What can cause a cow to abort?
Abortions Causes by Infectious Bovine Rhinotracheitis (IBR). Infectious Bovine Rhinotracheitis (common names:IBR, red nose) is caused by a herpes virus. IBR most commonly causes an infection of the respiratory tract. In non-immune, pregnant cows, IBR can cause abortion.
How long does it take a cow to abort?
Abortion is the production of a dead calf within 270 days of insemination. Up to about 120 days most abortions go undetected. Most herds have an abortion rate of < 2% per year.
Will dexamethasone abort a calf?
Results indicate that a combination of prostaglandin F2α analogue and dexamethasone will induce abortion at all stages of pregnancy in feedlot heifers.
What is bovine abortion?
Foothill abortion (epizootic bovine abortion) is a tick-transmitted bacterial disease of pregnant cattle that graze in the foothill or mountainous regions of California, Northern Nevada and Southern Oregon.
How much Lutalyse does it take to abort a cow?
For Intramuscular use for abortion of Feedlot and Other Non-Lactating Cattle. LUTALYSE is indicated for its abortifacient effect in feedlot and other non-lactating cattle during the first 100 days of gestation. Inject a dose of 25 mg intramuscularly. Cattle that abort will abort within 35 days of injection.
What causes foothill abortion in cattle?
Foothill abortion, also called Epizootic Bovine Abortion (EBA), affects cattle in California, Nevada and Oregon. It is caused by a bacterium that is vectored by the Pajaroella tick. These ticks occur in areas with sage, bitter brush, pinyon pines, junipers, and oaks.
When does a calf fetus grow hair?
The hairs of the first-formed follicles emerge at about the 200th day, and 20 days later most of the follicles have emerging hairs. In one foetus (251 days) and two of the new-born calves there are a few second-cycle follicles with emerging hairs.
What causes abortion in dairy cows?
A protozoan parasite known as Neospora caninum has only recently become recognised as an important cause of foetal death, mummification and abortion in cattle, particularly in coastal New South Wales. Antibodies to this parasite appear to be widespread in dairy herds.
Can dexamethasone terminate pregnancy?
The results suggest that oral treatment with dexamethasone can be used to terminate pregnancy in bitches, but that in some cases the withdrawal of treatment after 8 days can result in retention of live pups and require a further treatment or the use of another abortifacient.
Can dexamethasone cause a miscarriage?
But, again, there’s no scientific evidence that dexamethasone prevents miscarriage, and no evidence that this drug–a drug known from animal and human studies to have the potential to change fetal development–is safe to use in this way.
Why does dexamethasone cause abortion?
The low progesterone concentration could be the possible cause of abortion in dexamethasone treated sheep in this study. Progesterone inhibits prostaglandin synthesis and activity in pregnant subjects  and consequently decreases myometrial contractility.
Which disease can cause abortion in cattle?
Infectious bovine rhinotracheitis (IBR) is a major cause of viral abortion worldwide, with abortion rates of 5%–60% in nonvaccinated herds. The virus is widespread, causes latent infections, and can recrudesce; therefore, any cow with a positive IBR titer is a possible carrier.
What kind of infections can cause a miscarriage?
Toxoplasmosis, a protozoal infection, may cause a miscarriage, death of the fetus, and serious birth defects. Listeriosis, a bacterial infection, increases the risk of preterm labor, miscarriage, and stillbirth.
What is the difference between stillbirth and abortion?
The U.S. medical community most often defines miscarriage (also called spontaneous abortion) as the spontaneous loss of a nonviable, intrauterine pregnancy before 20 weeks gestational age (GA), while stillbirth (also called fetal death and intrauterine fetal demise) describes this event at ≥ 20 weeks GA.