Arteriviridae & Bunyaviridae Flashcards Preview

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Flashcards in Arteriviridae & Bunyaviridae Deck (20)
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1

The Arteriviridae family belongs to the Order:
       Nidovirales
       Mononegavirales
       Caudovirales
       Picornavirales

Nidovirales

2

In which cells do the arteriviruses initially replicate?
       artery cells
       arterioles
       bone marrow cells
       macrophages

macrophages

3

During Equine arteritis virus infection arteries are damaged by virus replication and inflammatory cytokines.
       True 
       False 

True

4

Where in the body does oedema develop during equine arteritis virus infection?
       nasal mucosa
       tail base
       there is no oedema during equine arterivirus infection
       over the eyes and abdomen

  over the eyes and abdomen

5

The best way to prevent transmission of equine arterivirus is:
       kill infected horses
       recognize and separate infected horses
       no effort required, the infection is self-limiting
       prevention is unachievable

recognize and separate infected horses

6

PRRSV frequently causes reproductive failure in:
       sows and gilts
       barrows
       boars
       spayed pigs

       sows and gilts

7

During infection with PRRSV foetuses are killed by hypoxia due to arteritis that develops in the umbilical vessels.
       True 
       False

True

8

Intentional whole-herd infection is an option in the control of PRRSV.
       True 
       False 

True

9

If you decide to prescribe immunohistochemistry as a test for the detection of PRRSV in mummified foetuses, which samples would you provide?
       heparin blood collected from the mummified foetus
       tissue collected from the mummified foetus
       vulva discharges
       swabs of fresh nasal discharge

 tissue collected from the mummified foetus

10

During PRRSV infection, what post-mortem samples would you collect for testing immediately after abortion?
       lung
       lymph nodes and tonsils
       spleen
all options are valid

all options are valid

11

Regarding PRRSV infection, the aim is to stabilize the herd by assuring immunity, particularly in breeding stock. Which of the following approaches would aid in achieving this aim?
       no vaccination for naïve animals
       start the breeding with animals of the same age
       early vaccination of breeding stock
       recognition and elimination of problem animals

early vaccination of breeding stock

12

If a new breeding boar is to be introduced into the herd, how long would you recommend that it be quarantined?
       15 days
       5 weeks
       at least 8-13 weeks
       if the boar looks healthy there is no need to quarantine

       at least 8-13 weeks

13

Orthobunyavirus, Nairovirus, Phlebovirus are examples of arthropod-borne viruses. This means that they are: (Points : 2)
       carnivorous viruses
       omnivorous viruses
       herbivorous viruses
       arboviruses

arboviruses

14

In which cellular compartment are Bunyavirus particles assembled and glycosylated?
       acidic endosomes
       mitochondria
       endoplasmic reticulum and the Golgi network
       nucleus

 endoplasmic reticulum and the Golgi network

15

Which of the following Bunyaviruses can cause arthrogryposis and hydranencephaly?
       Akabane virus and Cache Valley virus
       Puumala and Seoul viruses
       Crimean Congo haemorrhagic and Nairobi Sheep disease viruses
       Sin Nombre virus

Akabane virus and Cache Valley virus

16

Arthrogryposis and hydranencephaly observed during Bunyavirus infection is most common in:
       pigs
       cattle and sheep
       fish
       horses

       cattle and sheep

17

Which animals are highly susceptible to the Akabane virus?
       dogs
       horses
       pigs
       cows and ewes

       cows and ewes

18

Which arthropod transmits the Rift Valley Fever virus?
       the house fly
       the tick
       the fruit fly
       the mosquito

       the mosquito

19

In which geographical region is the Rift Valley Fever virus enzootic?
       United States of America
       Eastern and Southern Africa
       Europe
       South America

Eastern and Southern Africa

20

Outbreaks of the Rift Valley Fever usually occur after:
       a drought
       heavy snow
       abnormally heavy rainfall
       gusty winds

       abnormally heavy rainfall