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EPI 1 > Togavirus > Flashcards

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
Q

Recovery from equine horse encephalitis induces immunity that lasts only 1 year

A

False

26
Q

Equine encephalitis vaccines are available only for humans

A

False

27
Q

An early sign of Eastern encephalomyelitis is biphasic fever

A

True

28
Q

Eastern equine encephalomyelitis virus infects only horses

A

False

29
Q

Mosquitoes are the principle vectors of equine encephalomyelitis viruses

A

True

30
Q

Equine encephalomyelitis can cause abortion in human

A

True

31
Q

Wild birds are involved in the transmission cycle of eastern equine encephalomyelitis

A

True

32
Q

Ticks are involved in the transmission cycle of EEE

A

False

33
Q

Viral equine encephalomyelitis is usually diagnosed on the basis of clinical signs

A

False

34
Q

In endemic countries vaccines are available against equine viral encephalomyelitis

A

True

35
Q

Some strains of Venezuelan horse encephalitis virus can be transmitted from horse to other
hosts

A

True

36
Q

Vaccination of horses in the Americas is used to prevent togavirus infections

A

True

37
Q

The Equine encephalitis virus may cause abortion

A

True

38
Q

The Eastern Equine Encephalitis is present in Japan and Korea

A

False

39
Q

Mosquitoes are the principal vectors of the Western Equine encephalitis

A

True

40
Q

No characteristic gross pathology lesions are seen in Equine encephalitis caused by
Togaviruses.

A

True

41
Q

Eastern, Western and Venezuelan Equine encephalitis viruses are zoonotic agents

A

True

42
Q

Togaviruses caused encephalomyelitis of horses occurs frequently worldwide

A

False

43
Q

The host range of horse encephalomyelitis togaviruses is wide

A

True

44
Q

American horse encephalomyelitis most frequently cause clinical signs is birds, horses and
humans

A

True

45
Q

Humans are not susceptible to horse encephalomyelitis togaviruses

A

False

46
Q

American horse encephalomyelitis viruses represent several types and subtypes

A

True

47
Q

Vectors of American horse encephalomyelitis Togaviruses are mosquitoes

A

True

48
Q

Main means of control of American borse encephalomyelitis are mosquito control and
vaccines

A

True

49
Q

Vaccines cannot be used to prevent Togaviruses caused encephalomyelitis of horse

A

False

50
Q

An early sign of Eastern encephalomyelitis is biphasic fever

A

True

51
Q

Mainly ticks are the vectors of Equine encephalomyelitis viruses

A

False

52
Q

Serological cross-reactions are seen between certain encephalomyelitis viruses

A

True

53
Q

Equine encephalomyelitis viruses cause disease in horse populations worldwide

A

False

54
Q

Equine encephalomyelitis outbreaks are usually emerging in summer or rainy seasons

A

True

55
Q

After recovery from acute viral encephalomyelitis permanent lesions may remain in horses

A

True

56
Q

The equine encephalomyelitis viruses are zoonotic agents

A

True

57
Q

Togavirus infections can unambiguously be diagnosed based on clinical signs and pathology

A

False

58
Q

In Europe vaccination of horses against equine encephalomyelitis is compulsory

A

False

59
Q

Togavirus infection results in abortion of horses

A

False

60
Q

Horse encephalitis occurs only in America

A

False

61
Q

Chikungunya virus causes joint pains, fever, rash and haemorrhages in humans

A

True

62
Q

Chikungunya virus is transmitted by the Asian tiger mosquito

A

True

EPI 1 (56 decks)

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