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EPI Final PQ > 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

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

A

F

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7
Q

Circoviruses can be cultured easily in many cell lines.

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. (Cicrocv)

A

T

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10
Q

Only causes the depletion of B-lymphocytes (cicrcoV)

A

F(lymphoid depletion in PMWS)

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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(circular ssDNA)

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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( PNWS, PDNS, reproductive disorders, PRSD)

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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

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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 (inactivated, complete virus)

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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 (Inactivated, complete virus)

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40
Q

Swine circovirus can cause retarded growth and strong immunosuppression.

A

T

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41
Q

For prevention of swine circovirus disease, inactivated vaccine is available.

A

T

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42
Q

Swine circovirus caused disease occurs worldwide, it is frequent

A

T

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43
Q

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

A

T

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44
Q

Swine circovirus causes only respiratory signs

A

F

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45
Q

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

A

T

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46
Q

For prevention of Porcine circovirus disease vaccines are available.

A

T

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47
Q

Porcine circovirus-2 causes clinical signs mainly after weaning.

A

T

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48
Q

Incubation period of porcine circovirus disease is short, some days

A

F
2w

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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

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56
Q

Circovirus can be responsible for the Porcine Respiratory Disease Complex.

A

T

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57
Q

Circovirus cause skin lesions in swine

A

T

58
Q

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

A

F

59
Q

A clinical sign of PMWS can be a progressive weight loss.

A

T(weightloss, jaundice, rough hair)

60
Q

PMWS is a type 3 hypersensitivity

A

F (pdns)

61
Q

One of the most common pathological signs of PMWS is glomerulonephritis

A

F (PDNS)

62
Q

PMWS is a type 4 hypersensitivity

A

F

63
Q

Typical pathological finding of PMWS is pneumonia

A

T

64
Q

PDNS is an allergic disease.

A

F

65
Q

Typical pathological finding of PMWS is enlarged mesenteric lymph nodes

A

T ( also inguinal)

66
Q

A clinical sign of PMWS can be haemorrhages in the skin

A

F ( haemorrhages in the LN)

67
Q

In pigs the porcine circovirus 1 can cause PMWS.

A

F

68
Q

In pigs the porcine circovirus 2 can cause PDNS

A

T

69
Q

One of the most common pathological signs of PDNS is glomerulonephritis.

A

T

70
Q

The 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 may develop without porcine circovirus 2

A

T

73
Q

PDNS is a type IV hypersensitivity

A

F

74
Q

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

A

F (PCV-3, PCV-2)

75
Q

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

A

T

76
Q

PDNS disease is an immunocomplex disease

A

T

77
Q

PDNS pathology is enlarged brown-greyish kidney, with haemorrhages

A

T-cant see in file

78
Q

PDNS does not occur in Hungary

A

F

79
Q

PDNS occurs primarily in the weeks following the selection/weaning.

A

T

80
Q

A clinical sign of PDNS can be haemorrhages in the skin

A

T

81
Q

PDNS is not caused by PCV

A

F

82
Q

PDNS has been widespread in Hungary in Hungary since 1998

A

T

83
Q

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

A

F

84
Q

Prevention of PDNS is with live attenuated vaccines.

A

F (Inactivated, complete virus)

85
Q

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

A

T

86
Q

In pigs the porcine circovirus 2 can cause BFD

A

F

87
Q

Avian circovirus causes clinical signs similar to those seen in PMWS.

A

T

88
Q

Avian circovirus causes clinical signs similar to those seen in PDNS.

A

F (similar to PMWS)

89
Q

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

A

F

90
Q

The beak and feather diseases causes typically neurological signs

A

F

91
Q

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

A

F

92
Q

The beak and feather disease can be acute problem

A

T

93
Q

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

A

T

94
Q

Beak and feather disease lesions are sometimes obvious only after molting

A

T

95
Q

Avian circovirus infections result high morbidity and low mortality.

A

T

96
Q

Pigeon circoviruses are antigenically uniform

A

F

97
Q

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

A

T

98
Q

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

A

T

99
Q

Avian circoviruses do not cause clinical signs in domestic birds.

A

F

100
Q

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

A

T

101
Q

Avian circoviruses can spread via breeder eggs

A

T

102
Q

Avian circoviruses do not cause disease in wild birds.

A

F

103
Q

Avian circoviruses are species specific.

A

T

104
Q

Avian circoviruses can infect many poultry species.

A

T

105
Q

Avian circoviruses can cause retarded growth and immunosuppressio

A

T

106
Q

Inactivated vaccines are used against pigeon circovirus infections.

A

F

107
Q

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

A

F

108
Q

Circoviruses can infect pigeons

A

T

109
Q

Vaccines are available for Pigeon Circoviruses.

A

T-vac before race period

110
Q

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

A

F

111
Q

The chicken infectious anaemia virus is also commonly detected in goose.

A

F (only chicken!)

112
Q

Anaemia and haemorrhages are two important clinical signs of chicken anaemia.

A

T

113
Q

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

A

T

114
Q

The chicken infectious anaemia virus causes only anaemia

A

F

115
Q

The chicken anaemia virus does not replicate in lymphoid progenitors

A

F

116
Q

There are vaccines available against chicken anaemia

A

T

117
Q

The chicken infectious anaemia is a disease of hens

A

F
Under 3w

118
Q

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

A

F

119
Q

Vertical infectious is not possible in chicken infectious anaemia

A

F (horizontal and vertical is possible)

120
Q

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

A

T

121
Q

Chicken anaemia virus is transmitted both horizontally and vertically.

A

T

122
Q

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

A

T

123
Q

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

A

F

124
Q

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

A

T

125
Q

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

A

T

126
Q

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

A

T

127
Q

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

A

F

128
Q

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

A

T

129
Q

Chicken Infectious anaemia involves destruction of the lymphoid and myeloid cells.

A

T

130
Q

Chicken Infectious anaemia virus induces apoptosis of activated T-cells.

A

T

131
Q

Pigeons can be infected by Chicken Infectious anaemia virus.

A

F

132
Q

Chicken Infectious anaemia virus does not replicate in the thymus.

A

F

133
Q

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

A

T

134
Q

Chicken Infectious anaemia virus is a Gyrovirus

A

T

135
Q

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

A

T

136
Q

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

A

F

137
Q

PDNS is not caused by PCV

A

F(pcv2/3)

138
Q

PDNS may develop without porcine circovirus 2

A

T-correct

139
Q

PDNS can only be caused by circoviruses

A

F

140
Q

PDNS is only caused by PCV-1

A

F

141
Q

PDNS does not occur in Hungary

A

F

EPI Final PQ (49 decks)

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