Circoviruses Flashcards
1
Q
1) The reproduction of the circovirus continuous in the dividing cells
A
true
2
Q
2) The circovirus is too small so it’s a bad antigen
A
false
3
Q
3) The circovirus is a good antigen
A
true
4
Q
4) Circovirus infections are immune suppressive
A
true
5
Q
5) Circovirus can easily be cultured in different homologous cell lines
A
false
6
Q
6) Circoviruses can be cultured easily in many cell lines
A
false
7
Q
7) Resistance of circovirus is very low, in the environment they are inactivated within a day
A
false
8
Q
8) The resistance of Circoviruses is high, they remain infectious in the environment for several months
A
true
9
Q
9) Causes generalized lymphoid depletion
A
true
10
Q
10) Only causes the depletion of B-lymphocytes
A
false
11
Q
10) Only causes the depletion of B-lymphocytes
A
false
12
Q
11) Canine circoviruses are present worldwide
A
false
13
Q
12) Circovirus are very resistant viruses
A
true
14
Q
13) The circovirus has circular RNA in its genome
A
false
15
Q
1) Swine circovirus causes lesions in multiple organs and strong immunosuppression
A
true
16
Q
2) Porcine circovirus can be transmitted by mice and rats
A
true
17
Q
3) Porcine circovirus vaccines are available both for sows and for piglets
A
true
18
Q
4) Detection of PCV2’s DNA is enough for the correct diagnosis.
A
false
19
Q
5) Four species of swine circovirus were described
A
true
20
Q
6) The porcine circovirus 2 is proven to be immunosuppressive
A
true
21
Q
7) PCV2 detection in foetal myocardium is pathognomic value
A
true
22
Q
8) Porcine circovirus replicates in the myocardium of the foetus
A
true
23
Q
9) In pigs the porcine circovirus 2 can cause BFD
A
false
24
Q
10) The porcine circovirus can replicate in the foetus
A
true
25
11) The clinical signs, pathological and histopathological examination suggest PCV2 induced disease
true, do we also need virus detection?
26
12) PCV2 can cause respiratory signs
true
27
13) The primer replication of PCV2 is in lymphoid tissues of the throat
true
28
14) PCV2 infection does not always cause clinical signs
true
29
15) Porcine circovirus 2 always causes clinical signs in pigs
false
30
16) Porcine circovirus 2 always causes clinical signs in cattle
false
31
17) There is no efficient vaccine against PCV2
false
32
18) The porcine circovirus can replicate in the foetus
true
33
19) Circovirus in pigs can be subclinical.
true
34
20) Porcine circoviruses are responsible for a variety of clinical conditions
true
35
21) Porcine circoviruses cannot be responsible for reproductive disorders
false
36
22) Porcine circoviruses are present worldwide
true
37
23) Porcine circoviruses cause severe haemorrhagic diseases in pigs
true
38
24) Porcine circoviruses are genetically and antigenically uniform.
false
39
25) Porcine circoviruses may cause a variety of diseases
true
40
26) For prevention of Swine circovirus disease only general hygienic measures can be used.
false
41
27) Swine circovirus can cause retarded growth and strong immunosuppression
true
42
28) Swine circovirus caused disease occurs worldwide, it is frequent
true
43
29) For prevention of swine circovirus disease, inactivated vaccine is available
true
44
30) Swine circovirus causes only respiratory signs
false
45
31) Swine circovirus may be shed in excretions for several months after recovery
true
46
32) For prevention of Porcine circovirus disease vaccines are available
true
47
33) The incubation period of Porcine circovirus caused disease is about 2-4 weeks
true
48
34) Incubation period of porcine circovirus disease is short, some days
false
49
35) Porcine circovirus-2 causes clinical signs mainly after weaning.
true
50
36) Predisposing factors for Porcine Circovirus associated disease can be: Vaccines. The virus variant. Virus strain
true
51
37) Predisposing factors for Porcine Circovirus associated disease can be Food management.
false
52
38) PCV2 can cause: Enteric disorders. Disorders in the nervous system. Respiratory disease. Reproductions disorders
true
53
39) Porcine circovirus-1 may damage the foetus.
false, should be true, fetus myocardium
54
40) Porcine circoviruses cannot be responsible for reproductive disorders
false
55
41) Porcine circoviruses replicate in the heart of the foetus
true
56
42) Porcine circovirus may cause inapparent infections
true
57
43) Circovirus can be responsible for the Porcine Respiratory Disease Complex
true
58
44) Reproductive disorders caused by Porcine circoviruses are only significant in North America
false
59
45) Circovirus cause skin lesions in swine
true
60
1) A clinical sign of PMWS can be a progressive weight loss
true
61
2) PMWS is a type 3 hypersensitivity
false
62
3) PMWS is a type 4 hypersensitivity
false
63
4) One of the most common pathological signs of PMWS is glomerulonephritis
false
64
5) Typical pathological finding of PMWS is enlarged mesenteric lymph nodes
true
65
6) Typical pathological finding of PMWS is pneumonia
false
66
7) A clinical sign of PMWS can be haemorrhages in the skin
false
67
8) In pigs the porcine circovirus 1 can cause PMWS
true, should be false, its pcv2 - pcv1 is non pathogenic
68
1) In pigs the porcine circovirus 2 can cause PDNS
true
69
2) One of the most common pathological signs of PDNS is glomerulonephritis
true
70
3) PDNS is an allergic disease
true
71
4) The appearance of PDNS is related to the good antigenicity of PCV2
true
72
5) PDNS is a type III hypersensitivity
true
73
6) PDNS is a type IV hypersensitivity
false
74
7) PDNS may develop without porcine circovirus 2
true
75
8) One of the most common clinical signs of PDNS is multifocal circular red skin disease
true
76
9) Porcine dermatitis nephropathy can only be caused by circoviruses
false
77
10) Porcine dermatitis and nephropathy syndrome are only caused by PCV-2
false
78
11) PDNS disease is an immunocomplex disease
true
79
12) PDNS is only caused by PCV-1
false
80
13) PDNS does not occur in Hungary.
false
81
14) PDNS occurs primarily in the weeks following the selection/weaning
true
82
15) PDNS is caused by both PCV-1 and PCV-2
false
83
16) PDNS is not caused by PCV
false
84
17) PDNS has been widespread in Hungary in Hungary since 1998
true
85
18) PDNS is a rare infection causing clinical signs only in piglets before weaning
false
86
19) PDNS is a frequent infection with clinical signs after weaning
true
87
20) Prevention of PDNS is with live attenuated vaccines
false, dont pcv2 vaccines protect against all pcvd?
88
21) Regarding PDNS, general preventative rules and recently inactivated or vector vaccination can be used.
true
89
1) In pigs the porcine circovirus 2 can cause BFD.
false
90
2) Avian circovirus causes clinical signs similar to those seen in PMWS
true
91
3) Avian circovirus causes clinical signs similar to those seen in PDNS
false
92
4) The pigeon circovirus is not an important disease because the virus causes feather and beak deformities
false
93
5) The beak and feather diseases causes typically neurological signs
false
94
6) In parrots porcine circovirus 2 causes the psittacine beak and feather disease
false
95
7) The beak and feather disease can be acute problem
true
96
8) Feather and beak deformities may appear after circovirus infection of geese and pigeons
true
97
9) Beak and feather disease lesions are sometimes obvious only after molting
true
98
10) Avian circovirus infections result high morbidity and low mortality.
true
99
11) Pigeon circoviruses are antigenically uniform
false
100
12) Pigeon circoviruses frequently appear in diseases together with other viruses and bacteria
true
101
13) Circovirus in geese and ducks can cause retarded growth and feather formation disturbances
true
102
14) Avian circoviruses do not cause clinical signs in domestic birds.
false
103
15) In ducks and geese, Avian circoviruses can cause retarded growth and immunosuppression
true
104
16) Avian circoviruses can spread via breeder eggs
true
105
17) Avian circoviruses do not cause disease in wild birds.
false
106
18) Avian circoviruses are species specific
true
107
19) Avian circoviruses can infect many poultry species
true
108
20) Avian circoviruses can cause retarded growth and immunosuppression
true
109
21) Inactivated vaccines are used against pigeon circovirus infections
false
110
22) Pigeon circovirus infections do not occur in Hungary, the disease is prevented by vaccination
false
111
23) Circoviruses can infect pigeons
true
112
24) Vaccines are available for Pigeon Circoviruses
false
113
25) Clinical signs of PBFDV (Psittacine Beak and Feather Disease Virus) are only seen at time of moulting.
false
114
1) The chicken infectious anaemia virus is also commonly detected in goose
false
115
2) Anaemia and haemorrhages are two important clinical signs of chicken anaemia
true
116
3) The chicken infectious anaemia is a chicken disease up to 1 month of age
true
117
4) The chicken infectious anaemia virus causes only anaemia
false
118
5) The chicken anaemia virus does not replicate in lymphoid progenitors
false
119
6) There are vaccines available against chicken anaemia
true
120
7) The chicken infectious anaemia is a disease of hens
false
121
8) The chicken infectious anaemia causes clinical signs similar to those seen in PDNS
false
122
9) Vertical infectious is not possible in chicken infectious anaemia
false
123
10) Infection of day old chickens with the chicken anaemia virus leads to immune suppression
true
124
11) Chicken anaemia virus is transmitted both horizontally and vertically
true
125
12) Atrophy of the thymus is a post mortem finding of Chicken Infectious Anaemia virus
true
126
13) Infectious Chicken anaemia virus can cause clinical signs only in layer hens
false
127
14) Infectious chicken anaemia virus causes clinical signs in chicken of 1 to 4 weeks of age
true
128
15) For prevention of infectious chicken anaemia, live attenuated vaccine is available.
true
129
16) Infection of day-old chickens with the chicken anaemia virus leads to immune suppression
true
130
17) Chicken anaemia virus infection can result in high mortality of chickens over 3 weeks of age
false
131
18) In Chicken Infectious anaemia, most symptoms are observed in the first month
true
132
19) Chicken Infectious anaemia involves destruction of the lymphoid and myeloid cells
true
133
20) Chicken Infectious anaemia virus induces apoptosis of activated T-cells.
true
134
21) Pigeons can be infected by Chicken Infectious anaemia virus
false
135
22) Chicken Infectious anaemia virus does not replicate in the thymus
false
136
23) Chicken Infectious anaemia in day old chickens causes a long-lasting immunosuppression
true
137
24) Chicken Infectious anaemia virus is a Gyrovirus
true
138
25) Chicken anaemia virus infection can cause death of chickens below 3 weeks of age
true
