Epi Mix AA 5201-5400 Flashcards
1
Q
West-Nile fever practically is restricted to Africa
A
f
2
Q
The most important maintaining hosts of West Nile fever virus are water birds
A
t
3
Q
Clinical signs of West Nile fever are most frequently seen in birds, horses and humans.
A
t
4
Q
Neurological signs develop only in a small percentage of the diseased animals
A
t
5
Q
West Nile fever occurs worldwide
A
t
6
Q
Vectors of West Nile fever virus are different mosquito species
A
t
7
Q
The host range of West Nile virus is very wide
A
t
8
Q
Humans are not susceptible to West Nile disease virus
A
f
9
Q
The sero-diagnostics of West Nile virus is complicated by cross-reactions with related flaviviruses
A
t
10
Q
The West Nile Virus is genetically uniform, but at least 15 serotypes are known
A
f
11
Q
Fomites play the most significant role in the transmission of the West Nile Virus.
A
f
12
Q
The principal vectors of the West Nile Virus are midges
A
f
13
Q
West Nile Virus mainly causes diarrhoea in sheep
A
f
14
Q
West Nile Virus cannot be isolated in cell cultures
A
f
15
Q
West Nile Virus is the only known zoonotic flavivirus
A
f
16
Q
The Japanese encephalitis virus causes abortion in swine
A
t
17
Q
The Wesselsbron disease causes meningoencephalitis in turkey
A
f
18
Q
The yellow fever virus causes liver damages
A
t
19
Q
The zika virus causes fever, rash and conjunctivitis in humans
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t
20
Q
BVDV can be frequently detected in the background of respiratory diseases
A
t
21
Q
BVD virus is particularly resistant to disinfectants
A
f
22
Q
Rodents play a central role in the maintenance of BVD virus in the environment
A
f
23
Q
Cytopathic and non-cytopathic biotypes of the Bovine Viral Diarrhoea (BVD) virus are known
A
t
24
Q
In utero infection with non-cytopathic BVDV can cause seropositivity of the newborn calf
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t
25
Non cytopathic strains of Bovine viral diarrhoea virus (BVDV) can cause hydrocephalus and cerebellar hypoplasia
f
26
In utero infection with non cytopathic BVDV can cause immunotolerance
t
27
In utero infection with cytopathic BVDV strain results immunotolerant calves
f
28
Swine are not susceptible to BVD
f
29
Two serotypes of the BVD virus are known so far, serotype 2 is more virulent
t
30
Pigs infected with BVDV turn seropositive to classical swine fever
t
31
Persistently infected cattle can maintain BVDV in a farm
t
32
Cytopathic strains of Bovine Viral diarrhoea (BVDV) alone can cause mucosal disease
f
33
Non-cytopathic BVD virus strain can mutate and become cytopathic
t
34
The BVD virus can infect pigs also
t
35
Cytopathic strains of the Bovine Viral Diarrhoea virus (BVDV) can cause abortion
t
36
Non cytopathic strains of Bovine Viral Diarrhoea virus (BVDV) do not cause transplacental infection
f
37
Intrauterine BVD virus infection always causes abortion
f
38
Cattle which are immune tolerant to BVD virus may develop mucosal disease
t
39
In sheep BVDV causes symptoms similar to border disease
t
40
Mucosal disease can develop in cattle persistently infected with BVDV
t
41
Non cytopathic strains of Bovine viral diarrhoea virus (BVDV) can cause immunosuppression
t
42
BVDV can be transmitted by semen
t
43
BVD virus cannot be transmitted via artificial insemination
f
44
In mucosal disease sharp edged, usually round or oval ulcers can be observed on the oral mucosa
t
45
In mucosal disease haemorrhages can be observed under the serosal surfaces and in the kidney cortex
t
46
Bloody diarrhoea is a clinical sign of the mucosal disease
t
47
BVD virus cannot be propagated in cell cultures
f
48
Mucosal disease usually emerges in cattle farms as explosive outbreaks with high morbidity
f
49
BVD and mucosal disease are caused by the same viral species
t
50
Attenuated vaccine strains against the bovine viral diarrhoea virus may have foetopathic effects
t
51
Eradication programmes against the bovine viral diarrhoea virus are usually based on the selection of immunotolerant animals
t
52
Eradication of BVD virus is based on the removal of immunotolerant animals
t
53
The only efficient way of BVD eradication is the replacement of all animals on the farm
f
54
Two genotypes of the BVDV are known
t
55
BVDV forms one serotype, but there are significant antigenic differences between the strains
t
56
Persistently infected animals play the major role in the maintenance and spread of BVDV
t
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BVDV infection may cause immunosuppression
t
58
Bovine neonatal pancytopenia (BNP) is an immunopathy observed in immunotolerant, BVDV infected calves
f
59
Bovine neonatal pancytopenia (BNP) is caused by a bovine viral diarrhea
f
60
The BVD virus typically damages endothelial-, epithelial- and lymphatic tissues
t
61
Wild birds are the natural hosts of the BVDV
f
62
Environmental contamination does not play a role in the spread of the BVDV
f
63
Only inactivated vaccines can be used for the prevention against BVD
f
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The BVD virus genotype 2 is less virulent than genotype 1
f
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BVD clinically is mostly seen in cattle from 6 to 24 months of age.
t
66
BVD virus can cause severe damage to fetuses in pregnant cows
t
67
Only cattle is susceptible to BVD virus
f
68
BVD virus exists in several serotypes
f
69
BVD infection of pregnant cows can result in delivery of immunotolerant persistently infected calves
t
70
Bulls can shed BVD virus for long time in semen, without showing any clinical sign
t
71
Both attenuated live and inactivated vaccines are used in eradication of BVD
t
72
BVDV is practically sensitive to disinfectants
t
73
Bovine Viral Diarrhoea cannot be transmitted with AI
f
74
Mucosal Disease, only inactivated vaccines can be used for the prevention against BVD
f
75
Cytopathic BVDV strains cause mucosal disease in immune-tolerant calves
t
76
Because Europe is free from BVD, it is forbidden to use vaccines against it
f
77
Because IBDV is an immunosuppressive virus, no vaccines available against it
f
78
The Border disease virus causes pneumonia in sheep
f
79
The border disease is present only in the United Kingdom
f
80
The border disease virus frequently causes encephalitis in ewes
f
81
Goats can be infected with border disease
t
82
Border disease in most frequently seen in horses
f
83
In utero border disease virus infection may cause immunotolerance
t
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The Border disease is a haemorrhagic, respiratory syndrome in sheep
f
85
Border disease of sheep is mainly characterized by foetal damages
t
86
Border disease appears as foetal damage in pregnant ewes
t
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Border disease is a respiratory and enteric disease of lambs
f
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Border disease occurs in Hungary
t
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Border disease causes abortion in ewes
t
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Border disease of sheep can be controlled by screening for carriers
t
91
Haemorrhagic enteritis is a characteristic pathological lesion of Classical swine fever
t
92
Classical Swine Fever is frequently complicated with bacterial infections
t
93
Classical swine fever virus can be transmitted by raw pork products
t
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Classical swine fever virus can retain its infectivity for 6 months in frozen meat
t
95
The CSFV may survive in frozen meat for months
t
96
During necropsy enlarged bloody lymph nodes can be seen in Classical swine fever cases
t
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Because of endothelial damage Classical swine fever results in haemorrhages
t
98
In acute Classical swine fever, at the beginning obstipation, later diarrhoea can be observed
t
99
Classical swine fever targets the bone marrow stem cells
t
100
Erysipelas and Porcine circovirus 2 infections may cause clinical signs and pathology lesions similar to CSF
t
101
Weakness of the hind legs and ataxia are clinical signs of Classical Swine Fever
t
102
Ischaemic infarcts at the edges of the spleen are postmortem lesions of subacute Classical Swine Fever
t
103
The boutons in the intestines are characteristic lesions in subacute Classical Swine Fever
t
104
Kidney haemorrhage is a characteristic lesion of Classical Swine Fever
t
105
Hemorrhages are the most typical lesions of acute CSF
t
106
During necropsy of acute Classical swine fever cases, haemorrhages can be seen in the gastric mucosa
t
107
Among Classical Swine Fever clinical signs CNS and eye problems can be observed
t
108
The CSFV causes central nervous signs only in suckling piglets
f
109
Classical swine fever infection during the first half of pregnancy results in the birth of immunotolerant piglets
t
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CSF infection during the first of half of pregnancy can lead to abortion
t
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Classical swine fever infection in the second half of the pregnancy leads to foetal development problems
f
112
Shedding of Classical swine fever virus starts 1 week after the infection
f
113
The shedding of CSFV begins 1-2 days after the appearance of clinical signs
t
114
The domestic swine population of most European countries are free from CSF
t
115
Classical swine fever causes oronasal infection
t
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Classical swine fever can be transmitted by mating
t
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CSF can cause transplacental infections
t
118
CSFV may case reproductive disorders
t
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Classical swine fever targets lymphatic tissues
t
120
CSF infections result in thrombocytopenia
t
121
Clinical signs of Classical Swine fever are mainly seen in 6-12 week old piglets in vaccinated herds
t
122
Classical swine fever infection during the first half of pregnancy can lead to abortion
t
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Wild boars play the main role in the maintenance of CSF virus in endemic areas
t
124
Wild boar may play a role in the maintenance and spread of CSFV
t
125
In Europe it is obligatory to vaccinate against Classical swine fever
f
126
In acute Classical swine fever skin haemorrhages and bloody nasal discharge can be observed
t
127
Normal sized spleen can be observed in uncomplicated cases of subacute Classical swine fever
t
128
Classical swine fever infection results in immunosuppression
t
129
All wild type strains of classical swine fever virus are highly virulent
f
130
Six distinct serotypes of CSF virus are recognized so far
f
131
CSF virus is an arbovirus
f
132
CSF virus is a zoonotic agent
f
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Pigs shed CSF virus only during the clinical stage of the disease
f
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Central nervous signs might be seen in classical swine fever
t
135
Based on pathology and clinical signs, chronic classical swine fever is easy to diagnose
f
136
Fomites do not play a role in the transmission of the Classical Swine Fever Virus
f
137
Swine shed CSFV only in the terminal phase of the disease
f
138
Europe is free from CSFV
f
139
Classical Swine Fever is always an acute disease with high mortality in wild boars
f
140
The large intestine are the earliest lesions in Classical Swine Fever
f
141
The diagnosis of Classical Swine Fever is based on paired serum investigations
f
142
Porcine circovirus 2 may cause lesions similar to Classical Swine Fever
t
143
Low virulence strains of CSFV may cause reproductive problems
t
144
CSFV may damage the lymphatic tissues and blood vessel endothelial cells
t
145
Swine can shed CSFV in the incubation period
t
146
Skin suffusions and haemorrhages are signs of Classical Swine Fever
t
147
Skin suffusions and haemorrhages are signs of Classical Swine Fever.
t
148
The clinical signs of African Swine Fever and Classical Swine Fever are very different
f
149
Contaminated pork meat can play a role in the transmission of CSFV.
t
150
Attenuated vaccines are developed for immunization of swine against CSFV
t
151
All known strains of the Classical Swine Fever virus are of highly virulence
f
152
The Classical Swine Fever may appear in a milder form in wild boar than in domestic swine
t
153
Classical swine fever virus is shed with faces, when boutons appear in the intestines
f
154
Classical swine fever can be eradicated from wild boar populations by oral vaccination
f
155
Classical swine fever virus is rarely complicated by secondary infections
f
156
Classical swine fever can be diagnosed easily by the characteristic symptoms and lesions
f
157
Acute classical swine fever can cause haemorrhagic pneumonia
t
158
Classical swine fever virus doesn't induce neutralizing antibody production
f
159
Classical swine fever virus is inactivated in chilled meat at -20°C
f
160
Classical swine fever virus can cause immunotolerance in swine
t
161
Only DIVA vaccines should be used to prevent classical swine fever in swine stocks
f
162
Classical swine fever virus causes lympho-histiocytic encephalitis in pigs
t
163
Classical swine fever virus causes lympho-histiocytic encephalitis in carnivores
f
164
Classical swine fever Virus spreads slowly in the host and causes mainly chronic disease
f
165
Complicated forms of the Classical swine fever are rarely seen
f
166
Classical swine fever can unambiguously diagnosed by the clinical signs and pathology
f
167
Low virulence strains of CSFV may lead to asymptomatic infection
t
168
CSF is spread via infected pigs
t
169
Sows infected by CSF will have immunotolerant piglets
(In first half of pregnancy yes but not in second half… so T and F)
170
Piglets of sows vaccinated against CSF are vaccinated at 6-12 months
f
171
To prevent CSF, we vaccinate pigs older than 6 months of age with live vaccine
f
172
To prevent CSF we use inactivated vaccines made from the Chinese strain
f
173
Shedding may start 2-3 days after first clinical signs
f
174
CSF can be prevented by inactivated vaccines
f
175
CSF can hardly be distinguished from African swine fever
t
176
CSF always causes abortion in pigs
f
177
Hungary does not have to make any preventative action against CSF
f
178
Incubation of CSF is 8-22 days
t
179
CSF was first written about in USA
t
180
First symptom of CSF is drooping ears
f
181
CSF virus has good resistance
t
182
Classical swine fever virus (CSFV) is mainly transmitted by mosquitoes
f
183
The presence of CSFV in a herd does not influence reproduction parameters
f
184
CSF is frequently complicated with bacterial infections
t
185
The clinical signs of CSF and ASF are similar
t
186
Central nervous signs are never seen in CSF
f
187
Serological cross reactions my occur between BVD virus and CSFV
t
188
Only inactivated vaccines are available against CSFV
?
189
CSF is a disease of domestic swine and wild boars, but several other species are also suceptible
f
190
Only domestic swine and wild boars are susceptible to CSF
t
191
Fever, anorexia haemorrhages in the skin and weakness of the hind legs are the most important signs of CSF
T
192
For prevention of CSF state medical steps and vaccination are used in Europe
f
193
The CSFV typically damages endothelial- and lymphatic tissues
t
194
In Europe vaccination of domestic pigs against Classical swine fever is common
f
195
Classical swine fever is a notifiable disease in Europe
t
196
In Europe vaccination of domestic swine populations against CSF is compulsory
f
197
Classical swine fever virus strains are classified into several serotypes
f
198
In subacute CSF we can observe signs of pneumonia during necropsies
t
199
Orbiviruses spread by droplet (aerosol) infection
f
200
Orbiviruses can be cultivated in vivo by inoculation of embryonated eggs
t
