Search Results
History A 2-year-old pregnant heifer aborted her first calf in the third trimester. She was housed on an outdoor pasture with other bred heifers. Third-trimester abortions had been a chronic problem in this herd for the past 7 years. The farm
Abortions and stillbirths cause severe economic loss to the equine industry. It is estimated that 25% to 45% of breeding mares fail to give birth to a live foal. 1 Approximately one third of these failures reportedly are the result of infectious
spread through nasal secretions, droplets, genital secretions, serum, and fetal fluids. 1 Nonvaccinated pregnant cattle are susceptible to the reproductive effects of BHV-1, and infections can result in abortion rates as high as 25%. These infections
cause of reproductive losses in sheep, with abortion rates that range from 5% to 50% in infected flocks. 2–4 Historically, Campylobacter -induced abortions in sheep were primarily associated with Campylobacter fetus ssp fetus and to a lesser extent
From late December 2004 until early February 2005, a Wyoming goat herd with approximately 135 bred does and 3 bucks, consisting primarily of a variety of crossbred meat-type goats, experienced an abortion storm in which 44 does aborted, resulting
in the 2014 breeding season. At that time, the 7 presumed pregnant mares that had been kept in the herd were found to have aborted. Because the abortions were not observed and no aborted fetuses were found for examination, it was suspected that this
generated during an abortion outbreak in mares in Kentucky during the spring of 2001. 8 The abortion outbreak resulted in financial losses estimated at over 300 million dollars. 9 The objective of the study reported here was to assess whether this
primary cause of clinical illness in animals. Sick animals often present with nonspecific clinical signs that might be explained by various etiologies, including infectious and noninfectious diseases. For instance, livestock abortions occur from ingestion
Abstract
Objective—To characterize the temporality of dates of breeding and abortion classified as mare reproductive loss syndrome (MRLS) among mares with abortions during early gestation.
Animals—2,314 mares confirmed pregnant at approximately 28 days after breeding from 36 farms in central Kentucky, including 515 mares that had earlyterm abortions.
Procedure—Farm veterinarians and managers were interviewed to obtain data for each mare that was known to be pregnant to determine pregnancy status, breeding date, last date known to be pregnant, and date of abortion.
Results—Mares bred prior to April 1, 2001, appeared to be at greatest risk of early-term abortion, both among and within individual farms. Mares bred in mid-February appeared to be at greatest risk of abortion, with an estimated weekly incidence rate of abortion of 66% (95% CI, 52% to 80%).
Conclusions and Clinical Relevance—Mares in central Kentucky bred between mid-February and early March were observed to be at greatest risk of early-term abortion, and risk gradually decreased to a background incidence of abortion of approximately 11%. Mares bred after April 1, 2001, appeared to be at markedly less risk, indicating that exposure to the cause of MRLS likely occurred prior to this date. (Am J Vet Res 2005;66:1792–1797)
Bovine viral diarrhea virus and BHV1 are pathogens of the reproductive tract that affect cattle throughout the world. These viruses can cause economic loss because of infertility, abortions, and the birth of calves with poor health. 1
