Bovine respiratory disease (BRD) is among the most challenging infectious disease facing the entire cattle industry due to the economic consequences associated with BRD. The objectives of this study were threefold: (1) to investigate the effects of BRD incidence and number of treatments on economically important performance and carcass traits. (2) to examine the effects lung lesion scores have on important production traits (3) to evaluate the genetic components associated with BRD in both pre-wean and feedlot cattle. The healthfulness of animals is more important than ever before because of the increasing resistance to current medical treatments and prevention procedures, cost to the industry, and consumer acceptances in terms of food safety. Reducing BRD incidence would be beneficial in lowering production costs in terms of lower disease incidence and in regard to increasing performance and carcass quality from a genetic merit perspective.
|Advisor:||Reecy, James M.|
|Commitee:||Fernando, Rohan L., Thompson, James R.|
|School:||Iowa State University|
|School Location:||United States -- Iowa|
|Source:||MAI 46/04M, Masters Abstracts International|
|Keywords:||Bovine respiratory disease, Cattle, Disease resistance, Genetics|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be