Flashcards in Abortion in Horses Deck (20)
What is placentitis in horses commonly caused by?
Strep spp and E. coli
What is the most commonly incriminated viral cause of abortion in horses?
When during gestation will EHV-1 cause abortion?
When should an EHV-1 vaccine be administered to prevent abortion?
5, 7, 9 months of gestation
What is the most common non-infectious cause of abortion in horses?
Major cause of abortion in mares during the latter stages of pregnancy
What is the most common route in which bacteria are introduced to the uterus?
What pathophysiological aspect of placentitis causes abortion?
Detachment of placenta @ cervical star region, inflammation
How do you treat placentitis in a mare?
Abx, NSAIDs, progesterone, clenbuterol
What is the outcome of placentitis?
Variable - abortion to healthy foal to septic foal
What herpes virus of horses causes equine viral arteritis?
What induces abortion in an EHV-1 infection?
Rapid placental detachment
How might a fetus become infected with EHV-1?
Chorionic vasculature or inhaling infected amniotic fluid
How will an aborted EHV-1 fetus present at necropsy?
Small necrotic liver foci, necrotizing broncholitis, intranuclear inclusion bodies
What clinical signs in a newborn foal indicate it might be infected with EHV-1?
Respiratory distress, icterus, fever, lethargy
What type of placenta does a mare have?
Why is it unlikely for twinning to carry to term in a mare?
Limited endometrial surface space for allantochorion attachment
If twin fetuses are carried to term, how are they affected?
Stunted in growth and size from intrauterine growth retardation
What is a relatively uncommon cause of abortion in mares and results from a rotating fetus?