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Streptococcus ovis associated abortion in an Icelandic mare.
J Equine Vet Sci
December 2024
Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Højbakkegaard Alle 5A, DK-2630 Taastrup, Denmark.
Article Synopsis
- Streptococci are common bacterial causes of abortion in mares, often entering the uterus from the lower genital tract.
- S. ovis, typically linked to sheep diseases, was found in an 8-month-old aborted equine fetus and connected to severe lung and placental infections.
- The infection likely occurred after a veterinarian unintentionally damaged the cervical mucus plug during a swab procedure, allowing the bacteria to access the uterus.
Association of activity and subsequent fertility of dairy cows after spontaneous estrus or timed artificial insemination.
J Dairy Sci
June 2023
Clinic for Animal Reproduction, Faculty of Veterinary Medicine, Freie Universitaet Berlin, Koenigsweg 65, 14163 Berlin, Germany.
The objective of this observational study was to evaluate the association between increased physical activity at first artificial insemination (AI) and subsequent pregnancy per AI (P/AI) in lactating Holstein cows following spontaneous estrus or a timed AI (TAI) protocol. We also wanted to identify factors associated with the intensity of activity increase (PA) captured by automated activity monitors (AAM) and fertility. Two experiments were conducted, in which cows either were inseminated based on the alert of the AAM system (AAM cows) or received TAI following a 7-d Ovsynch protocol (TAI cows) if not inseminated within a farm-specific period after calving.
View Article and Find Full Text PDFThe Role of Housing Conditions on the Success of Artificial Insemination in Intensively Reared Dairy Ewes in Greece.
Animals (Basel)
October 2022
Laboratory of Animal Husbandry, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University, 54124 Thessaloniki, Greece.
The objective was to assess the effect of housing conditions during the summer months on the success rates of cervical artificial insemination (AI) with cooled semen, in intensively reared dairy ewes in Greece. The study involved 2083 Lacaune ewes from 23 flocks that were serviced during May to September. An estrous synchronization protocol with the insertion of progestogen sponges for 14 days and eCG administration at sponge removal, was used.
View Article and Find Full Text PDFFeasibility and accuracy of using different methods to detect pregnancy by conceptus-stimulated genes in dairy cattle.
JDS Commun
May 2021
Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo 00508-900, Brazil.
Development of new methods for early diagnosis of pregnancy can be important to increase the reproductive efficiency and profitability of dairy herds. The bovine conceptus secretes IFN-τ that stimulates the transcription of several genes in circulating immune cells and extrauterine tissues. The aims of this study were to evaluate the mRNA abundance for pregnancy predictability of a classic gene stimulated by IFN-τ () and a novel potential pregnancy marker () in peripheral blood mononuclear cells (PBMC), total blood leukocytes (TBL) or milk leukocytes (TML), and cervical cells (CC) on d 20 after timed artificial insemination (TAI) in dairy cattle.
View Article and Find Full Text PDFFactors associated with estrous expression and subsequent fertility in lactating dairy cows using automated activity monitoring.
J Dairy Sci
May 2021
Clinic of Animal Reproduction, Freie Universitaet Berlin, 14163 Berlin, Germany.
The objective of this observational study was to identify factors associated with estrous duration (DU) and intensity measured as the peak of activity (PA) change and subsequent fertility in lactating Holstein cows using a neck-mounted automated activity monitor (Heatime Pro, SCR Engineers Ltd., Netanya, Israel). Ambient temperature and relative humidity were recorded hourly to calculate the temperature-humidity index (THI).
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