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Full-Text Articles in Dairy Science
Staphylococcal Surface Proteins As Vaccine Candidates For The Control Of Staphylococcal Mastitis In Dairy Cows, Jessica Jean Vidlund
Staphylococcal Surface Proteins As Vaccine Candidates For The Control Of Staphylococcal Mastitis In Dairy Cows, Jessica Jean Vidlund
Masters Theses
Bovine mastitis, an inflammation of the mammary gland, is the single most costly disease of dairy cattle. Staphylococci, a major bacteria that cause bovine mastitis, are commonly divided into two major groups: Staphylococcus aureus and non-aureus staphylococci (NAS), previously known as coagulase-negative Staphylococcus species (CNS). Current mastitis control programs are not fully effective against staphylococcal mastitis and antibiotics are not sustainable due to limited success and the emergence of antimicrobial resistant bacteria. Non-antibiotic sustainable control tools, such as effective vaccines, are critically needed. Our lab developed and evaluated Staphylococcus aureus surface associated protein (SASP) and Staphylococcus chromogenes surface associated protein …
Transition Cow Metabolites And Physical Traits Influence Days To First Postpartum Ovulation In Dairy Cows, S. Banuelos, J. S. Stevenson
Transition Cow Metabolites And Physical Traits Influence Days To First Postpartum Ovulation In Dairy Cows, S. Banuelos, J. S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to assess key metabolites and patterns of prepartum and postpartum physical activity as they relate to the onset of first postpartum ovulation in lactating dairy cows. Close-up dry Holstein cows (n = 82) and late gestation heifers (n = 78) were enrolled beginning 3 weeks before expected calving date (day 0). Cows were fit with Cow SensOor ear tags to assess transitional changes in eating, resting, rumination, activity, and ear-surface temperatures. Rectal temperatures were assessed and blood samples were collected on days 0, 3, 7, and 14 to measure concentrations of glucose, free fatty …