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Epidemiology - MIDTERM 3 PQS > PQS - Classical Swine Fever > Flashcards

PQS - Classical Swine Fever Flashcards

1
Q

Haemorrhagic enteritis is a characteristic pathological lesion of Classical swine fever

A

T

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2
Q

Classical Swine Fever is frequently complicated with bacterial infections.

A

T

damage of the immune system → bacterial complications

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3
Q

Classical swine fever virus can be transmitted by raw pork products

A

T

live, infected animals
raw pork meat, pork products
raw pork wastes -slaughter
fomites
humans
wild boar!

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4
Q

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

A

T

months or even years!

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5
Q

The CSFV may survive in frozen meat for months

A

T

months or even years!

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6
Q

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

A

T

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7
Q

Because of endothelial damage Classical swine fever results in haemorrhages

A

T

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8
Q

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

A

T

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9
Q

Classical swine fever targets the bone marrow stem cells

A

T

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10
Q

Erysipelas and Porcine circovirus 2 infections may cause clinical signs and pathology lesions similar to CS

A

T

also African swine fever

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11
Q

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

A

T

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12
Q

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

A

T

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13
Q

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

A

T

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14
Q

Kidney haemorrhage is a characteristic lesion of Classical Swine Fever

A

T

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15
Q

Hemorrhages are the most typical lesions of acute CSF

A

T

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16
Q

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

A

T

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17
Q

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

A

T

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18
Q

The CSFV causes central nervous signs only in suckling piglets

A

F

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19
Q

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

A

T

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20
Q

CSF infection during the first of half of pregnancy can lead to abortion

A

T

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21
Q

Shedding of Classical swine fever virus starts 1 week after the infection

A

F

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22
Q

The shedding of CSFV begins 1-2 days after the appearance of clinical signs

A

F

Shedding starts before onset of clinical signs

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23
Q

The domestic swine population of most European countries are free from CSF

A

T

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24
Q

Classical swine fever causes oronasal infection

A

T

Oronasal route (skin, wounds, conjunctiva, insemination,
fomite contact)

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25
Classical swine fever can be transmitted by mating
T Horizontal transmission direct /indirect contact
26
CSF can cause transplacental infections
T
27
CSFV may case reproductive disorders
T
28
Classical swine fever targets lymphatic tissues
T
29
CSF infections result in thrombocytopenia
T damage to the bone marrow stem cells → thrombocytopenia
30
Clinical signs of Classical Swine fever are mainly seen in 6-12 week old piglets in vaccinated herds
T
31
Classical swine fever infection during the first half of pregnancy can lead to abortion
T
32
Wild boars play the main role in the maintenance of CSF virus in endemic areas
T
33
Wild boar may play a role in the maintenance and spread of CSFV
T
34
In Europe it is obligatory to vaccinate against Classical swine fever
F Vaccination: In CSF-free countries, the preventive immunisation is forbidden
35
In acute Classical swine fever skin haemorrhages and bloody nasal discharge can be observed
T
36
Normal sized spleen can be observed in uncomplicated cases of subacute Classical swine fever
T
37
Classical swine fever infection results in immunosuppression
T
38
All wild type strains of classical swine fever virus are highly virulent
F
39
Six distinct serotypes of CSF virus are recognized so far
F **1 serotype, 3 genotypes and 4 subtypes**
40
CSF virus is an arbovirus
F **Oronasal transmission**
41
CSF virus is a zoonotic agent
F
42
Pigs shed CSF virus only during the clinical stage of the disease
F
43
Central nervous signs might be seen in classical swine fever
T
44
Based on pathology and clinical signs, chronic classical swine fever is easy to diagnose
F
45
In vaccinated herds we mostly see the CSF clinical signs in 6-12 weeks old piglets
T
46
Fomites do not play a role in the transmission of the Classical Swine Fever Virus
F Oronasal route (skin, wounds, conjunctiva, insemination, fomite contact)
47
Transplacental infection with CSFV may cause immunotolerance in new-born piglets
T
48
Swine shed CSFV only in the terminal phase of the disease
F 1- 3 months
49
Europe is free from CSFV
F
50
Classical Swine Fever is always an acute disease with high mortality in wild boars
F **low mortality**
51
The large intestine are the earliest lesions in Classical Swine Fever
F Paracute: - brain lymphocytic infiltration - +/- fine haemorrhage in the kidney cortex
52
The diagnosis of Classical Swine Fever is based on paired serum investigations
F - RTqPCR - Virus isolation - IH - IF - ELISA
53
Porcine circovirus 2 may cause lesions similar to Classical Swine Fever
T
54
Low virulence strains of CSFV may cause reproductive problems
T??
55
CSFV may damage the lymphatic tissues and blood vessel endothelial cells
T
56
Swine can shed CSFV in the incubation period
T
57
Skin suffusions and haemorrhages are signs of Classical Swine Fever.
T
58
The clinical signs of African Swine Fever and Classical Swine Fever are very different
F
59
Contaminated pork meat can play a role in the transmission of CSFV
T
60
Attenuated vaccines are developed for immunization of swine against CSFV
T
61
All known strains of the Classical Swine Fever virus are of highly virulence
F
62
The Classical Swine Fever may appear in a milder form in wild boar than in domestic swine
T
63
Erysipelas and Porcine circovirus 2 infections may cause clinical signs and pathology lesions similar to Classical Swine Fever
T
64
Classical swine fever virus is shed with faces, when boutons appear in the intestines
F - sheds prior to appearance of clinical signs
65
Classical swine fever can be eradicated from wild boar populations by oral vaccination.
F Experimental, oral vaccination of wild boars in Germany and in Slovakia
66
Classical swine fever virus is rarely complicated by secondary infections
F
67
Classical swine fever can be diagnosed easily by the characteristic symptoms and lesions
F
68
Domestic swine stocks are free of classical swine fever in most of the European countries
T
69
Acute classical swine fever can cause haemorrhagic pneumonia
T
70
Classical swine fever virus doesn't induce neutralizing antibody production
F
71
Classical swine fever virus is inactivated in chilled meat at -20°C.
F
72
Classical swine fever virus can cause immunotolerance in swine
T
73
.Only DIVA vaccines should be used to prevent classical swine fever in swine stocks.
F
74
Classical swine fever virus causes lympho-histiocytic encephalitis in pigs.
T
75
Classical swine fever virus causes lympho-histiocytic encephalitis in carnivores
F
76
Classical swine fever Virus spreads slowly in the host and causes mainly chronic disease
F **Quick spread- highly contagious !!**
77
Complicated forms of the Classical swine fever are rarely seen
F
78
The Classical swine fever virus may cause reproductive disorders
T absorption, stillbirth, mummification
79
Haemorrhages are the most typical lesions of acute Classical swine fever
T
80
Classical swine fever can unambiguously diagnosed by the clinical signs and pathology
F
81
Domestic swine of most European countries are free from Classical swine fever virus
T
82
The Classical swine fever may appear in a milder form in wild boar than in domestic swin
T
83
Low virulence strains of CSFV may lead to asymptomatic infection
T
84
CSF is spread via infected pigs
T
85
Sows infected by CSF will have immunotolerant piglets.
T
86
Piglets of sows vaccinated against CSF are vaccinated at 6-12 months
F
87
To prevent CSF, we vaccinate pigs older than 6 months of age with live vaccine
F
88
To prevent CSF we use inactivated vaccines made from the Chinese strain
F
89
Shedding may start 2-3 days after first clinical signs
F
90
CSF can be prevented by inactivated vaccines.
F
91
CSF can hardly be distinguished from African swine fever
T
92
CSF always causes abortion in pigs
F
93
Hungary does not have to make any preventative action against CSF
F
94
Incubation of CSF is 8-22 days
T, F?? Incubation 4-7 day : Acute infection Incubation up to 1 month: chronic infection
95
CSF was first written about in USA
T (1833)
96
First symptom of CSF is drooping ear
F brain lymphocytic infiltration +/- fine haemorrhage in the kidney cortex
97
CSF virus has good resistance
T
98
Classical swine fever virus (CSFV) is mainly transmitted by mosquitoes
F live, infected animals raw pork meat, pork products raw pork wastes -slaughter fomites humans wild boar!
99
The presence of CSFV in a herd does not influence reproduction parameters
F
100
CSF is frequently complicated with bacterial infections
T
101
The clinical signs of CSF and ASF are similar
T
102
Central nervous signs are never seen in CSF
F
103
Serological cross reactions my occur between BVD virus and CSFV
F
104
Only inactivated vaccines are available against CSFV.
F
105
It is a disease of domestic swine and wild boars, but several other species are also suceptible
F
106
Only domestic swine and wild boars are susceptible
T
107
Fever, anorexia haemorrhages in the skin and weakness of the hind legs are the most important signs
T
108
For prevention state medical steps and vaccination are used in Europe
F
109
The CSFV typically damages endothelial- and lymphatic tissues
T
110
In Europe vaccination of domestic pigs against Classical swine fever is common
F
111
Classical swine fever is a notifiable disease in Europe
T
112
In Europe vaccination of domestic swine populations against CSF is compulsory
F
113
Classical swine fever virus strains are classified into several serotypes
F
114
In subacute CSF we can observe signs of pneumonia during necropsies
T
115
Boutons in the large intestine are the earliest lesions in CSF
F
116
Classical swine fever infection in the second half of the pregnancy leads to foetal development problems
F First half

Epidemiology - MIDTERM 3 PQS (15 decks)

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