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EPI PQ > Arteriviruses > Flashcards

Arteriviruses Flashcards

(107 cards)

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1
Q

Arterivirus, the virulence is highly variable

A

T

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2
Q

The equine viral arteritis is caused by an arterivirus.

A

T

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3
Q

Serological tests can NOT be used for laboratory detection of equine viral arteritis

A

F

  • Serology: VN (1:4), ELISA (gp5)
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4
Q

ed blood cells can be used for laboratory detection of equine viral arteritis virus

A

F

Samples: nasal fluid, WBC, semen, caul

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5
Q

Nasal fluid can be used for laboratory detection of equine viral arteritis virus

A

T

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6
Q

A semen sample can be used for laboratory detection of equine viral arteritis virus

A

T

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7
Q

Equine arteritis virus is very resistant to physical damages

A

F
Low resistance in environment

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8
Q

Equine viral arteritis is usually asymptomatic

A

T

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9
Q

In cases of equine viral arteritis, the rate of seroconverted animals increases with age

A

T

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10
Q

The main target cells of equine viral arteritis are macrophage

A

T

Replication: Macrophages, endothelialcells, vascular smooth muscle cells

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11
Q

Equine Viral arteritis (EVA) virus can affect donkeys

A

T

horses, ponies, donkeys and zebras (South american Camelids)

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12
Q

The persistence of EVA virus within one herd is usually caused by the stallions

A

T

persistent infection in mature animals

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13
Q

EVA is transmitted by sexual and aerogenic pathways

A

T

sexual transmission: 1 week

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14
Q

After EVA virus infection, mortality rate is low

A

T

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15
Q

Equine arteritis virus is very resistant to physical damage

A

F

Low resistance in environment

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16
Q

Equine viral arteritis is usually asymptomatic

A

T

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17
Q

The main target cells of equine viral arteritis virus are macrophages

A

T

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18
Q

EVA can affect donkeys

A

T

horses, ponies, donkeys and zebras

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19
Q

EVA can cause persistent virus carrying.

A

T

persistent infection in mature animals

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20
Q

After EVA infection mortality rate is low

A

T

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21
Q

Equine Viral Arteritis virus can infect by inhalation

A

T

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22
Q

Vaccine against Equine Viral Arteritis is never used in Europe

A

F
Inactivated (in EU) 2X

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23
Q

The Equine Viral Arteritis is caused by retrovirus

A

F

Arteriviridae Family

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24
Q

The equine viral arteritis virus cannot damage the wall of blood vessel

A

F

Damage of blood vessel walls (inflammation in the endothel and media)

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25
The equine viral arteritis virus usually causes asymptomatic infection
T
26
The equine viral arteritis virus can cause persistent infections
T persistent infection in mature animals
27
The equine viral arteritis virus always causes clinical symptoms
F - usually asymptomatic
28
EVA is spread by insect vectors
F venereal, nasal (per os)
29
Equine viral arteritis causes reproductive problems/impotence in stallions.
T
30
Acute equine viral arteritis is similar to Equine infectious anaemia
T
31
Equine viral arteritis in mare is reactivated in pregnancy
F
32
Equine viral arteritis, aborted embryos have degenerated liver
F - Fibrinoid degeneration - inflammation and thrombus formation in small blood vessels - Interlobular interstitial pneumonia - Fibrinoid-necrotic enteritis
33
Mares are frequently life-long carriers of the Equine arteritis virus.
F Stallions: long term carriers (10-70%)
34
Subcutaneous oedema is a frequent sign of equine viral arteritis
T
35
Pregnant mares usually abort in the acute phase of equine viral arteritis
T
36
Equine viral arteritis is diagnosed by agarose-gel immunodiffusion (Coggins test)
F - Clinical signs, pathology - Samples: nasal fluid, WBC, semen, caul - Isolation (CPE), IF, IHC, RT-PCR (semen) - Serology: VN (1:4), ELISA (gp5)
37
The Equine arteritis virus may cause abortion in pregnant mares
T
38
Vaccination of colts before puberty can prevent the development of EAV-carrier status
T
39
Stallions may be long-term carriers of the Equine arteritis virus
T Stallions: long term carriers (10-70%), semen (for years),
40
Conjunctivitis and subcutaneous oedema are possible signs of equine viral arteritis.
T
41
Equine viral arteritis virus can infect through nasal route
T
42
Equine viral arteritis virus can infect per os
T
43
Equine viral arteritis virus can infect through venereal way.
T venereal, nasal (per os)
44
Equine viral arteritis virus can infect only by arthropods
F venereal, nasal (per os)
45
Equine arteritis virus is a uniform virus without serotypes, subtypes etc
F 1 serotype
46
Aerogenic infection can happen in the case of equine arteritis virus
T
47
Equine arteritis virus is shed in the semen
T
48
Equine arteritis virus can cause abortion
T
49
Equine arteritis virus is very resistant to physical damage
F Low resistance in environment
50
In case of equine viral arteritis, the rate of seroconverted animals increases with age
T
51
Lameness due to inflammatory joints is the most typical sign of Equine infectious arteritis
F
52
Equine infectious arteritis is a notifiable disease; therefore vaccinations are forbidden
F - Inactivated (in EU) 2X - Attenuated =MLV (in USA, Canada) - Eradication
53
The persistence of equine viral arteritis virus within one herd is usually caused by the stallions
T
54
Equine viral arteritis is transmitted by a sexual and aerogenic pathways
T
55
After equine viral arteritis virus infection, mortality rate is low
T
56
Equine infectious arteritis is a notifiable disease
T
57
The main target of Equine viral arteritis virus is macrophages.
T
58
Equine infectious arteritis is stenoxen viruses
F
59
Equine viral arteritis can be controlled in part by removing long-term carriers
T
60
Equine viral arteritis can affect donkeys
T - horses, ponies, donkeys and zebras
61
PRRS is caused by an arterivirus.
T
62
PRRS is caused by a coronavirus
F - arterivirus.
63
The clinical signs of PRRS can be abortion like that of SMED
T - Respiratory in young - Abortion, return to estrus in sows
64
Isolation of PRRS in cell culture can be easily performed in any laboratory
F
65
PRRS has only highly pathogenic variants
F
66
Respiratory signs of PRRS occur just in sows
F
67
PRRS virus replicates in macrophages
T
68
PRRS virus replicates in T-lymphocytes
F
69
The pathological signs of PRRS is typical because the lymph nodes are never enlarged
F Periocular edema, interstitial pneumonia, enlarged lymph nodes
70
PRRS virus affects the respiratory system in young piglets
T
71
PRRS cause digestive sign in adult
F
72
PRRS has 2 phases
T
73
PRRS cause respiratory sign in adult
F
74
Target cells of PRRSV are alveolar epithelial cells
F
75
PRRS can only be isolated in porcine kidney cells.
F
76
PRRS causes immune suppression in prolonged cases
F
77
Attenuated and inactivated vaccines are available against PRRS
T
78
PRRS virus causes severe intestinal problems in adult pigs
F Periocular edema, interstitial pneumonia, enlarged lymph nodes
79
PRRS is characterized by respiratory disease in adult pigs
F
80
PRRS infection has 2 clinical phases
T
81
PRRSV attacks the active macrophages
T
82
For PRRS prevention we can get a very good immunization with inactivated vaccines
F
83
PRRS: reproductive and respiratory problems and others with other virulence
T
84
Maternal immunity protects only short time against PRRS
T
85
Porcine reproductive and respiratory virus (PRRSV) can cause abortion only in the advanced stage of pregnancy (over 90 days).
F
86
Only inactivated vaccines can be used for the prevention against PRRSV
F - vaccination - eradication
87
Porcine reproductive and respiratory virus (PRRSV) propagates in lymphatic cells
T
88
PRRSV infection may influence the reproductive performance of boars
T
89
Porcine reproductive and respiratory virus (PRRSV) is a zoonotic agent
F
90
Porcine parvoviruses and PRRSV may cause similar disease in sows
T
91
Porcine reproductive and respiratory vines (PRRSV) does not cause clinical signs in boars.
F
92
Inactivated vaccines alone cannot induce protective immunity against PRRSV
T
93
Boars can transmit porcine reproductive and respiratory syndrome virus in the semen
T
94
Porcine reproductive and respiratory syndrome virus cannot cause abortion, only infertility of the sows
F
95
There are no vaccines for the prevention of Porcine reproductive and respiratory syndrome.
F
96
The blue ear disease is caused by dog coronavirus
F PRRS
97
The blue ear disease is caused by FIP
F - PRRS
98
The blue ear disease is caused by chicken coronavirus.
F - PRRS
99
The blue ear disease is caused by PRRS
T
100
Does PRRS virus have 3 genotypes.
F - 2 Genotypes
101
Oedema can be a sign of PRRS.
T
102
PRRS is deadly in adult animals
F
103
Target cells of PRRSV are alveolar epithelial cells.
F - macrophage
104
PRRS virus can only be isolated in porcine kidney cell culture
F
105
The Porcine reproductive and respiratory syndrome (PRRS) is only present in NorthAmerica
F
106
The PRRS virus may cause reproductive problems in boars
T
107
PRRS: cyanosis is one clinical symptom
F - Simian Hemorrhagic Fever Virus

EPI PQ (83 decks)

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