Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Lemley, Caleb
Committee Member
Larson, Jamie
Committee Member
Stone, Amanda
Committee Member
Paz, Henry
Date of Degree
8-7-2020
Document Type
Graduate Thesis - Open Access
Major
Animal and Dairy Science
Degree Name
Master of Science
College
College of Agriculture and Life Sciences
Department
Department of Animal and Dairy Sciences
Abstract
Most research evaluating the effects of the reproductive tract microbiota on reproductive performance has been done in humans, thus far. In bovids, reproductive microbiota research is not as advanced, with preliminary conclusions, not supported by contamination checks or repeatability. Our studies concluded that endogenous reproductive hormones, days of gestation, and pregnancy status does not change the overall vaginal microbiota composition. Although, the overall composition did not change there were species level differences. These differences could have implications in reproductive performance and fertility in heifers. Heifers that undergo nutrient restriction have similar vaginal microbiota to adequately fed heifers with no species differences. The most impactful finding is that exogenous supplementation of melatonin was associated with changes in the vaginal microbiota in Brangus heifers during late gestation. The implications of this finding are not yet clear, but to date, this is the first hormone, in bovids, determined to change the composition of the vaginal microbiota.
URI
https://hdl.handle.net/11668/18062
Recommended Citation
Messman, Riley, "Exploring the vaginal microbiome in relation to pregnancy status and reproductive performance in Brangus heifers" (2020). Theses and Dissertations. 2184.
https://scholarsjunction.msstate.edu/td/2184