cow abortions

Question 1

how long is the pregnancy maintained by the CL in cows

Answer 1

200 days

Question 2

why will a fetus appear autolyzed

Answer 2

fetal death first with later expulsion

Question 3

autolyzed fetus. what are your differentials

Answer 3

listeriosis, boHV-1, lepto, trueperella

Question 4

majority pregnancy loss at 30-70 days. but can cause infertility

Answer 4

campylobacteriosis (fetus venerealis)

Question 5

sporadic late term abortion in a cow comingling with sheep

Answer 5

c. fetus fetus or jejuni

Question 6

fetal death with retained fetal membranes. necrosis of the amnion, can also produce neonatal pneumonia or weak calves

Answer 6

mollicute infection- mycoplasma

Question 7

BVD does what to the fetus

Answer 7

a transplacental infection through the umbilical vein

Question 8

what is the time frame for a PI BVD

Answer 8

40-125 days

Question 9

time frame for a congenital malformation BVD

Answer 9

100-150days

Question 10

how is bluetongue transmitted

Answer 10

biting midge, not contagious (culicoides)

Question 11

weak calves, hydrancephaly, abortion from blue tongue occurs when

Answer 11

70-130d gestation

Question 12

abortions from BHV are most common when

Answer 12

4-8months

Question 13

exogenous transplacental infection of neospora

Answer 13

niave animal ingests while pregnant and passes to fetus

Question 14

endogenous transplacental infection of neospora

Answer 14

calf born with latent infection reactivates tachys during pregnancy and passes it to their fetus

Question 15

when is neospora abortions mostly occur. why

Answer 15

early second trimester (5-6mo), reactivated in stress/immunosuppression

Question 16

what will we see from neospora infection

Answer 16

damages fetal placental villi– hypoxia and boots the fetus out

Question 17

which lepto serovar causes more infertility.

Answer 17

pomona, 1-6weeks post infection

Question 18

what would a lepto infection look like in the fetus

Answer 18

autolyzed and icteric, may deliver a weak infected calf

Question 19

moroccan leather dry thickened cracked intercotyledonary placenta

Answer 19

brucellosis

Question 20

most common route of exposure for mycotic abortions

Answer 20

respiratory and GIT

Question 21

what should you know about the foothill abortion

Answer 21

ornithodoros coriaceus, slow infection over months, most abortions are in 3rd trimester. lifelong immunity

Question 22

petechial hemorrage and enlarged ln and liver of fetus

Answer 22

foothill abortion

Question 23

what bacterins can we vax for

Answer 23

campy and lepto

Question 24

what vaccines do we give to pregnant animals

Answer 24

10-way 5 way and vibrio and lepto

Question 25

which cause embryonic loss

Answer 25

trich and campy

Question 26

which can cause losses anytime

Answer 26

ureaplasma/mycoplasma, BVD, bluetongue, listeriosis