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