17d: Cow Infertility & Abortion

Etiologic agent of campylobacteriosis in cows

Campylobacter fetus venerealis

Lay term for campylobacteriosis

Vibrio

Typical presentation of Campylobacter infections

Sporadic, mid term abortions

T/F: we can culture for Campylobacter and Tritrichomonas together

False, you need different culture medium

Target for herd abortion rates

<5%, <10% in dairy

Common causes of abortion (from his highlighted list)

• BVDV

• BHV-1 (IBR)

• Leptospirosis

• Neospora caninum

T/F: we often can find answers for abortion

Haha…ha…

When does BVD cause abortion

First trimester

Abortion presentation that should make you dig for a PI calf

Abortions with lots of congenital defects

Presentation of abortions caused by BHV-1 (IBR)

Late term abortion storm

Presentation of abortions caused by Leptospira interrogans

Sporadic late term abortion

Most significant serovars of Leptospira in cattle

Hardjo and Pomona

Typical clinical presentation of venereal ureaplasma and mycoplasma

Vaginitis, vesicles, and infertility

Typical demographic for chlamydial abortions

Small ruminants

Presentation of abortions caused by Chlamydia

Sporadic late term abortions

Route of exposure for epizootic bovine abortion AKA Foothills abortion

Ornithodorus coriaceus tick

Presentation of abortions caused by Foothills abortion

Late trimester abortion storm in heifers

Role that cattle play in the Neospora caninum life cycle

Intermediate host

Definitive host of Neospora caninum

Dogs and other canids

T/F: high titers are diagnostic for Neospora caninum as cause of abortion

False, but they are associated with an increased risk for abortion

Presentation of abortions caused by Neospora caninum

Endemic pattern of sporadic abortions

CS of calves infected with Neospora caninum

Weak, neuro calves with later testicular development problems

Diagnosis for Neospora caninum abortions

IHC of fetal brain or serology of dam

Control for Neospora caninum abortions

• Cull positive cows and daughters of positive cows

• ± Vax

• Control exposure to dogs

Most common cause of fungal abortion

Aspergillus

Hemoparasite that can cause abortions

Anaplasma marginale

Toxic causes of abortion

• Nitrates

• Ponderosa pine

• Locoweed

• Etc.