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Epi > Circoviruses > Flashcards

Circoviruses Flashcards

1
Q

1) The reproduction of the circovirus continuous in the dividing cells

A

true

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2
Q

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

A

false

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3
Q

3) The circovirus is a good antigen

A

true

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4
Q

4) Circovirus infections are immune suppressive

A

true

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5
Q

5) Circovirus can easily be cultured in different homologous cell lines

A

false

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6
Q

6) Circoviruses can be cultured easily in many cell lines

A

false

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7
Q

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

A

false

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8
Q

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

A

true

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9
Q

9) Causes generalized lymphoid depletion

A

true

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10
Q

10) Only causes the depletion of B-lymphocytes

A

false

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11
Q

10) Only causes the depletion of B-lymphocytes

A

false

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12
Q

11) Canine circoviruses are present worldwide

A

false

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13
Q

12) Circovirus are very resistant viruses

A

true

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14
Q

13) The circovirus has circular RNA in its genome

A

false

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15
Q

1) Swine circovirus causes lesions in multiple organs and strong immunosuppression

A

true

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16
Q

2) Porcine circovirus can be transmitted by mice and rats

A

true

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17
Q

3) Porcine circovirus vaccines are available both for sows and for piglets

A

true

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18
Q

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

A

false

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19
Q

5) Four species of swine circovirus were described

A

true

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20
Q

6) The porcine circovirus 2 is proven to be immunosuppressive

A

true

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21
Q

7) PCV2 detection in foetal myocardium is pathognomic value

A

true

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22
Q

8) Porcine circovirus replicates in the myocardium of the foetus

A

true

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23
Q

9) In pigs the porcine circovirus 2 can cause BFD

A

false

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24
Q

10) The porcine circovirus can replicate in the foetus

A

true

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25
Q

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

A

true, do we also need virus detection?

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26
Q

12) PCV2 can cause respiratory signs

A

true

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27
Q

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

A

true

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28
Q

14) PCV2 infection does not always cause clinical signs

A

true

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29
Q

15) Porcine circovirus 2 always causes clinical signs in pigs

A

false

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30
Q

16) Porcine circovirus 2 always causes clinical signs in cattle

A

false

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31
Q

17) There is no efficient vaccine against PCV2

A

false

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32
Q

18) The porcine circovirus can replicate in the foetus

A

true

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33
Q

19) Circovirus in pigs can be subclinical.

A

true

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34
Q

20) Porcine circoviruses are responsible for a variety of clinical conditions

A

true

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35
Q

21) Porcine circoviruses cannot be responsible for reproductive disorders

A

false

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36
Q

22) Porcine circoviruses are present worldwide

A

true

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37
Q

23) Porcine circoviruses cause severe haemorrhagic diseases in pigs

A

true

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38
Q

24) Porcine circoviruses are genetically and antigenically uniform.

A

false

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39
Q

25) Porcine circoviruses may cause a variety of diseases

A

true

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40
Q

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

A

false

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41
Q

27) Swine circovirus can cause retarded growth and strong immunosuppression

A

true

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42
Q

28) Swine circovirus caused disease occurs worldwide, it is frequent

A

true

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43
Q

29) For prevention of swine circovirus disease, inactivated vaccine is available

A

true

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44
Q

30) Swine circovirus causes only respiratory signs

A

false

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45
Q

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

A

true

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46
Q

32) For prevention of Porcine circovirus disease vaccines are available

A

true

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47
Q

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

A

true

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48
Q

34) Incubation period of porcine circovirus disease is short, some days

A

false

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49
Q

35) Porcine circovirus-2 causes clinical signs mainly after weaning.

A

true

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50
Q

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

A

true

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51
Q

37) Predisposing factors for Porcine Circovirus associated disease can be Food management.

A

false

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52
Q

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

A

true

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53
Q

39) Porcine circovirus-1 may damage the foetus.

A

false, should be true, fetus myocardium

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54
Q

40) Porcine circoviruses cannot be responsible for reproductive disorders

A

false

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55
Q

41) Porcine circoviruses replicate in the heart of the foetus

A

true

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56
Q

42) Porcine circovirus may cause inapparent infections

A

true

57
Q

43) Circovirus can be responsible for the Porcine Respiratory Disease Complex

A

true

58
Q

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

A

false

59
Q

45) Circovirus cause skin lesions in swine

A

true

60
Q

1) A clinical sign of PMWS can be a progressive weight loss

A

true

61
Q

2) PMWS is a type 3 hypersensitivity

A

false

62
Q

3) PMWS is a type 4 hypersensitivity

A

false

63
Q

4) One of the most common pathological signs of PMWS is glomerulonephritis

A

false

64
Q

5) Typical pathological finding of PMWS is enlarged mesenteric lymph nodes

A

true

65
Q

6) Typical pathological finding of PMWS is pneumonia

A

false

66
Q

7) A clinical sign of PMWS can be haemorrhages in the skin

A

false

67
Q

8) In pigs the porcine circovirus 1 can cause PMWS

A

true, should be false, its pcv2 - pcv1 is non pathogenic

68
Q

1) In pigs the porcine circovirus 2 can cause PDNS

A

true

69
Q

2) One of the most common pathological signs of PDNS is glomerulonephritis

A

true

70
Q

3) PDNS is an allergic disease

A

true

71
Q

4) The appearance of PDNS is related to the good antigenicity of PCV2

A

true

72
Q

5) PDNS is a type III hypersensitivity

A

true

73
Q

6) PDNS is a type IV hypersensitivity

A

false

74
Q

7) PDNS may develop without porcine circovirus 2

A

true

75
Q

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

A

true

76
Q

9) Porcine dermatitis nephropathy can only be caused by circoviruses

A

false

77
Q

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

A

false

78
Q

11) PDNS disease is an immunocomplex disease

A

true

79
Q

12) PDNS is only caused by PCV-1

A

false

80
Q

13) PDNS does not occur in Hungary.

A

false

81
Q

14) PDNS occurs primarily in the weeks following the selection/weaning

A

true

82
Q

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

A

false

83
Q

16) PDNS is not caused by PCV

A

false

84
Q

17) PDNS has been widespread in Hungary in Hungary since 1998

A

true

85
Q

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

A

false

86
Q

19) PDNS is a frequent infection with clinical signs after weaning

A

true

87
Q

20) Prevention of PDNS is with live attenuated vaccines

A

false, dont pcv2 vaccines protect against all pcvd?

88
Q

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

A

true

89
Q

1) In pigs the porcine circovirus 2 can cause BFD.

A

false

90
Q

2) Avian circovirus causes clinical signs similar to those seen in PMWS

A

true

91
Q

3) Avian circovirus causes clinical signs similar to those seen in PDNS

A

false

92
Q

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

A

false

93
Q

5) The beak and feather diseases causes typically neurological signs

A

false

94
Q

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

A

false

95
Q

7) The beak and feather disease can be acute problem

A

true

96
Q

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

A

true

97
Q

9) Beak and feather disease lesions are sometimes obvious only after molting

A

true

98
Q

10) Avian circovirus infections result high morbidity and low mortality.

A

true

99
Q

11) Pigeon circoviruses are antigenically uniform

A

false

100
Q

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

A

true

101
Q

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

A

true

102
Q

14) Avian circoviruses do not cause clinical signs in domestic birds.

A

false

103
Q

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

A

true

104
Q

16) Avian circoviruses can spread via breeder eggs

A

true

105
Q

17) Avian circoviruses do not cause disease in wild birds.

A

false

106
Q

18) Avian circoviruses are species specific

A

true

107
Q

19) Avian circoviruses can infect many poultry species

A

true

108
Q

20) Avian circoviruses can cause retarded growth and immunosuppression

A

true

109
Q

21) Inactivated vaccines are used against pigeon circovirus infections

A

false

110
Q

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

A

false

111
Q

23) Circoviruses can infect pigeons

A

true

112
Q

24) Vaccines are available for Pigeon Circoviruses

A

false

113
Q

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

A

false

114
Q

1) The chicken infectious anaemia virus is also commonly detected in goose

A

false

115
Q

2) Anaemia and haemorrhages are two important clinical signs of chicken anaemia

A

true

116
Q

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

A

true

117
Q

4) The chicken infectious anaemia virus causes only anaemia

A

false

118
Q

5) The chicken anaemia virus does not replicate in lymphoid progenitors

A

false

119
Q

6) There are vaccines available against chicken anaemia

A

true

120
Q

7) The chicken infectious anaemia is a disease of hens

A

false

121
Q

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

A

false

122
Q

9) Vertical infectious is not possible in chicken infectious anaemia

A

false

123
Q

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

A

true

124
Q

11) Chicken anaemia virus is transmitted both horizontally and vertically

A

true

125
Q

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

A

true

126
Q

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

A

false

127
Q

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

A

true

128
Q

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

A

true

129
Q

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

A

true

130
Q

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

A

false

131
Q

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

A

true

132
Q

19) Chicken Infectious anaemia involves destruction of the lymphoid and myeloid cells

A

true

133
Q

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

A

true

134
Q

21) Pigeons can be infected by Chicken Infectious anaemia virus

A

false

135
Q

22) Chicken Infectious anaemia virus does not replicate in the thymus

A

false

136
Q

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

A

true

137
Q

24) Chicken Infectious anaemia virus is a Gyrovirus

A

true

138
Q

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

A

true

Epi (74 decks)

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