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