U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Livestock Issues Research: Lubbock, TX
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    NewsletterSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Plains Area Lubbock, Texas Cropping Systems Research Laboratory Livestock Issues Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            FALKENBERG, SHOLLIE - Mississippi State Universityitem
                                            Carroll, Jeffery

                                                         - *Jeff Carroll*item
                                            BALLOU, MICHAEL - Texas Tech Universityitem
                                            SARTIN, JAMES - Auburn Universityitem
                                            BUNTYN, JOSEPH - Mississippi State Universityitem
                                            Elsasser, Theodoreitem
                                            Kahl, Stanislawitem
                                            SCHMIDT, TY - Mississippi State University
  Submitted to: Journal of Animal Science
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 2/25/2011
                                    Publication  Date: 8/11/2011
                                    Citation: Falkenberg, S.M., Carroll, J.A., Ballou, M.A., Sartin, J.L., Buntyn, J.O., Elsasser, T.H., Kahl, S., Schmidt, T.B. 2011. Alterations in the somatotrophic axis during a dual stress and M. haemolytica challenge in beef steers [abstract]. Journal of Animal Science. 89:A-399(E-Suppl. 1).Interpretive Summary:
                                Technical Abstract: The objective of this trial was to characterize the potential impact of individual and multiple stressors prior to, simultaneously, and post M. haemolytica challenge on the somatotrophic axis. Forty-eight vaccinated beef steers (207.7 ± 22.1 kg BW) were randomly assigned to 1 of 8 treatments (trt). Treatments consisted of steers that received M. haemolytica (Mhae; given at 0 h for all 8 trts) and corticotrophin releasing hormone (CRH) + arginine vasopressin (AVP) in tandem as the stressor (Stress) administered prior to, simultaneously, or after the Mhae challenge. The 8 trt were: 1) Mhae only; 2) Stress at -7 h + Mhae; 3) Stress at 0 h + Mhae; 4) Mhae followed by Stress at 7 h; 5) Stress at -7 h and 0 h + Mhae; 6) Stress at -7 h and 7 h + Mhae; 7) Stress at 0 h and 7 h + Mhae; and 8) Stress at -7 h, 0 h and 7 h + Mhae. Steers were fitted with jugular catheters and rectal temperature (RT) probes on d -3, moved to stanchions, given a day to acclimate (d -2), baseline samples obtained on d -1, and the challenge was given on d 0. There were trt x time interactions or trt effects (p<0.05) observed for cortisol (CORT), growth hormone (GH), insulin-like growth factor-I (IGF-I), and RT. Differences were observed (p>0.05) in overall GH and IGF-I as well as concentrations prior to the Mhae challenge for trts that received multiple Stress challenges or Stress during and after the Mhae challenge. No differences were observed (p>0.05) for change in GH and IGF-I concentrations after the Mhae challenge.  Furthermore, no differences were observed (p>0.05) in GH and IGF-I for trts that did not receive any Stress or Stress trt prior to the Mhae challenge. The results indicate the Mhae challenge altered GH and IGF-I in vaccinated calves regardless of the timing associated with the applied stress. However, the data also suggest that stressors can impact overall GH and IGF-I concentrations when stressors occur during and after the Mhae challenge.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov