Arteriviridae & Bunyaviridae Flashcards
The Arteriviridae family belongs to the Order: Nidovirales Mononegavirales Caudovirales Picornavirales
Nidovirales
In which cells do the arteriviruses initially replicate? artery cells arterioles bone marrow cells macrophages
macrophages
During Equine arteritis virus infection arteries are damaged by virus replication and inflammatory cytokines.
True
False
True
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
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
PRRSV frequently causes reproductive failure in: sows and gilts barrows boars spayed pigs
sows and gilts
During infection with PRRSV foetuses are killed by hypoxia due to arteritis that develops in the umbilical vessels.
True
False
True
Intentional whole-herd infection is an option in the control of PRRSV.
True
False
True
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
During PRRSV infection, what post-mortem samples would you collect for testing immediately after abortion?
lung
lymph nodes and tonsils
spleen
all options are validall options are valid
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
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
Orthobunyavirus, Nairovirus, Phlebovirus are examples of arthropod-borne viruses. This means that they are: (Points : 2) carnivorous viruses omnivorous viruses herbivorous viruses arboviruses
arboviruses
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
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
