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##Specific Virology Questions#### > Bunya-, arena-, orthomyxo-, paramyxo-, pneumo-, rhabdo-, filo-, borna-, retro-, bacteriophage, viroids > Flashcards

Bunya-, arena-, orthomyxo-, paramyxo-, pneumo-, rhabdo-, filo-, borna-, retro-, bacteriophage, viroids Flashcards

(74 cards)

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1
Q

Torovirus genus

A

Berne virus (foal gastroenteritis) -

Breda virus (calf gastroenteritis) -

Chicken, swine gastroenteritis

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2
Q

The rift-valley fever virus may cause abortion in sheep

a. False b. True

A

b. True

also in human and

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3
Q

All of the viruses classified in the Bunyavirales order…

a. Are very sensitive to environmental conditions b. Are arboviruses c. Are zoonotic d. All 3 answers above are false

A

c. Are zoonotic

arboviruses and weak resistence… except hantavirus

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4
Q

Bunyaviruses may be transmitted by arthropod vectors

T

F

A

T

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5
Q

Bunyaviruses

a. Have a double capsid b. Are non-enveloped c. Have binal symmetry d. Have a segmented genome

A

d. Have a segmented genome

+​ssrna, helical, enveloped

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6
Q

Nairoviruses are zoonotic

T

F

A

True

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7
Q

The reservoirs of hantaviruses are rodents

T

F

A

true

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8
Q

Hantaviruses have low resistance in the environment

T

F

A

T

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9
Q

Which statement is false?

a. Bunyaviruses may be transmitted by arthropod vectors b. Togaviruses may be transmitted by arthropod vectors c. Arenaviruses may be transmitted by arthropod vectors d. Flaviviruses may be transmitted by arthropod vectors

A

c. Arenaviruses may be transmitted by arthropod vector

(reservoir hosts- rodents )

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10
Q

The lymphocytic choriomeningitis virus infects

a. Sheep and goat b. Dogs and cats c. Humans d. Water birds

A

c. Humans

from arena-

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11
Q

Arenaviruses

a. Cannot infect humans b. Usually cause gastroenteritis c. Are pleomorphic viruses d. Use reverse transcriptase for their replication

A

c. Are pleomorphic viruses

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12
Q

The arenavirus virion contains ribosomes.

a. False b. True

A

b. True

no function

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13
Q

Arenaviruses have an ambisnese, -ssRNA genome

a. True b. False

A

a. True

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14
Q

New World arenaviruses cause haemorrhages and encephalitis.

T

F

A

T

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15
Q

The genome of orthomyoxoviruses is

a. +ssRNA b. Segmented c. Circular d. Ambisense

A

b. Segmented

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16
Q

The host range of Orthoreoviruses is euryxen

a. True b. False

A

a. true

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17
Q

Which statement is false?

a. The core and matrix proteins of orthomyxoviruses are conservative genes. b. In birds all influenza A serotypes can be detected c. The envelope proteins of orthomyxoviruses are hypervariable genes d. Influenza type C is transmitted by mosquitoes

A

d. Influenza type C is transmitted by mosquitoes

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18
Q

Certain orthomyxoviruses cause infection in fish

a. True b. False

A

a. True

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19
Q

Orthopneumoviruses infect poultry

a. False b. True

A

false

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20
Q

Which statement is true?

a. Metapneumoviruses cause swollen head syndrome in chicken. b. Orthopenumoviruses cause shipping fever in sheep. c. Metapneumoviruses cause interstitial emphysema in turkey. d. Orthopenumoviruses cause kennel cough in dogs.

A

a. Metapneumoviruses cause swollen head syndrome in chicken

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21
Q

Which statement is true?

a. Orthomyxoviruses infect only terrestrial animals. b. The mutation rate of orthomyxoviruses is very low. c. Some orthomyxoviruses are arboviruses. d. Orthomyxoviruses cause myxomatosis in rabbits.

A

c. Some orthomyxoviruses are arboviruses.

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22
Q

The antigenicity of influenza viruses is determined by the HA and NA genes

a. True b. False

A

a. True

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23
Q

Certain orthomyxoviruses cause encephalitis in human

T

F

A

False

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24
Q

Oncogenic viruses can be found in the Orthomyxoviridae family

T

F

A

False

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25
Paramyxoviruses a. are enveloped. b. cause slowly progressing infections. c. cannot be propagated in vitro. d. can use their genome as mRNA.
a. are enveloped
26
Which statement is false? a. Paramyxoviruses cause haemadorption b. Paramyxoviruses cause intracytoplasmic inclusion bodies c. Parmyxoviruses cause syncytium-formation d. Paramyoviruses cause intracellular inclusion bodies
d. Paramyoviruses cause intracellular inclusion bodies
27
Which virus of humans is classified into the paramyxoviridae virus family? a. Rubella virus b. Yellow fever virus c. T-lymphotropic virus d. Mumps virus
d. Mumps virus
28
The genome of paramyxoviruses is a. Ambisense b. -ssRNA c. Circular d. Segmented
b. -ssRNA not segmented like orthomyx-
29
Which statement is true? a. In avulavirinae subfamily we can find only pathogenic viruses b. The Newcastle disease virus causes abortion in sheep c. Paramyxoviruses have good resistance in the environment d. Certain paramyxoviruses cause disease in fish
d. Certain paramyxoviruses cause disease in fish
30
Parainfluenza 3 virus can cause shipping fever in calves and sheep.. shipping fever T F
True
31
Paramyxoviruses a. Can cause myxomatosis in swine b. Do not cause cytopathic effects in cells c. Cause paralysis in swine d. Are sensitive to lipid solvents
d. Are sensitive to lipid solvents
32
Which is true a. The host spectrum of henipaviruses is stenoxen b. The host spectrum of morbilliviruses is stenoxen c. The host spectrum of avulaviruses is stenoxen d. The host spectrum of respiroviruses is stenoxen
b. The host spectrum of morbilliviruses is stenoxen
33
The canine distemper is caused by a morbillivirus.(paramyx-) a. True b. False
a. True
34
Which statement is true? a. The peste des petitis ruminants’ virus causes fever and mucosal erosions b. Rinderpest is present worldwide c. Measles virus causes encephalitis in human d. Distemper virus infects pet cats too
a. The peste des petitis ruminants’ virus causes fever and mucosal erosions
35
Which statement is true? a. The distemper virus can infect large feline species b. The distemper virus persist in the urine bladder and the brain c. Both A and B are true d. Both A and B are false
c. Both A and B are true
36
The rhabdovirus genome is segmented. a. True b. False
b. False
37
Please, mark, which statement is true. a. Certain viruses of the Lyssavirus genus infect fishes b. The infection with rhabdoviruses does not trigger an immune reaction c. Virions of rhabdoviruses of animals are bullet- shaped d. The genome of rhabdoviruses is segmented –ssRNA
c. Virions of rhabdoviruses of animals are bullet- shaped
38
Please, mark, which statement is true! a. The rabies virus is a weak antigen b. The most common source of human rabies cases is the bite from rabid cats c. Certain animal species are orally vaccinated against rabies d. Rabies cause asymptomatic infection in many mammalian hosts
c. Certain animal species are orally vaccinated against rabies
39
It is a member of the Rhabdoviridae family ..Vesicular stomatitis virus? T F
T
40
The rabies virus a. does not cause viraemia. b. is an arbovirus. c. is a weak antigen. d. cause strong CPE in cell culture.
a. does not cause viraemia.
41
Please, mark, which statement is true! a. Novirhaboviruses infect mammals b. The bovine ephemeral fever virus is an arbovirus c. The rabies virus is stenoxen d. The rabies virus causes cell-bound viraemia
b. The bovine ephemeral fever virus is an arbovirus
42
The parrot proventricular dilatation disease virus a. has a segmented genome. b. belongs to the Bunyavirales order. c. belongs to the Bornaviridae family. d. belongs to the Arenaviridae family.
c. belongs to the Bornaviridae family.
43
The bornavirus genome is ambisense. a. True b. False
b. False
44
Please, mark which statement is true! a. Bornaviruses cause encephalitis in horses b. Mammalian bornaviruses are endemic worldwide c. The resevoirs of bornaviruses are different parrot species d. Bornaviruses are only pathogenic in mammals
a. Bornaviruses cause encephalitis in horses
45
Please, mark, which statement is true! a. Bornaviruses have a narrow host range b. Avian bornaviruses are highly resistant in the environment c. The borna disease virus is spread by bats d. Bornaviruses can infect only humans
b. Avian bornaviruses are highly resistant in the environment
46
Filoviruses a. Are weak antigens b. Are mainly present in Africa c. Have rodent reservoir species d. Have extremely good environmental resistance
b. Are mainly present in Africa
47
The virions of filoviruses a. Take ribosomes from the host cells b. Are pleomorphic c. Are bullet shaped d. Have helical symmetry
d. Have helical symmetry
48
Which statement is false? a. Filoviruses cause lethal disease with a rapid course b. The filoviruses are sensitive to environmental conditions c. Filoviruses are transmitted by mosquitoes d. Filoviruses are good antigens
c. Filoviruses are transmitted by mosquitoes .. by bats
49
Most filoviruses are zoonotic a. True b. False
True
50
The Epstein-Barr virus is a retrovirus. a. True b. False
b. False
51
The Rous sarcoma virus is a herpesvirus a. True b. False
b. False in retro-
52
Retroviruses a. Can be detected by HA assay b. Cannot be propagated in vitro c. Are non-enveloped viruses d. Are good antigens
d. Are good antigens
53
Retroviruses a. Have binal capsid symmetry b. Have variable surface antigens c. Are not transmitted vertically d. Always cause tumours
b. Have variable surface antigens
54
Maedi-visna virus can cause a. Abortion in cattle b. Encephalitis in horse c. Enteritis in goat d. Pneumonia in sheep
d. Pneumonia in sheep
55
Retroviruses a. cause cell-associated infections. b. are extremely resistant in the environment. c. infect only mammals. d. are mostly zoonotic
a. cause cell-associated infections.
56
Retrovirus capsid symmetry a. Is polyhedral b. Is conical c. Is rod shaped d. Can be any of the above
d. Can be any of the above
57
Which is true? a. There are frequent point mutations in the genes encoding the surface proteins of retoviruses b. The genome of retroviruses is haploid c. The oncogenic effect of retroviruses is due to inhibition of apoptosis d. All three statements above are true
a. There are frequent point mutations in the genes encoding the surface proteins of retoviruses
58
Retroviruses,Have very strong resistance in the environment T F
F
59
The genome of retroviruses is diploid T F
False
60
Retroviruses induce tumour-formation. T F
T
61
**B**acteriophages a. Have always binal symmetry b. Are antigenic in mammals c. Eat bacteria d. Are always DNA viruses
c. Eat bacteria
62
Which statement is true? a. In lytic infection phage replication happens b. The lysogen infection results in phage resistance in the bacteria c. Phage induction means gene transfer between bacteria d. The temperate phage is a thermosensitive mutant
b. The lysogen infection results in phage resistance in the bacteria
63
Bacteriophages are antigenic in mammals. T F
T
64
Bacteriophages may change the properties of the host cell T F
T
65
Which statement is true? a. Viroids are enveloped particles b. Viroids can cause asymptomatic infections c. Viroids consist of only nucleic acid d. Viroids contain structural proteins
c. Viroids consist of only nucleic acid
66
Viroids spread mechanically a. True b. False
a. True
67
Viroids are pathogenc in cultivated plants T F
T
68
Prions can be detected by a. CF test b. PCR c. HA assay d. ELISA
d. ELISA
69
Infectious prions a. Are strong antigens in the host organisms b. Are very sensitive to the higher temperature c. Are resistant to cellular proteases d. Contain only +ssRNA
c. Are resistant to cellular proteases
70
Prions are resistant to heat treatment a. True b. False
a. True
71
The prions’ genome is dsRNA T F
F pure protein
72
Prions can be found in healthy neurons too T F
True
73
Scrapie a. Is a disease of the tomato plant caused by a viroid b. Is a different term of mad cow syndrome c. Causes itching in sheep d. Is a spongiform encephalopathy of humans
c. Causes itching in sheep
74

##Specific Virology Questions#### (6 decks)

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