Main content

Assessment of a Test for Pregnancy-Associated Glycoproteins in Milk from Dairy Cows

Show full item record

Title: Assessment of a Test for Pregnancy-Associated Glycoproteins in Milk from Dairy Cows
Author: Wynands, Erin
Department: Department of Population Medicine
Program: Population Medicine
Advisor: Kelton, David
Abstract: The first objective of this thesis was to evaluate the effect of storage temperature and duration on milk pregnancy-associated glycoprotein (PAG) ELISA results. PAG level was influenced by storage duration and condition. The change in PAG level was small and the misclassification of samples was minimal. The second objective was to describe the relationship between PAG at various stages of gestation and the likelihood of successful calving. Logistic regression models were constructed for the prediction of successful calving. In cows that tested pregnant > 25 and ≤ 45 days in gestation (DIG), there was a positive curvilinear relationship between PAG level and odds of calving. In cows > 45 and ≤ 75 DIG at the time of testing, PAG level was negatively associated with the odds of calving, and for cows tested > 75 and ≤ 290 DIG PAG level was positively associated with odds of calving.
URI: http://hdl.handle.net/10214/9408
Date: 2015


Files in this item

Files Size Format View
Wynands_Erin_201512_MSc.pdf 818.9Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record