CIRCOVIRUS Flashcards
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
Circoviruses can be cultured easily in many cell lines.
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. (Cicrocv)
A
T
10
Q
Only causes the depletion of B-lymphocytes (cicrcoV)
A
F(lymphoid depletion in PMWS)
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(circular ssDNA)
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( PNWS, PDNS, reproductive disorders, PRSD)
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
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 (inactivated, complete virus)
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 (Inactivated, complete virus)
40
Swine circovirus can cause retarded growth and strong immunosuppression.
T
41
For prevention of swine circovirus disease, inactivated vaccine is available.
T
42
Swine circovirus caused disease occurs worldwide, it is frequent
T
43
Swine circovirus may be shed in excretions for several months after recovery.
T
44
Swine circovirus causes only respiratory signs
F
45
The incubation period of Porcine circovirus caused disease is about 2-4 weeks
T
46
For prevention of Porcine circovirus disease vaccines are available.
T
47
Porcine circovirus-2 causes clinical signs mainly after weaning.
T
48
Incubation period of porcine circovirus disease is short, some days
F
2w
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
Circovirus cause skin lesions in swine
T
58
Reproductive disorders caused by Porcine circoviruses are only significant in North
America
F
59
A clinical sign of PMWS can be a progressive weight loss.
T(weightloss, jaundice, rough hair)
60
PMWS is a type 3 hypersensitivity
F (pdns)
61
One of the most common pathological signs of PMWS is glomerulonephritis
F (PDNS)
62
PMWS is a type 4 hypersensitivity
F
63
Typical pathological finding of PMWS is pneumonia
T
64
PDNS is an allergic disease.
F
65
Typical pathological finding of PMWS is enlarged mesenteric lymph nodes
T ( also inguinal)
66
A clinical sign of PMWS can be haemorrhages in the skin
F ( haemorrhages in the LN)
67
In pigs the porcine circovirus 1 can cause PMWS.
F
68
In pigs the porcine circovirus 2 can cause PDNS
T
69
One of the most common pathological signs of PDNS is glomerulonephritis.
T
70
The appearance of PDNS is related to the good antigenicity of PCV2
T
71
PDNS is a type III hypersensitivity
T
72
PDNS may develop without porcine circovirus 2
T
73
PDNS is a type IV hypersensitivity
F
74
Porcine dermatitis and nephropathy syndrome are only caused by PCV-2
F (PCV-3, PCV-2)
75
One of the most common clinical signs of PDNS is multifocal circular red skin disease
T
76
PDNS disease is an immunocomplex disease
T
77
PDNS pathology is enlarged brown-greyish kidney, with haemorrhages
T-cant see in file
78
PDNS does not occur in Hungary
F
79
PDNS occurs primarily in the weeks following the selection/weaning.
T
80
A clinical sign of PDNS can be haemorrhages in the skin
T
81
PDNS is not caused by PCV
F
82
PDNS has been widespread in Hungary in Hungary since 1998
T
83
PDNS is a rare infection causing clinical signs only in piglets before weaning.
F
84
Prevention of PDNS is with live attenuated vaccines.
F (Inactivated, complete virus)
85
Regarding PDNS, general preventative rules and recently inactivated or vector vaccination can be used.
T
86
In pigs the porcine circovirus 2 can cause BFD
F
87
Avian circovirus causes clinical signs similar to those seen in PMWS.
T
88
Avian circovirus causes clinical signs similar to those seen in PDNS.
F (similar to PMWS)
89
The pigeon circovirus is not an important disease because the virus causes feather and beak deformities
F
90
The beak and feather diseases causes typically neurological signs
F
91
In parrots porcine circovirus 2 causes the psittacine beak and feather disease
F
92
The beak and feather disease can be acute problem
T
93
Feather and beak deformities may appear after circovirus infection of geese and pigeons
T
94
Beak and feather disease lesions are sometimes obvious only after molting
T
95
Avian circovirus infections result high morbidity and low mortality.
T
96
Pigeon circoviruses are antigenically uniform
F
97
Pigeon circoviruses frequently appear in diseases together with other viruses and bacteria.
T
98
Circovirus in geese and ducks can cause retarded growth and feather formation disturbances
T
99
Avian circoviruses do not cause clinical signs in domestic birds.
F
100
In ducks and geese, Avian circoviruses can cause retarded growth and immunosuppression
T
101
Avian circoviruses can spread via breeder eggs
T
102
Avian circoviruses do not cause disease in wild birds.
F
103
Avian circoviruses are species specific.
T
104
Avian circoviruses can infect many poultry species.
T
105
Avian circoviruses can cause retarded growth and immunosuppressio
T
106
Inactivated vaccines are used against pigeon circovirus infections.
F
107
Pigeon circovirus infections do not occur in Hungary, the disease is prevented by
vaccination.
F
108
Circoviruses can infect pigeons
T
109
Vaccines are available for Pigeon Circoviruses.
T-vac before race period
110
Clinical signs of PBFDV (Psittacine Beak and Feather Disease Virus) are only seen at time of moulting.
F
111
The chicken infectious anaemia virus is also commonly detected in goose.
F (only chicken!)
112
Anaemia and haemorrhages are two important clinical signs of chicken anaemia.
T
113
The chicken infectious anaemia is a chicken disease up to 1 month of age
T
114
The chicken infectious anaemia virus causes only anaemia
F
115
The chicken anaemia virus does not replicate in lymphoid progenitors
F
116
There are vaccines available against chicken anaemia
T
117
The chicken infectious anaemia is a disease of hens
F
Under 3w
118
The chicken infectious anaemia causes clinical signs similar to those seen in PDNS
F
119
Vertical infectious is not possible in chicken infectious anaemia
F (horizontal and vertical is possible)
120
Infection of day old chickens with the chicken anaemia virus leads to immune suppression
T
121
Chicken anaemia virus is transmitted both horizontally and vertically.
T
122
Atrophy of the thymus is a post mortem finding of Chicken Infectious Anaemia virus.
T
123
Infectious Chicken anaemia virus can cause clinical signs only in layer hens.
F
124
Infectious chicken anaemia virus causes clinical signs in chicken of 1 to 4 weeks of age.
T
125
For prevention of infectious chicken anaemia, live attenuated vaccine is available.
T
126
Infection of day-old chickens with the chicken anaemia virus leads to immune suppression.
T
127
Chicken anaemia virus infection can result in high mortality of chickens over 3 weeks of age.
F
128
In Chicken Infectious anaemia, most symptoms are observed in the first month.
T
129
Chicken Infectious anaemia involves destruction of the lymphoid and myeloid cells.
T
130
Chicken Infectious anaemia virus induces apoptosis of activated T-cells.
T
131
Pigeons can be infected by Chicken Infectious anaemia virus.
F
132
Chicken Infectious anaemia virus does not replicate in the thymus.
F
133
Chicken Infectious anaemia in day old chickens causes a long-lasting
immunosuppression.
T
134
Chicken Infectious anaemia virus is a Gyrovirus
T
135
Chicken anaemia virus infection can cause death of chickens below 3 weeks of age.
T
136
PDNS is caused by both PCV-1 and PCV-2.
F
137
PDNS is not caused by PCV
F(pcv2/3)
138
PDNS may develop without porcine circovirus 2
T-correct
139
PDNS can only be caused by circoviruses
F
140
PDNS is only caused by PCV-1
F
141
PDNS does not occur in Hungary
F
