reproduction

Question 1

what does chlamydia abortus cause

Answer 1

enzootic abortion - if caught to late to abort they will abort the next year
intracellular bacteria

Question 2

what does toxoplasma gondii cause in sheep

Answer 2

infection in non-pregnant = immunity
otherwise causes infertility, mummification, stillbirth and abortion
cats are definitive host

Question 3

what does campylobacter (jejune and fetus fetus) cause in sheep

Answer 3

during pregnancy sheep abort 7-25 days later then strong immunity
abortions in last 6 weeks gestation
waives of disease every 4-5 years
grey necrosis on foetal livers

Question 4

Dx of EAE

Answer 4

thickening of placenta between cotyledons (placentitis) and brown exudate

Question 5

Dx of toxoplasma

Answer 5

dark cotyledons with white necrotic speckles with normal intercotyledonary area

Question 6

when can oxytetracycline be used to help with EAE

Answer 6

used to maintain the placenta
after 90 days when placenta starts to deteriorate, before 126

Question 7

what can cause hydracephalus

Answer 7

blue tongue ddx so notify apha

Question 8

how do higher yielding diary cows show oestrus compared to normal cows

Answer 8

shorter oestrus
shorter standing times

Question 9

what do you treat pyometra with

Answer 9

prostaglandin and recheck - not as important as others

Question 10

what does border disease cause

Answer 10

reduced conception rates

Question 11

what is the safest semen sampling method in the bull

Answer 11

electroejaculation

Question 12

possible causes of cows not conceiving

Answer 12

poor oestrus detection/ai
infectious causes
toxins - myco/endotoxins
NEG/ mineral deficiencies
iatrogenic - improper hormone use
semen abnormalities

Question 13

possible causes of anoestrus

Answer 13

failure to recognise oestrus
NEG vitamin/trace element deficiencies
pyometra/endometritis
pregnancy (surprisingly common)
cystic ovarian disease
suckling calf at foot