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