cow abortions Flashcards
how long is the pregnancy maintained by the CL in cows
200 days
why will a fetus appear autolyzed
fetal death first with later expulsion
autolyzed fetus. what are your differentials
listeriosis, boHV-1, lepto, trueperella
majority pregnancy loss at 30-70 days. but can cause infertility
campylobacteriosis (fetus venerealis)
sporadic late term abortion in a cow comingling with sheep
c. fetus fetus or jejuni
fetal death with retained fetal membranes. necrosis of the amnion, can also produce neonatal pneumonia or weak calves
mollicute infection- mycoplasma
BVD does what to the fetus
a transplacental infection through the umbilical vein
what is the time frame for a PI BVD
40-125 days
time frame for a congenital malformation BVD
100-150days
how is bluetongue transmitted
biting midge, not contagious (culicoides)
weak calves, hydrancephaly, abortion from blue tongue occurs when
70-130d gestation
abortions from BHV are most common when
4-8months
exogenous transplacental infection of neospora
niave animal ingests while pregnant and passes to fetus
endogenous transplacental infection of neospora
calf born with latent infection reactivates tachys during pregnancy and passes it to their fetus
when is neospora abortions mostly occur. why
early second trimester (5-6mo), reactivated in stress/immunosuppression
what will we see from neospora infection
damages fetal placental villi– hypoxia and boots the fetus out
which lepto serovar causes more infertility.
pomona, 1-6weeks post infection
what would a lepto infection look like in the fetus
autolyzed and icteric, may deliver a weak infected calf
moroccan leather dry thickened cracked intercotyledonary placenta
brucellosis
most common route of exposure for mycotic abortions
respiratory and GIT
what should you know about the foothill abortion
ornithodoros coriaceus, slow infection over months, most abortions are in 3rd trimester. lifelong immunity
petechial hemorrage and enlarged ln and liver of fetus
foothill abortion
what bacterins can we vax for
campy and lepto
what vaccines do we give to pregnant animals
10-way 5 way and vibrio and lepto
which cause embryonic loss
trich and campy
which can cause losses anytime
ureaplasma/mycoplasma, BVD, bluetongue, listeriosis