Circovirus Flashcards
(137 cards)
1
Q
The reproduction of the circovirus continuous in the dividing cells
A
T
2
Q
The circovirus is too small so it’s a bad antigen
A
F
3
Q
The circovirus is a good antigen
A
T
4
Q
Circovirus infections are immune suppressive
A
T
5
Q
Circovirus can easily be cultured in different homologous cell lines
A
F
6
Q
Circoviruses can be cultured easily in many cell lines
A
F
7
Q
Resistance of circovirus is very low, in the environment they are inactivated within a day
A
F
8
Q
The resistance of Circoviruses is high, they remain infectious in the environment for several months
A
T
9
Q
Causes generalized lymphoid depletion
A
T
10
Q
Circoviruses Only cause the depletion of B-lymphocytes
A
F
11
Q
Canine circoviruses are present worldwide
A
F
12
Q
Circovirus are very resistant viruses
A
T
13
Q
The circovirus has circular RNA in its genome
A
F
14
Q
Swine circovirus causes lesions in multiple organs and strong immunosuppression
A
T
15
Q
Porcine circovirus can be transmitted by mice and rats
A
T
16
Q
Porcine circovirus vaccines are available both for sows and for piglets
A
T
17
Q
Detection of PCV2’s DNA is enough for the correct diagnosis
A
F
18
Q
Four species of swine circovirus were described
A
T
19
Q
The porcine circovirus 2 is proven to be immunosuppressive
A
T
20
Q
PCV2 detection in foetal myocardium is pathognomic value
A
T
21
Q
Porcine circovirus replicates in the myocardium of the foetus
A
T
22
Q
In pigs the porcine circovirus 2 can cause BFD.
A
F
23
Q
The porcine circovirus can replicate in the foetus
A
T
24
Q
The clinical signs, pathological and histopathological examination suggest PCV2 induced disease
A
T (do we also need virus detection?)
25
PCV2 can cause respiratory signs
T
26
The primer replication of PCV2 is in lymphoid tissues of the throat
T
27
PCV2 infection does not always cause clinical signs
T
28
Porcine circovirus 2 always causes clinical signs in pigs
F
29
Porcine circovirus 2 always causes clinical signs in cattle
F
30
There is no efficient vaccine against PCV2
F
31
The porcine circovirus can replicate in the foetus
T
32
Circovirus in pigs can be subclinical
T
33
Porcine circoviruses are responsible for a variety of clinical conditions
T
34
Porcine circoviruses cannot be responsible for reproductive disorders
F
35
Porcine circoviruses are present worldwide
T
36
Porcine circoviruses cause severe haemorrhagic diseases in pigs
T
37
Porcine circoviruses are genetically and antigenically uniform
F
38
Porcine circoviruses may cause a variety of diseases
T
39
For prevention of Swine circovirus disease only general hygienic measures can be used
F
40
Swine circovirus can cause retarded growth and strong immunosuppression
T
41
Swine circovirus caused disease occurs worldwide, it is frequent
T
42
For prevention of swine circovirus disease, inactivated vaccine is available
T
43
Swine circovirus causes only respiratory signs
F
44
Swine circovirus may be shed in excretions for several months after recovery
T
45
For prevention of Porcine circovirus disease vaccines are available
T
46
The incubation period of Porcine circovirus caused disease is about 2-4 weeks
T
47
Incubation period of porcine circovirus disease is short, some days
F
48
Porcine circovirus-2 causes clinical signs mainly after weaning
T
49
Predisposing factors for Porcine Circovirus associated disease can be: Vaccines. The virus variant. Virus strain
T
50
Predisposing factors for Porcine Circovirus associated disease can be Food management
F
51
PCV2 can cause: Enteric disorders. Disorders in the nervous system. Respiratory disease. Reproductions disorders
T
52
Porcine circovirus-1 may damage the foetus
F
53
Porcine circoviruses cannot be responsible for reproductive disorders
F
54
Porcine circoviruses replicate in the heart of the foetus
T
55
Porcine circovirus may cause inapparent infections
T
56
Circovirus can be responsible for the Porcine Respiratory Disease Complex
T
57
Reproductive disorders caused by Porcine circoviruses are only significant in North Ameri
F
58
Circovirus cause skin lesions in swine
T
59
A clinical sign of PMWS can be a progressive weight loss
T
60
PMWS is a type 3 hypersensitivity
F
61
PMWS is a type 4 hypersensitivity
F
62
One of the most common pathological signs of PMWS is glomerulonephritis
F
63
Typical pathological finding of PMWS is enlarged mesenteric lymph nodes
T
64
Typical pathological finding of PMWS is pneumonia
F
occurs but not typical
Typical: Enlarged LNs + Progressive BW↓
65
A clinical sign of PMWS can be haemorrhages in the skin
F
66
In pigs the porcine circovirus 1 can cause PMWS
F
PCV1 is nonpathogenic
67
In pigs the porcine circovirus 2 can cause PDNS
T
68
One of the most common pathological signs of PDNS is glomerulonephritis
T
69
PDNS is an allergic disease
T
70
e appearance of PDNS is related to the good antigenicity of PCV2
T
71
PDNS is a type III hypersensitivity
T
72
PDNS is a type IV hypersensitivity
F
73
PDNS may develop without porcine circovirus 2
T
74
One of the most common clinical signs of PDNS is multifocal circular red skin disease
T
75
Porcine dermatitis nephropathy can only be caused by circoviruses
F
76
Porcine dermatitis and nephropathy syndrome are only caused by PCV-2
F
77
PDNS disease is an immunocomplex disease
T
78
PDNS is only caused by PCV-1
F
79
PDNS does not occur in Hungary
F
80
DNS occurs primarily in the weeks following the selection/weaning
T
81
PDNS is caused by both PCV-1 and PCV-2
F
82
PDNS is not caused by PCV
F
83
PDNS has been widespread in Hungary in Hungary since 1998
T
84
PDNS is a rare infection causing clinical signs only in piglets before weaning
F
85
PDNS is a frequent infection with clinical signs after weaning
T
86
Prevention of PDNS is with live attenuated vaccines.
F
Inactivated + Recombinant
87
Regarding PDNS, general preventative rules and recently inactivated or vector vaccination can be used
F
Vector are live vaccines
Inactivated or recombinant
88
In pigs the porcine circovirus 2 can cause BFD
F
89
Avian circovirus causes clinical signs similar to those seen in PMWS
T
90
Avian circovirus causes clinical signs similar to those seen in **PDNS**
F
PMWS
91
The pigeon circovirus is not an important disease because the virus causes feather and beak deformities
F
92
The beak and feather diseases causes typically neurological signs
F
Pigeon and goose cause ataxia
93
In parrots porcine circovirus 2 causes the psittacine beak and feather disease
F
94
The beak and feather disease can be acute problem
T
95
Feather and beak deformities may appear after circovirus infection of geese and pigeons
T
96
Beak and feather disease lesions are sometimes obvious only after molting
T
97
Avian circovirus infections result high morbidity and low mortality
T
98
Pigeon circoviruses are antigenically uniform
F
99
Pigeon circoviruses frequently appear in diseases together with other viruses and bacteria.
T
100
Circovirus in geese and ducks can cause retarded growth and feather formation disturbances
T
101
Avian circoviruses do not cause clinical signs in domestic birds
F
102
In ducks and geese, Avian circoviruses can cause retarded growth and immunosuppression
T
103
Avian circoviruses can spread via breeder eggs
T
104
Avian circoviruses do not cause disease in wild birds
F
105
Avian circoviruses are species specific
T
Duck, goose , pigeon ,raven ...etc Circovirus
106
Avian circoviruses can infect many poultry species
T
107
Avian circoviruses can cause retarded growth and immunosuppression
T
108
Inactivated vaccines are used against pigeon circovirus infections
F?
109
Pigeon circovirus infections do not occur in Hungary, the disease is prevented by vaccination
F
110
Circoviruses can infect pigeons
T
111
Vaccines are available for Pigeon Circoviruses
F
112
Clinical signs of PBFDV (Psittacine Beak and Feather Disease Virus) are only seen at time of moulting
F
113
The chicken infectious anaemia virus is also commonly detected in goose
F
114
Anaemia and haemorrhages are two important clinical signs of chicken anaemia
T
115
The chicken infectious anaemia is a chicken disease up to 1 month of age
T
116
The chicken infectious anaemia virus causes only anaemia
F
117
The chicken anaemia virus does not replicate in lymphoid progenitors
F
118
There are vaccines available against chicken anaemia
T
119
The chicken infectious anaemia is a disease of hens
F
120
The chicken infectious anaemia causes clinical signs similar to those seen in PDNS
F
121
Vertical infectious is not possible in chicken infectious anaemia
F
122
Infection of day old chickens with the chicken anaemia virus leads to immune suppression
T
123
Chicken anaemia virus is transmitted both horizontally and vertically
T
124
Atrophy of the thymus is a post mortem finding of Chicken Infectious Anaemia virus
T
125
Infectious Chicken anaemia virus can cause clinical signs only in layer hens
F
126
Infectious chicken anaemia virus causes clinical signs in chicken of 1 to 4 weeks of age
T
127
For prevention of infectious chicken anaemia, live attenuated vaccine is available
T
128
Infection of day-old chickens with the chicken anaemia virus leads to immune suppression
T
129
Chicken anaemia virus infection can result in high mortality of chickens over 3 weeks of age.
F
130
In Chicken Infectious anaemia, most symptoms are observed in the first month
T
131
Chicken Infectious anaemia involves destruction of the lymphoid and myeloid cells
T
132
Chicken Infectious anaemia virus induces apoptosis of activated T-cells
T
133
Pigeons can be infected by Chicken Infectious anaemia virus
F
134
Chicken Infectious anaemia virus does not replicate in the thymus
F
135
Chicken Infectious anaemia in day old chickens causes a long-lasting immunosuppression
T
136
Chicken Infectious anaemia virus is a Gyrovirus
T
137
Chicken anaemia virus infection can cause death of chickens below 3 weeks of age
T
