virology 1 Flashcards
pathogenesis of viral disease
- direct invasion of the placenta
- invasion of the placenta to the fetus
- disease in the dam that directly affects fetus
viral dz’s in cattle
bovine herpes
bvdv
schamallenberg
bovine herpes 1 is spread by __ contact and abortion is most common @__ months of gestation with a __% abortion rate
nose to nose, 4 months, 5-60%
hallmark lesion of bovine herpes 1
multifocal hepatic necrosis in the fetus with intranuclear inclusions
BVDV has __ transmission with two strains: cytopathic strain have __ of an effect than noncytopathic
oronasal, less
BVDV has a __ rate of abortion and __ pregnancy rate with multiple outcomes including __, __, __, __, __.
low, low, cerebellar hypoplasia, absorption, mummy, PI animals (25-150d), antibodies
schmallenberg virus is spread by __
culicoides spp
schmallenberg in the summer is characterized by __ while dec-january is characterized by __
diarrhea, fever, decreased milk
still births, congenital abnormalities
horses with herpes __ look sick and will abort while horses with EVA __ look sick and abort
won’t, will
Equine herpes virus is spread by __ contact and is infectious in __ stages of gestation with abortion the most common in the __ trimester
nose to nose, all, 3rd
equine herpes virus has __ hepatic necrosis in the __ with __ inclusions
multifocal, fetus, intranuclear
EHV-1 has __ while EHV-4 has __
stillbirths, sporadic abortions
what is the hallmark of equine viral arteritis?
EDEMA!!!
mares limbs and mammary tissue
stallions sheath and scrotum
EVA is spread by __ contact, __ or semen causing __
direct, transplacental, vasculitis
on necropsy what would you see in a foal with EVA?
arteritis in the fetal heart or placenta
border dz is like __ and is __ transmitted with abortion at __ stage resulting in __ and __
bvdv, venereally, any, cerebellar hypoplasia, hair instead of wool
hairy shakers dz
bluetongue virus is spread by __ effecting what species?
culicoides, sheep, cattle, goats, wild ruminants, deer!
bluetongue virus effects the __ cells resulting in __ and __
vascular endothelial, hemorrhage and edema
what 2 viral diseases are spread by culicoides?
schmallenberg (cattle)
bluetongue (mostly small ruminants)
t/f: its ok to give a pregnant animal the modified live vaccine for bluetongue virus
F
a sheep presents with the following CS. what do you suspect?
fever
depression
cyanosis of tongue
blood vessel congestion on lips +muzzle
edema
abortion less common
inflammation of coronary band
cache valley virus <32 days infx
early embryonic death
cache virus infx 32-37 days
ms or cerebellar malformation
cache virus 37-48d
musculoskeletal
