Togavirus Flashcards

1
Q

Togaviruses are strongly resistant to the environmental conditions

A

False

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2
Q

Togaviruses are transmitted by mosquitoes

A

True

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3
Q

The clinical appearance of togavirus infection is dose dependent

A

True

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4
Q

Togaviruses cause airborne infection

A

False

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5
Q

Togaviruses cause encephalomyelitis in horses in East-Asia and in Australia only

A

False

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6
Q

Several togaviruses are zoonotic agents

A

True

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7
Q

No vaccines are available against togaviruses

A

False

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8
Q

Horse encephalomyelitis viruses are transmitted by ticks

A

False

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9
Q

Abortion is the main clinical sign of togavirus infection results in abortion of horses

A

False

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10
Q

The leading clinical sign of togavirus infection is the frothy nasal discharge

A

False

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11
Q

Togavirus infection in horses results in hepatitis

A

False

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12
Q

In the geographic distribution of equine togavirus migratory birds have an important role

A

True

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13
Q

Rodents serve as reservoirs for the Western equine encephalomyelitis virus

A

True

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14
Q

Rodents serve as reservoirs for Venezuelan horse encephalomyelitis virus

A

True

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15
Q

Equine encephalomyelitis viruses are zoonotic

A

True

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16
Q

Equine encephalomyelitis viruses can cause asymptomatic infections

A

True

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17
Q

Horses encephalomyelitis vaccines defend against African horse sickness (cross protection)

A

False

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18
Q

Horse encephalomyelitis viruses are transmitted by ticks

A

False

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19
Q

Birds serve as reservoirs for the Eastern equine encephalomyelitis virus

A

True

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20
Q

Equine encephalomyelitis viruses can cause lameness in horses

A

True

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21
Q

Birds serve as reservoirs for Venezuelan horse encephalomyelitis virus

A

False

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22
Q

Western equine encephalitis causes the highest mortality

A

False

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23
Q

Equine encephalitis can be diagnosed easily by gross pathology

A

False

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24
Q

In Venezuelan horse encephalitis enteric symptoms can be observed too

A

True

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25
Recovery from equine horse encephalitis induces immunity that lasts only 1 year
False
26
Equine encephalitis vaccines are available only for humans
False
27
An early sign of Eastern encephalomyelitis is biphasic fever
True
28
Eastern equine encephalomyelitis virus infects only horses
False
29
Mosquitoes are the principle vectors of equine encephalomyelitis viruses
True
30
Equine encephalomyelitis can cause abortion in human
True
31
Wild birds are involved in the transmission cycle of eastern equine encephalomyelitis
True
32
Ticks are involved in the transmission cycle of EEE
False
33
Viral equine encephalomyelitis is usually diagnosed on the basis of clinical signs
False
34
In endemic countries vaccines are available against equine viral encephalomyelitis
True
35
Some strains of Venezuelan horse encephalitis virus can be transmitted from horse to other hosts
True
36
Vaccination of horses in the Americas is used to prevent togavirus infections
True
37
The Equine encephalitis virus may cause abortion
True
38
The Eastern Equine Encephalitis is present in Japan and Korea
False
39
Mosquitoes are the principal vectors of the Western Equine encephalitis
True
40
No characteristic gross pathology lesions are seen in Equine encephalitis caused by Togaviruses.
True
41
Eastern, Western and Venezuelan Equine encephalitis viruses are zoonotic agents
True
42
Togaviruses caused encephalomyelitis of horses occurs frequently worldwide
False
43
The host range of horse encephalomyelitis togaviruses is wide
True
44
American horse encephalomyelitis most frequently cause clinical signs is birds, horses and humans
True
45
Humans are not susceptible to horse encephalomyelitis togaviruses
False
46
American horse encephalomyelitis viruses represent several types and subtypes
True
47
Vectors of American horse encephalomyelitis Togaviruses are mosquitoes
True
48
Main means of control of American borse encephalomyelitis are mosquito control and vaccines
True
49
Vaccines cannot be used to prevent Togaviruses caused encephalomyelitis of horse
False
50
An early sign of Eastern encephalomyelitis is biphasic fever
True
51
Mainly ticks are the vectors of Equine encephalomyelitis viruses
False
52
Serological cross-reactions are seen between certain encephalomyelitis viruses
True
53
Equine encephalomyelitis viruses cause disease in horse populations worldwide
False
54
Equine encephalomyelitis outbreaks are usually emerging in summer or rainy seasons
True
55
After recovery from acute viral encephalomyelitis permanent lesions may remain in horses
True
56
The equine encephalomyelitis viruses are zoonotic agents
True
57
Togavirus infections can unambiguously be diagnosed based on clinical signs and pathology
False
58
In Europe vaccination of horses against equine encephalomyelitis is compulsory
False
59
Togavirus infection results in abortion of horses
False
60
Horse encephalitis occurs only in America
False
61
Chikungunya virus causes joint pains, fever, rash and haemorrhages in humans
True
62
Chikungunya virus is transmitted by the Asian tiger mosquito
True