Abortion Causes

Infectious- Bacterial

Brucellosis

Vibrosis

Leptospirosis

Listeriosis

Infectious- Viruses

IBR- infectious bovine rhinotracheitis

BVD- bovine viral diarrhea

Blue tonge virus

Pseudorabies

Infectious- Protozoa infections

Trichomoniasis

Cryptosporidia

Toxoplasma

Neospora

Endocrine

Estrogen administration to feedlot heifers d/t progesterone deficiency

Tx: remove CL manually or PG

Glucocorticoid therapy ( vet prescribed for pregnant cows)

Toxic

Nitrates

Cyanogenic plants ie. choke cherry, locoweed, astragalus, ponderosa pine needles

Insecticides

Partially organophosphates

Mycotic

Ergot infected grains

Endophyte infected fescue grass, moldy feed with Aspergillus, moldy sweet cover

Miscellaneous

Traumatic exertional stress

Inflammation

Diagnosising Abortion

Clinical sign in dam and necropsy of aborted fetus

• Blood sample with RTT/LTT

• placenta

• Fetal eyeball and tissues

Prevent Abortions

•adequate VX programs

•nutrition control

•clean and sanitary