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Elife
January 2025
Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Canada.
Several areas of the world suffer a notably high incidence of Shiga toxin-producing . To assess the impact of persistent cross-species transmission systems on the epidemiology of O157:H7 in Alberta, Canada, we sequenced and assembled O157:H7 isolates originating from collocated cattle and human populations, 2007-2015. We constructed a timed phylogeny using BEAST2 using a structured coalescent model.
View Article and Find Full Text PDFPurpose: In vitro, oocyte development is susceptible to oxidative stress, which leads to endoplasmic reticulum (ER) stress. This study investigated whether the antioxidant melatonin attenuates ER stress and maintains oocyte-cumulus cell communication during the in vitro growth (IVG) of bovine oocytes.
Methods: Oocyte-granulosa cell complexes (OGCs) were harvested from slaughterhouse-derived ovaries and grown in vitro for 5 d at 38.
Front Microbiol
January 2025
Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
Bovine viral diarrhea virus (BVDV) is the causative agent of bovine viral diarrhea, which causes significant economic loss to the global livestock industry. Despite the widespread use of inactivated BVDV vaccines, highly pathogenic strains continue to emerge. In China, regional variations in BVDV subtypes, morbidities, and symptoms, however, only the BVDV 1a subtype vaccine is currently approved.
View Article and Find Full Text PDFFront Vet Sci
January 2025
College of Animal Science, Xinjiang Agricultural University, Urumqi, China.
Introduction: This study examines the effects of steam-flaked corn starter on pre-weaned Simmental calves' growth, immunity, and metabolism. Despite benefits shown in adult cattle, research on calves is limited. The goal is to optimize calf feeding for better growth, health, and nutrient use.
View Article and Find Full Text PDFJDS Commun
January 2025
Department of Animal Sciences, Purdue University, West Lafayette, IN 47907.
Periparturient dairy cows experience metabolic adaptations to prepare for increased nutrient requirements of the fetus and the onset of lactation. Adaptations include increased peripheral tissue insulin resistance, which can be evaluated experimentally using intravenous glucose tolerance tests (IVGTT). The objective of this study was to determine if prepartum skeletal muscle reserves and supplementation of branched-chain volatile fatty acids (BCVFA) in the prepartum period affected blood glucose, β-hydroxybutyrate (BHB), and insulin concentrations 2 wk prepartum and 1 wk postpartum utilizing an IVGTT.
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