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Epi > Epi Mt. 2 > Flashcards

Epi Mt. 2 Flashcards

1
Q

Several virulence variants of African Swine Fever Virus exist

A

T

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2
Q

African swine fever is shed in the saliva of the infected animals

A

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3
Q

Stamping out of the infected herds is applied in the control of African Swine Fever

A

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4
Q

In African swine fever cases of abortion are never observed

A

F

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5
Q

The leading clinical sign in African swine fever is excess salivation

A

F

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6
Q

In acute African swine fever the leading pathological findings are the haemorrhages

A

T

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7
Q

The African swine fever infects the swine per os

A

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8
Q

The African swine fever virus genome codes only 2 proteins

A

F

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9
Q

The African swine fever virus infects the swine by air

A

F

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10
Q

The primary replication site of African swine fever virus is the oronasal mucosa.

A

F

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11
Q

The tick species vectoring African swine fever are present in Portugal and Spain

A

T

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12
Q

The ASF virus is serologically uniform but several genotypes exist

A

T

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13
Q

In acute ASF we can observe high mortality in sows

A

T

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14
Q

Vaccines are available in EU to be used in the control of African swine fever

A

F

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15
Q

The African swine fever virus infects the swine by air

A

F

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16
Q

The African swine fever virus is highly resistant against the environmental conditions

A

T

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17
Q

The African swine fever causes hemadsorption in cell cultures

A

T

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18
Q

In the control of African swine fever thinning of the wild boar populations is helpful

A

T

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19
Q

ASF is always a peracute disease

A

F

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20
Q

ASF virus retains its infectivity for years in frozen meat

A

T

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21
Q

Picornaviridae are enveloped viruses

A

F

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22
Q

The resistance of Picornaviridae is low, they cannot survive in the environment

A

F

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23
Q

Asymptomatic animals can carry Teschovirus

A

T

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24
Q

Teschovirus is resistant, it remains infective in the faeces for a few weeks

A

T

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25
Q

Teschen and Talfan disease are caused by different virulence variants of the same virus

A

T

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26
Q

Dogs and cats can be infected with Teschen disease virus

A

F

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27
Q

Teschen disease virus can be present in pork meat

A

T

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28
Q

The virus of Teschen disease is shed in the faeces for several weeks after infection

A

T

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29
Q

The main clinical sign of Teschen disease in sheep is pneumonia

A

F

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30
Q

Lameness is a typical clinical sign of Teschen disease

A

T

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31
Q

Teschen disease occurs in cattle, sheep and pigs

A

F

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32
Q

Enteritis and pneumonia are frequent postmortem lesions of Teschen disease

A

F

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33
Q

Enlargement of the spleen and haemorrhages are typical postmortem lesions of Teschen disease

A

F

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34
Q

Teschen disease is frequent all over the world

A

F

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35
Q

The Teschen disease virus infects the animals per os

A

T

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36
Q

Inactivated vaccines are widely used in Europe to prevent Talfan disease

A

F

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37
Q

Talfan disease can be seen in animals below 4 months of age

A

T

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38
Q

Talfan disease is a disease of pigs

A

T

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39
Q

The clinical signs of Talfan disease are more severe than that of Teschen disease

A

F

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40
Q

Talfan disease occurs in any age groups

A

F

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41
Q

Inactivated vaccines are widely used in Europe to prevent Talfan disease

A

F

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42
Q

Haemorrhages are typical postmortem lesions of Talfan disease

A

F

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43
Q

Flaccid paralysis is a typical clinical sign of Talfan disease

A

T

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44
Q

Vesicles can be seen in the liver in the case of swine vesicular disease

A

F

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45
Q

Swine vesicular disease virus cannot cause viraemia

A

F

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46
Q

Swine vesicular disease is a zoonosis

A

T

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47
Q

Swine vesicular disease virus can cause vesicles on the snout of pigs

A

T

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48
Q

The resistance of swine vesicular disease virus is very low; it cannot survive in the environment

A

F

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49
Q

Haemorrhages in the serous membranes can be frequently seen postmotem in the case of swine
vesicular disease

A

F

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50
Q

The mortality of swine vesicular disease is 40-50%

A

F

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51
Q

Swine vesicular disease is frequently seen in Europe

A

F

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52
Q

Swine vesicular disease virus replicates in the epithelium of the throat and tonsils

A

T

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53
Q

Only pigs are susceptible to swine vesicular disease virus

A

T

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54
Q

The VES infection results in clinical signs similar to that of FMD

A

T

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55
Q

The VES virus can survive in water for 2 weeks

A

T

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56
Q

The primary source of VES infection is sea origin feed

A

T

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57
Q

VES causes the highest mortality in pregnant sows

A

F

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58
Q

VES causes mortality in piglets

A

T

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59
Q

VES is more contagious than FMD

A

F

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60
Q

Haemorrhages in the parenchymal organs are frequent postmortem lesions of avian
encephalomyelitis

A

F

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61
Q

There is germinative spread in the case of avian encephalomyelitis

A

T

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62
Q

Tremor is a typical clinical sign of avian encephalomyelitis

A

T

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63
Q

Germinative infection can happen in the case of duck hepatitis

A

F

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64
Q

Spasmodical paddling is a frequent clinical sign of duck hepatitis

A

T

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65
Q

The resistance of duck hepatitis A virus is high

A

T

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66
Q

Ducks are infected with the duck hepatitis A virus generally per os

A

T

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67
Q

Duck hepatitis cannot be prevented with vaccination

A

F

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68
Q

Duck hepatitis A virus is shed in the faeces

A

T

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69
Q

Encephalomyocarditis virus is shed in the faeces by infected animals

A

T

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70
Q

Encephalomyocarditis virus infects animals mainly per os

A

T

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71
Q

FMD is a chronic disease

A

F

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72
Q

FMD spreads slowly within the herd

A

F

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73
Q

FMD virus is shed by semen

A

T

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74
Q

Foot and mouth disease is serologically uniform

A

F

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75
Q

Because of the high variability of FMD virus cross protection cannot be observed even within the
serotype

A

T

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76
Q

Within the FMD serotypes, subtypes can be differentiated

A

T

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77
Q

The sample from the FMD suspected animal should be submitted to lab cooled but not frozen

A

T

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78
Q

FMD ulcers are usually sharp edged and regular round shaped

A

F

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79
Q

The foot and mouth disease is classified into 7 serotypes

A

T

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80
Q

FMD can be transmitted by frozen meat

A

T

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81
Q

The peracut form of FMD causes severe haemorrhages and death by shock

A

F

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82
Q

The chronic form of FMD means arthritis

A

F

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83
Q

FMD is transmitted by insect vectors

A

F

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84
Q

Vesicles of FMD can fully recover after immune response

A

T

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85
Q

FMD causes the loss of hoof in swine

A

T

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86
Q

The SAT-1,2 and 3 serotypes of FMD virus are present in Africa and Arabia

A

T

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87
Q

In humid cold environment, the FMD virus can retain its infectivity for weeks

A

T

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88
Q

Even the vaccinated animals can carry and shed the FMD virus

A

T

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89
Q

The main host (reservoir) of foot and mouth disease virus is swine

A

F

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90
Q

FMD induces lameness in sheep and oral vesicles in goats

A

T

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91
Q

FMD virus is shed in milk

A

T

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92
Q

For laboratory tests foot and mouth disease samples should be submitted in buffered transport
medium

A

T

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93
Q

Within the FMD serotypes, subtypes can be differentiated

A

T

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94
Q

The foot and mouth disease virus can retain its infectivity for 40 days in manure

A

T

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95
Q

In Europe supportive therapy is applied in the treatment of FMD

A

F

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96
Q

Frothy and sticky nasal discharge is the characteristic sign of FMD

A

F

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97
Q

Even the vaccinated animals can carry and shed the FMD virus

A

T

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98
Q

The hedgehog is susceptible to FMD

A

T

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99
Q

Because of high variability of FMD virus cross protection cannot be observed even within the
serotype

A

T

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100
Q

All serotypes of foot and mouth disease can be detected worldwide

A

F

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101
Q

For laboratory tests Foot and mouth disease samples should be submitted in buffered transport
medium

A

T

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102
Q

Foot and mouth disease is transmitted by insect vectors

A

F

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103
Q

Foot and mouth disease can cause myocarditis in young animals

A

T

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104
Q

Ruminants can carry foot and mouth disease virus for up to 3 years

A

T

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105
Q

The Asia serotype of FMD virus is present in Turkey and in the Middle East

A

T

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106
Q

The FMD virus is enveloped

A

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107
Q

FMD virus cannot be propagated in cell culture

A

F

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108
Q

24 hours after the inoculation of FMD virus into guinea pig paw pad vesicle formation can be
observed

A

T

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109
Q

The FMD mortality is nearly 100%

A

F

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110
Q

The FMD suspected sample should be sent to lab by post (in mail)

A

F

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111
Q

FMD virus can be transmitted by feed

A

T

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112
Q

The primary replication sites of foot and mouth disease are the lymph nodes

A

F

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113
Q

The primary replication sites of foot and mouth disease is the bone marrow

A

F

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114
Q

Horses are susceptible to foot and mouth disease

A

F

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115
Q

Cattle shed foot and mouth disease virus for a shorter time comparing to swine

A

F

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116
Q

The foot and mouth disease virus is very sensitive to the environmental conditions

A

F

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117
Q

Foot and mouth disease is transmitted by insect vectors

A

F

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118
Q

We can observe the most severe foot and mouth disease signs on sheep

A

F

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119
Q

In the control of foot and mouth disease vaccines are used in Europe

A

F

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120
Q

9 hours after infection foot and mouth disease virus can be shed by the infected animals

A

T

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121
Q

Swine shed foot and mouth disease virus for a shorter time than cattle

A

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122
Q

The foot and mouth disease virus is very sensitive to acidic pH

A

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123
Q

Calicivirus can cause persisting infections in the tonsils

A

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124
Q

Feline calicivirus is carried and shed by vaccinated animals too

A

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125
Q

The feline calicivirus is shed in excretes

A

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126
Q

The feline calicivirus infection can be recognised by the ulcers seen on the tongue

A

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127
Q

The feline calicivirus infection can cause the limping of kittens

A

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128
Q

RHD induces clinical signs mostly in animals younger than 2 months F

A

F

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129
Q

RHD virus is used for biological control of rural rabbits

A

T

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130
Q

RHD virus propagates in the liver of the infected animals

A

T

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131
Q

RHD virus can be propagated in cell culture

A

F

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132
Q

Vaccines against RHDV-1 induce protection against RHDV-2 too

A

F

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133
Q

The orthohepevirus A causes clinical symptoms only in human

A

T

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134
Q

The Orthohepevirus A can be zoonotic

A

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135
Q

The avian hepatitis E is a zoonotic disease

A

F

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136
Q

The avian hepatitis E causes drop in egg production

A

T

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137
Q

Avian nephritis is caused by astroviruses

A

T

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138
Q

The mortality of avian nephritis is 50-60%

A

T

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139
Q

Avian nephritis replicates in the gut

A

T

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140
Q

Broilers are regularly vaccinated against avian nephritis virus

A

F

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141
Q

Urate deposition is a postmortem lesion of avian nephritis

A

T

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142
Q

Clinical signs of avian nephritis can be seen in the first four weeks of life

A

T

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143
Q

Avian nephritis is more frequent in waterfowl than in chicken

A

F

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144
Q

Togaviruses are strongly resistant to the environmental conditions

A

F

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145
Q

Togaviruses are transmitted by mosquitoes

A

T

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146
Q

The clinical appearance of togavirus infection is dose dependent

A

T

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147
Q

Togaviruses cause airborne infection

A

F

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148
Q

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

A

F

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149
Q

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

A

F

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150
Q

Togavirus infection in horses results in hepatitis

A

F

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151
Q

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

A

T

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152
Q

Rodents serve as reservoirs for the Western equine encephalomyelitis virus

A

T

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153
Q

Equine encephalomyelitis viruses are zoonotic

A

T

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154
Q

Equine encephalomyelitis viruses can cause asymptomatic infections

A

T

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155
Q

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

A

F

156
Q

Horse encephalomyelitis viruses are transmitted by ticks

A

F

157
Q

Birds serve as reservoirs for the Eastern equine encephalomyelitis virus

A

T

158
Q

Equine encephalomyelitis viruses can cause lameness in horses

A

T

159
Q

Birds serve as reservoirs for Venezuelan horse encephalomyelitis virus

A

F

160
Q

Western equine encephalitis causes the highest mortality

A

F

161
Q

Equine encephalitis can be diagnosed easily by gross pathology

A

F

162
Q

In Venezuelan horse encephalitis enteric symptoms can be observed too

A

T

163
Q

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

A

F

164
Q

Equine encephalitis vaccines are available only for humans

A

F

165
Q

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

A

T

166
Q

Chikungunya virus is transmitted by the Asian tiger mosquito

A

T

167
Q

Serological cross reactions frequently occur between related flaviviruses

A

T

168
Q

Pestiviruses are zoonotic

A

F

169
Q

Pestiviruses are arboviruses

A

F

170
Q

Louping ill is seen in cattle in North America

A

F

171
Q

The louping ill was introduced to Austrailia to control rabbit population

A

F

172
Q

The louping ill is seen in cattle in Great Britain and Scandinavia

A

F

173
Q

The tick borne encephalitis is endemic in central Europe

A

T

174
Q

The main vectors of tick borne encephalitis virus are sylvatic mammalian species

A

F

175
Q

The tick borne encephalitis virus can be transmitted via consumption of raw milk

A

T

176
Q

Migratory birds play a role in the transmission of West Nile virus

A

T

177
Q

Mammals are mostly accidental hosts of West Nile Fever virus

A

T

178
Q

West Nile Fever is a notifiable disease

A

T

179
Q

In West Nile epidemics wild bird mortality is usually observed before horse and human cases can
be detected

A

T

180
Q

To prevent West Nile Fever, vaccine is available for horses

A

T

181
Q

The West Nile Fever can be diagnosed unambiguously by the clinical signs

A

F

182
Q

The West Nile Fever virus infects mostly swine and cattle F

A

F

183
Q

The West Nile virus may cause encephalitis in humans and in horses T

A

T

184
Q

Horses and humans do not play a significant role in the transmission of West Nile virus

A

T

185
Q

The West Nile fever epidemics occur usually at the end of summer and during Autumn

A

T

186
Q

West Nile fever is a notifiable disease

A

T

187
Q

The Japanese encephalitis virus causes abortion in swine

A

T

188
Q

The Wesselsbron disease causes meningoencephalitis in turkey

A

F

189
Q

The yellow fever virus causes liver damages

A

T

190
Q

The zika virus causes fever, rash and conjunctivitis in humans

A

T

191
Q

BVDV can be frequently detected in the background of respiratory diseases

A

T

192
Q

Cytopathic and non-cytopathic biotypes of the Bovine Viral Diarrhoea (BVD) virus are known

A

T

193
Q

In utero infection with non-cytopathic BVDV can cause seropositivity of the newborn calf

A

T

194
Q

Non cytopathic strains of Bovine viral diarrhoea virus (BVDV) can cause hydrocephalus and
cerebellar hypoplasia

A

F

195
Q

In utero infection with non cytopathic BVDV can cause immunotolerance

A

T

196
Q

Pigs infected with BVDV turn seropositive to classical swine fever

A

T

197
Q

Persistently infected cattle can maintain BVDV in a farm

A

T

198
Q

Cytopathic strains of Bovine Viral diarrhoea (BVDV) alone can cause mucosal disease

A

F

199
Q

The BVD virus can infect pigs also

A

T

200
Q

Cytopathic strains of the Bovine Viral Diarrhoea virus (BVDV) can cause abortion

A

T

201
Q

Non cytopathic strains of Bovine Viral Diarrhoea virus (BVDV) do not cause transplacental
infection

A

T

202
Q

Cattle which are immune tolerant to BVD virus may develop mucosal disease

A

T

203
Q

In sheep BVDV causes symptoms similar to border disease

A

T

204
Q

Mucosal disease can develop in cattle persistently infected with BVDV

A

T

205
Q

Non cytopathic strains of Bovine viral diarrhoea virus (BVDV) can cause immunosuppression

A

T

206
Q

BVDV can be transmitted by semen

A

T

207
Q

In mucosal disease sharp edged, usually round or oval ulcers can be observed on the oral mucosa

A

T

208
Q

In mucosal disease haemorrhages can be observed under the serosal surfaces and in the kidney
cortex

A

T

209
Q

Bloody diarrhoea is a clinical sign of the mucosal disease

A

T

210
Q

The Border disease virus causes pneumonia in sheep

A

F

211
Q

The border disease is present only in the United Kingdom

A

F

212
Q

The border disease virus frequently causes encephalitis in ewes

A

F

213
Q

Haemorrhagic enteritis is a characteristic pathological lesion of Classical swine fever

A

T

214
Q

Classical swine fever virus can be transmitted by raw pork products

A

T

215
Q

Classical swine fever virus can retain its infectivity for 6 months in frozen meat

A

T

216
Q

During necropsy enlarged bloody lymph nodes can be seen in Classical swine fever cases

A

T

217
Q

Because of endothelial damage Classical swine fever results in haemorrhages

A

T

218
Q

In acute Classical swine fever, at the beginning obstipation, later diarrhoea can be observed

A

T

219
Q

Classical swine fever targets the bone marrow stem cells

A

T

220
Q

Weakness of the hind legs and ataxia are clinical signs of Classical Swine Fever

A

T

221
Q

Ischaemic infarcts at the edges of the pleen are postmortem lesions of subacute Classical Swine
Fever

A

T

222
Q

The boutons in the intestines are characteristic lesions in subacute Classical Swine Fever

A

T

223
Q

Kidney haemorrhage is a characteristic lesion of Classical Swine Fever

A

T

224
Q

During necropsy of acute Classical swine fever cases, haemorrhages can be seen in the gastric
mucosa

A

T

225
Q

Among Classical Swine Fever clinical signs CNS and eye problems can be observed

A

T

226
Q

Classical swine fever infection during the first half of pregnancy results in the birth of
immunotolerant piglets

A

T

227
Q

Classical swine fever causes oronasal infection

A

T

228
Q

Classical swine fever can be transmitted by mating

A

T

229
Q

Classical swine fever targets lymphatic tissues

A

T

230
Q

Clinical signs of Classical Swine fever are mainly seen in 6-12 week old piglets in vaccinated herds

A

T

231
Q

Classical swine fever infection during the first half of pregnancy can lead to abortion

A

T

232
Q

In Europe it is obligatory to vaccinate against Classical swine fever

A

F

233
Q

In acute Classical swine fever skin haemorrhages and bloody nasal discharge can be observed

A

T

234
Q

Normal sized spleen can be observed in uncomplicated cases of subacute Classical swine fever

A

T

235
Q

Classical swine fever infection results in immunosuppression

A

T

236
Q

Orbiviruses spread by droplet (aerosol) infection

A

F

237
Q

Orbiviruses can be cultivated in vivo by inoculation of embryonated eggs

A

T

238
Q

Genetic reassortments may cause significant antigenic changes in reovirus strains

A

T

239
Q

Orbiviruses are serologically uniform

A

F

240
Q

Orthoreoviruses frequently cause tenosynovitis of horses

A

F

241
Q

Orthoreoviruses can cause pneumoenteritis in calves

A

T

242
Q

Avian orthoreoviruses cause mainly nephritis and encephalitis

A

F

243
Q

Infection of adult birds with orthoreoviruses usually remains subclinical

A

T

244
Q

Avian orthoreoviruses usually transmitted by germinative route

A

T

245
Q

Avian orthoreoviruses can cause damages in the bursa Fabricii

A

T

246
Q

Mammalian orthoreoviruses can cause pneumoenteritis only in suckling animals

A

F

247
Q

Rotaviruses are sensitive to environmental conditions

A

F

248
Q

Rotavirus infection is sporadic within the herd

A

F

249
Q

Rotavirus only infects mammals

A

F

250
Q

Clinical signs of rotavirus infection are usually seen in animals older than 2 weeks of age

A

F

251
Q

Swine is not susceptible to rotavirus infection

A

F

252
Q

Rotaviruses predispose to E.Coli infection in suckling piglets

A

T

253
Q

Rotaviruses are shed in the faeces in high titres

A

T

254
Q

Rotavirus infection results in high mortality

A

F

255
Q

Avian rotaviruses are transmitted by germinative infection

A

F

256
Q

Losses due to rotavirus infection of young animals can be prevented by colostrum feeding

A

T

257
Q

Rotaviruses usually cause enteritis in young (1-2 weeks old) animals

A

T

258
Q

Clinical signs of rotavirus infection are usually seen in animals older than 2 weeks of age

A

F

259
Q

Rotaviruses damage the mucosa of the large intestines

A

F

260
Q

Rotaviruses are serologically uniform

A

F

261
Q

Rotaviruses are typically transmitted via the faecal oral route

A

T

262
Q

Goats are not susceptible to bluetongue virus

A

F

263
Q

Ibaraki disease is clinically very similar to bluetongue

A

T

264
Q

Lameness is a frequent symptom of bluetongue in sheep

A

T

265
Q

Bluetongue virus can cause bloody diarrhoea in lambs

A

T

266
Q

Bluetongue is named after cyanosis of the tongue

A

T

267
Q

The bluetongue virus is vectored by midges/ gnats

A

T

268
Q

Cattle can carry the bluetongue virus for years without symptoms

A

T

269
Q

Wild birds play the most important role in the distribution of bluetongue

A

F

270
Q

In Europe vaccination of small ruminants against bluetongue is mandatory

A

F

271
Q

Rodents serve as reservoirs of bluetongue

A

F

272
Q

Bluetongue virus is also foetopathic

A

T

273
Q

Lameness and abortion are signs of bluetongue

A

T

274
Q

Bluetongue occurs only in Africa and Australia

A

F

275
Q

Bluetongue is transmitted by ticks

A

F

276
Q

Bluetongue can be transmitted by semen

A

T

277
Q

Goats are more resistant to the bluetongue than sheep T

A

T

278
Q

Vaccination against Bluetongue results serotype specific immunity T

A

T

279
Q

Bluetongue disease occurs only in Africa

A

F

280
Q

The epizootic haemorrhagic fever is observed in the USA in wild deer

A

T

281
Q

The Infectious equine arthritis and the African horse sickness ay have similar clinical signs

A

T

282
Q

Oedemas and haemorrhages are the most frequent lesions in African horse sickness

A

T

283
Q

African horse sickness is spread by ticks

A

F

284
Q

African horse sickness is zoonotic

A

F

285
Q

Frothy nasal discharge is a characteristic sign of African horse sickness

A

T

286
Q

The subacute form of African horses sickness is causing oedema formation and heart failure

A

T

287
Q

Encephalitis is the most frequent sign of African horse sickness

A

F

288
Q

Acute form of African horse sickness occurs mainly in zebras and horses

A

F

289
Q

Carnivores are susceptible to African horse sickness

A

T

290
Q

The natural reservoirs of the African horse sickness virus are mainly zebras

A

T

291
Q

Subcutaneous oedema is a frequent symptom of subacute African horse sickness

A

T

292
Q

African horse sickness is mostly a peracute disease

A

F

293
Q

Horse encephalosis is endemic in Africa

A

T

294
Q

Equine encephalosis can result in abortion

A

T

295
Q

Equine encephalosis is transmitted by mosquitoes

A

T

296
Q

Equine encephalosis causes the most severe clinical signs in Zebras

A

F

297
Q

Horse encephalosis occurs only in America

A

F

298
Q

Equine encephalosis causes high mortality

A

F

299
Q

Bursitis virus targets the premature B lymphocytes

A

T

300
Q

The bursitis virus causes per os infection

A

T

301
Q

Meat type hybrids are more sensitive to Gumboro disease than layers

A

F

302
Q

Clinical signs of Gumboro disease can be seen in chickens older than 8 weeks

A

F

303
Q

Some Gumboro disease vaccines can be applied only besides yolk immunity

A

T

304
Q

Watery diarrhoea is typical clinical sign of Gumboro disease

A

T

305
Q

There are several virulence variants of bursitis virus

A

T

306
Q

Clinical signs of Gumboro disease can be seen in chickens younger than 8 weeks

A

F

307
Q

Bursitis virus is highly contagious

A

T

308
Q

Immunocomplex vaccines can be applied to prevent Gumboro disease

A

T

309
Q

Clinical signs of Gumboro disease can be seen in chickens younger than 8 days

A

F

310
Q

Before vaccination against Gumboro disease the level of maternal immunity in the flock should
be determined

A

T

311
Q

Anaemia and cyanosis can be clinical signs of Gumboro disease

A

T

312
Q

Bursitis virus causes the highest mortality in day old chicks

A

F

313
Q

Viruses are available to control Gumboro disease

A

T

314
Q

The bursitis virus is very sensitive to the environmental conditions

A

F

315
Q

Bursitis virus causes disease only in chicken

A

F

316
Q

The bursitis virus can retain its infectivity for 1-4 months in the litter

A

T

317
Q

Both serotypes of bursitis virus are pathogenic

A

F

318
Q

Bursitis virus infection can reduce the efficacy of vaccinations

A

T

319
Q

Bursitis virus infection results in immunosuppression

A

T

320
Q

Bursitis virus is shed in the faeces

A

T

321
Q

Influenzaviruses have segmented genome

A

T

322
Q

HPAI and LPAI strains differ in the number of basal amino acids in the HA protein

A

T

323
Q

HA protein of influenza viruses is responsible for the attachment to the cell

A

T

324
Q

Antigenic drift means serials of point mutations in the HA and NA genes

A

T

325
Q

The NA protein in the influenza virus is responsible for the release from the infected cells

A

T

326
Q

Enzymatic cleavage of the HA protein is needed for the influenza virus penetration into the cell

A

T

327
Q

Genetic reassortment of human and animal influenza viruses result in the occurrence of new
human influenza strains

A

T

328
Q

Bats have an important role in the epidemiology of influenza

A

F

329
Q

Antigenic shift is behind the influenza pandemics

A

T

330
Q

Influenza viruses are classified into genera by their HA and NA proteins

A

F

331
Q

Influenza causes persistent infection in donkey

A

F

332
Q

The serotype of influenza viruses is determined by their HA and NA proteins

A

T

333
Q

The influenza viruses cause respiratory signs in sea mammals

A

T

334
Q

The host range of influenza virus is determined by the NA protein

A

F

335
Q

The bird to human host switch of influenza virus is mediated by swine

A

T

336
Q

The main host of influenza is the swine

A

F

337
Q

In humans inactivated vaccines are used for the immunisation against influenza

A

T

338
Q

Antigenic drift is behind the seasonal influenza epidemics

A

T

339
Q

Antigenic shift means the reassortment of the influenzavirus genome segments

A

T?

340
Q

Influenzaviruses are sensitive to drying out

A

T

341
Q

For the in vitro propagation of influenza viruses embryonated eggs is used

A

T

342
Q

The high virulence of some influenza A viruses is the result of mutations in the HA gene

A

T

343
Q

Influenza viruses are classified into genera by their HA and NA proteins

A

F

344
Q

25) The HPAI strains can cause CNS Signs T

A

T

345
Q

26) HPAI causes blood vessel damages and generalised infections T

A

T

346
Q

27) The HPAI strains are usually developed from the H5 and H7 influenza viruses T

A

T

347
Q

28) The LPAI causes immunosuppression T

A

T

348
Q

29) Cat is susceptible to human seasonal influenza

A

F

349
Q

Swine recovered from influenza should not be kept for breeding

A

T

350
Q

Influenza causes high morbidity but low mortality in swine

A

T

351
Q

The HPAI causes skin haemorrhages in swine

A

F

352
Q

Swine influenza outbreaks occur usually during summer

A

F

353
Q

In a horse influenza outbreak all infected horses must be killed

A

F

354
Q

The generalized symptoms of horse influenza are result of the interferon response

A

T

355
Q

Racehorses should be vaccinated before the influenza season

A

F

356
Q

Breeding mares should be vaccinated before the influenza season

A

F

357
Q

The eggs produced in LPAI infected flock can be hatched

A

T

358
Q

The HPAI infection can be unambiguously differentiated from Newcastle disease by the clinical
signs

A

F

359
Q

The HPAI strains can cause clinical signs in waterfowl

A

T

360
Q

In poultry farms LPAI may be endemic without clinical signs

A

T

361
Q

Waterfowl can carry the influenza viruses for long time

A

T

362
Q

Influenza viruses are shed by birds exclusively in the nasal discharge

A

F

363
Q

Avian influenza is zoonotic

A

T

364
Q

The virulence of avian influenza is determined by the i.v. pathogeny index and mortality

A

T

365
Q

Avian influenza can switch directly to human and cause epidemics with high case numbers as
result of human to human transmission

A

F

366
Q

All Bunyaviruses are transmitted by mosquitoes

A

F

367
Q

Bunyaviruses cause oral infection

A

F

368
Q

The virus causing severe fever and thrombocytopenia syndrome is transmitted by tick

A

T

369
Q

The Aino virus causes foetal development problems and abortion in sheep

A

T

370
Q

Akabane virus is zoonotic

A

F

371
Q

Akabane virus causes foetal damages in dogs

A

F

372
Q

Schmallenberg virus causes disease only in Suffolk sheep breed

A

F

373
Q

Schallenberg virus causes foetal damages in humans

A

F

374
Q

Schmallenberg virus causes foetal development problems more frequently in cattle than in sheep

A

T

375
Q

Schmallenberg virus is present worldwide

A

F

376
Q

Human is a competent host of Rift Valley fever virus i.e. the viraemic titre is high enough to infect
the vector

A

T

377
Q

The Rift valley fever virus damages the blood vessels thus causes haemorrhages

A

T

378
Q

Wild rabbits are reservoirs of Rift valley fever virus

A

F

379
Q

Rift valley fever is a human only disease

A

F

380
Q

Nairobi sheep disease causes generalized infection in the animals

A

T

381
Q

Vaccines are available in endemic regions to prevent Nairobi sheep disease

A

T

382
Q

Nairobi sheep disease leads to abortion in the infected pregnant animals

A

T

383
Q

Nairobi sheep disease causes haemorrhagic enteritis in the infected animals

A

T

384
Q

Small rodents serve as reservoir hosts of Hantaviruses

A

T

385
Q

Hantaviruses can cause renal failure in human

A

T

386
Q

The Crimean-congo haemorrhagic fever is a human disease with headache, muscle pain and skin
haemorrhages

A

T

Epi (1 decks)

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