Arterivirus

Question 1

Arterivirus
enveloped or non-enveloped
RNA or DNA
pathogens of _____

Answer 1

enveloped
+ssRNA
swine, horses, primates, rodents

Question 2

Equine Arteritis Virus
host:
reservoir:
transmission:
pathogenesis:
clinical signs:

Answer 2

host: horses, donkeys, mules, zebras
reservoir: stallions
transmission: resp secretions, urine, blood, aborted fetal tissues, sexual transmission, in-utero, fomites
pathogenesis: tropism for macrophages, monocytes, and lymphocytes leads to vasculitis, edema, hemorrhage
clinical signs: dependent edema in hind limbs, scrotum, mammary glands, prepuce, ventrum & periorbital/ supraorbital edema
- mares - abortions or congenital defects
- males - carries, asymptomatic

Question 3

when do mares typically have abortions if infected wit equine arteritis virus

Answer 3

10-30 days post infection and can happen anytime during pregnancy
infection in late gestation will result n congenital defects

Question 4

equine arteritis virus
diagnostics:
control:

Answer 4

diagnostics: PCR, VI, ELISA, VN
control: vx, test stallions, biosecurity, quaratine, restricted movement

Question 5

Porcine Reproductive and Respiratory Syndrome Virus
host:
transmission:
pathogenesis:
clinical signs:

Answer 5

host: domestic swine
transmission: body fluids, in-utero, aerosols, fomites
pathogenesis: macrophages & DC, esp. lungs = enzootic pneumonia
clinical signs:
“blue ear disease” - cyanosis
repro failure in gilts/sows
resp dz in young pigs

Question 6

most costly disease of swine

Answer 6

Porcine Repro & Resp Syndrome Virus

Question 7

Porcine Repro & Resp Syndrome Virus
immunity:
diagnostics:
control:

Answer 7

immunity: Ab 1 mo post-infection and are non-neutralizing
diagnostics: PCR (primarily) and ELISA
control: biosecurity, sanitation, vx