the dividing cells

A

T

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2
Q

The circovirus is too small so it’s a bad antigen

A

F

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3
Q

The circovirus is a good antigen

A

T

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4
Q

Circovirus infections are immune suppressive

A

T

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5
Q

Circovirus can easily be cultured in different homologous cell lines

A

F

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6
Q

Circoviruses can be cultured easily in many cell lines

A

F

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7
Q

Resistance of circovirus is very low, in the environment they are inactivated within a day

A

F

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8
Q

The resistance of Circoviruses is high, they remain infectious in the environment for several months

A

T

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9
Q

Causes generalized lymphoid depletion

A

T

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10
Q

Circoviruses Only cause the depletion of B-lymphocytes

A

F

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11
Q

Canine circoviruses are present worldwide

A

F

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12
Q

Circovirus are very resistant viruses

A

T

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13
Q

The circovirus has circular RNA in its genome

A

F

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14
Q

Swine circovirus causes lesions in multiple organs and strong immunosuppression

A

T

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15
Q

Porcine circovirus can be transmitted by mice and rats

A

T

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16
Q

Porcine circovirus vaccines are available both for sows and for piglets

A

T

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17
Q

Detection of PCV2’s DNA is enough for the correct diagnosis

A

F

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18
Q

Four species of swine circovirus were described

A

T

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19
Q

The porcine circovirus 2 is proven to be immunosuppressive

A

T

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20
Q

PCV2 detection in foetal myocardium is pathognomic value

A

T

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21
Q

Porcine circovirus replicates in the myocardium of the foetus

A

T

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22
Q

In pigs the porcine circovirus 2 can cause BFD.

A

F

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23
Q

The porcine circovirus can replicate in the foetus

A

T

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24
Q

The clinical signs, pathological and histopathological examination suggest PCV2 induced disease

A

T (do we also need virus detection?)

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25
Q

PCV2 can cause respiratory signs

A

T

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26
Q

The primer replication of PCV2 is in lymphoid tissues of the throat

A

T

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27
Q

PCV2 infection does not always cause clinical signs

A

T

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28
Q

Porcine circovirus 2 always causes clinical signs in pigs

A

F

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29
Q

Porcine circovirus 2 always causes clinical signs in cattle

A

F

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30
Q

There is no efficient vaccine against PCV2

A

F

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31
Q

The porcine circovirus can replicate in the foetus

A

T

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32
Q

Circovirus in pigs can be subclinical

A

T

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33
Q

Porcine circoviruses are responsible for a variety of clinical conditions

A

T

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34
Q

Porcine circoviruses cannot be responsible for reproductive disorders

A

F

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35
Q

Porcine circoviruses are present worldwide

A

T

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36
Q

Porcine circoviruses cause severe haemorrhagic diseases in pigs

A

T

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37
Q

Porcine circoviruses are genetically and antigenically uniform

A

F

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38
Q

Porcine circoviruses may cause a variety of diseases

A

T

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39
Q

For prevention of Swine circovirus disease only general hygienic measures can be used

A

F

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40
Q

Swine circovirus can cause retarded growth and strong immunosuppression

A

T

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41
Q

Swine circovirus caused disease occurs worldwide, it is frequent

A

T

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42
Q

For prevention of swine circovirus disease, inactivated vaccine is available

A

T

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43
Q

Swine circovirus causes only respiratory signs

A

F

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44
Q

Swine circovirus may be shed in excretions for several months after recovery

A

T

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45
Q

For prevention of Porcine circovirus disease vaccines are available

A

T

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46
Q

The incubation period of Porcine circovirus caused disease is about 2-4 weeks

A

T

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47
Q

Incubation period of porcine circovirus disease is short, some days

A

F

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48
Q

Porcine circovirus-2 causes clinical signs mainly after weaning

A

T

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49
Q

Predisposing factors for Porcine Circovirus associated disease can be: Vaccines. The virus variant. Virus strain

A

T

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50
Q

Predisposing factors for Porcine Circovirus associated disease can be Food management

A

F

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51
Q

PCV2 can cause: Enteric disorders. Disorders in the nervous system. Respiratory disease. Reproductions disorders

A

T

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52
Q

Porcine circovirus-1 may damage the foetus

A

F

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53
Q

Porcine circoviruses cannot be responsible for reproductive disorders

A

F

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54
Q

Porcine circoviruses replicate in the heart of the foetus

A

T

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55
Q

Porcine circovirus may cause inapparent infections

A

T

56
Q

Circovirus can be responsible for the Porcine Respiratory Disease Complex

A

T

57
Q

Reproductive disorders caused by Porcine circoviruses are only significant in North Ameri

A

F

58
Q

Circovirus cause skin lesions in swine

A

T

59
Q

A clinical sign of PMWS can be a progressive weight loss

A

T

60
Q

PMWS is a type 3 hypersensitivity

A

F

61
Q

PMWS is a type 4 hypersensitivity

A

F

62
Q

One of the most common pathological signs of PMWS is glomerulonephritis

A

F

63
Q

Typical pathological finding of PMWS is enlarged mesenteric lymph nodes

A

T

64
Q

Typical pathological finding of PMWS is pneumonia

A

F
occurs but not typical

Typical: Enlarged LNs + Progressive BW↓

65
Q

A clinical sign of PMWS can be haemorrhages in the skin

A

F

66
Q

In pigs the porcine circovirus 1 can cause PMWS

A

F
PCV1 is nonpathogenic

67
Q

In pigs the porcine circovirus 2 can cause PDNS

A

T

68
Q

One of the most common pathological signs of PDNS is glomerulonephritis

A

T

69
Q

PDNS is an allergic disease

A

T

70
Q

e appearance of PDNS is related to the good antigenicity of PCV2

A

T

71
Q

PDNS is a type III hypersensitivity

A

T

72
Q

PDNS is a type IV hypersensitivity

A

F

73
Q

PDNS may develop without porcine circovirus 2

A

T

74
Q

One of the most common clinical signs of PDNS is multifocal circular red skin disease

A

T

75
Q

Porcine dermatitis nephropathy can only be caused by circoviruses

A

F

76
Q

Porcine dermatitis and nephropathy syndrome are only caused by PCV-2

A

F

77
Q

PDNS disease is an immunocomplex disease

A

T

78
Q

PDNS is only caused by PCV-1

A

F

79
Q

PDNS does not occur in Hungary

A

F

80
Q

DNS occurs primarily in the weeks following the selection/weaning

A

T

81
Q

PDNS is caused by both PCV-1 and PCV-2

A

F

82
Q

PDNS is not caused by PCV

A

F

83
Q

PDNS has been widespread in Hungary in Hungary since 1998

A

T

84
Q

PDNS is a rare infection causing clinical signs only in piglets before weaning

A

F

85
Q

PDNS is a frequent infection with clinical signs after weaning

A

T

86
Q

Prevention of PDNS is with live attenuated vaccines.

A

F

Inactivated + Recombinant

87
Q

Regarding PDNS, general preventative rules and recently inactivated or vector vaccination can be used

A

F
Vector are live vaccines

Inactivated or recombinant

88
Q

In pigs the porcine circovirus 2 can cause BFD

A

F

89
Q

Avian circovirus causes clinical signs similar to those seen in PMWS

A

T

90
Q

Avian circovirus causes clinical signs similar to those seen in PDNS

A

F

PMWS

91
Q

The pigeon circovirus is not an important disease because the virus causes feather and beak deformities

A

F

92
Q

The beak and feather diseases causes typically neurological signs

A

F

Pigeon and goose cause ataxia

93
Q

In parrots porcine circovirus 2 causes the psittacine beak and feather disease

A

F

94
Q

The beak and feather disease can be acute problem

A

T

95
Q

Feather and beak deformities may appear after circovirus infection of geese and pigeons

A

T

96
Q

Beak and feather disease lesions are sometimes obvious only after molting

A

T

97
Q

Avian circovirus infections result high morbidity and low mortality

A

T

98
Q

Pigeon circoviruses are antigenically uniform

A

F

99
Q

Pigeon circoviruses frequently appear in diseases together with other viruses and bacteria.

A

T

100
Q

Circovirus in geese and ducks can cause retarded growth and feather formation disturbances

A

T

101
Q

Avian circoviruses do not cause clinical signs in domestic birds

A

F

102
Q

In ducks and geese, Avian circoviruses can cause retarded growth and immunosuppression

A

T

103
Q

Avian circoviruses can spread via breeder eggs

A

T

104
Q

Avian circoviruses do not cause disease in wild birds

A

F

105
Q

Avian circoviruses are species specific

A

T
Duck, goose , pigeon ,raven …etc Circovirus

106
Q

Avian circoviruses can infect many poultry species

A

T

107
Q

Avian circoviruses can cause retarded growth and immunosuppression

A

T

108
Q

Inactivated vaccines are used against pigeon circovirus infections

A

F?

109
Q

Pigeon circovirus infections do not occur in Hungary, the disease is prevented by vaccination

A

F

110
Q

Circoviruses can infect pigeons

A

T

111
Q

Vaccines are available for Pigeon Circoviruses

A

F

112
Q

Clinical signs of PBFDV (Psittacine Beak and Feather Disease Virus) are only seen at time of moulting

A

F

113
Q

The chicken infectious anaemia virus is also commonly detected in goose

A

F

114
Q

Anaemia and haemorrhages are two important clinical signs of chicken anaemia

A

T

115
Q

The chicken infectious anaemia is a chicken disease up to 1 month of age

A

T

116
Q

The chicken infectious anaemia virus causes only anaemia

A

F

117
Q

The chicken anaemia virus does not replicate in lymphoid progenitors

A

F

118
Q

There are vaccines available against chicken anaemia

A

T

119
Q

The chicken infectious anaemia is a disease of hens

A

F

120
Q

The chicken infectious anaemia causes clinical signs similar to those seen in PDNS

A

F

121
Q

Vertical infectious is not possible in chicken infectious anaemia

A

F

122
Q

Infection of day old chickens with the chicken anaemia virus leads to immune suppression

A

T

123
Q

Chicken anaemia virus is transmitted both horizontally and vertically

A

T

124
Q

Atrophy of the thymus is a post mortem finding of Chicken Infectious Anaemia virus

A

T

125
Q

Infectious Chicken anaemia virus can cause clinical signs only in layer hens

A

F

126
Q

Infectious chicken anaemia virus causes clinical signs in chicken of 1 to 4 weeks of age

A

T

127
Q

For prevention of infectious chicken anaemia, live attenuated vaccine is available

A

T

128
Q

Infection of day-old chickens with the chicken anaemia virus leads to immune suppression

A

T

129
Q

Chicken anaemia virus infection can result in high mortality of chickens over 3 weeks of age.

A

F

130
Q

In Chicken Infectious anaemia, most symptoms are observed in the first month

A

T

131
Q

Chicken Infectious anaemia involves destruction of the lymphoid and myeloid cells

A

T

132
Q

Chicken Infectious anaemia virus induces apoptosis of activated T-cells

A

T

133
Q

Pigeons can be infected by Chicken Infectious anaemia virus

A

F

134
Q

Chicken Infectious anaemia virus does not replicate in the thymus

A

F

135
Q

Chicken Infectious anaemia in day old chickens causes a long-lasting immunosuppression

A

T

136
Q

Chicken Infectious anaemia virus is a Gyrovirus

A

T

137
Q

Chicken anaemia virus infection can cause death of chickens below 3 weeks of age

A

T

EPI.o.i.d (50 decks)

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