1 Data on file. Study Report No. 3131R-60-08-571, Zoetis Inc.

2 Data on file. Study Report No. 3131R-60-08-570, Zoetis Inc.

3 Data on file. Study Report No. 3131R-60-08-569, Zoetis Inc.

4 Hicks B. Impact of morbidity on performance and profitability of feedlot cattle. Beef Cattle Research Update. Oklahoma State University. Panhandle Research and Extension Center. May 2006:1-2.

5 McNeill JW. Value added calves. Extension Animal Science, Texas A&M University. December 1999:1-3.

6 Schneider MJ, Tait RG, Busby WD, Reecy JM. An evaluation of bovine respiratory disease complex in feedlot cattle: Impact on performance and carcass traits using treatment records and lung lesion scores. J Anim Sci 2009;87(5):1821-1827.

7 Jones C, Chowdhury S. Bovine herpesvirus type 1 (BHV-1) is an important cofactor in the bovine respiratory disease complex. Vet Clin Food Anim 2010;26(2):303-321.

8 Babiuk LA, Lawman MJP, Bielefeldt Ohmann H. Viral-Bacterial Synergistic Interaction in Respiratory Disease. Ad Virus Res 1988;35:219-249.

9 Ellis JA. Bovine parainfluenza-3 Virus. Vet Clin Food Anim. 2010;26(3):575-593.

10 Ridpath J. The contribution of infections with bovine viral diarrhea viruses to bovine respiratory disease. Vet Clin Food Anim 2010;26(2):335-348.

11 Hughes H. The Economic Value Of A Preg-Checked Heifer. Beef Magazine February 2012.

12 Wikse SE, Rogers GM, Ramachadran S. Prevalence and risk factors of Leptospira infection in beef cow/calf operations in the United States: Leptospira borgpetersenii serovar hardjo. Bovine Practitioner 2007;41(1):15-23.

13 Grooms DL, Bolin SR, Brock KV, et al. Effect of constant exposure to cattle persistently infected with bovine viral diarrhea virus on morbidity, mortality, and performance in feedlot cattle: summary of three studies. (in press)

14 Loneragan GH, Thomson DU, Montgomery DL, et al. Prevalence, outcome, and health consequences associated with persistent infection with bovine viral diarrhea virus in feedlot cattle. J Am Vet Med Assoc 2005;226(4):595–601.

 15 Grooms DL, Brock KV, Norby B. Performance of feedlot cattle exposed to animals persistently infected with bovine viral diarrhea virus, in Proceedings. 83rd Annual Meeting of the Conference of Research Workers in Animal Diseases 2002;186.

16 Hessman BE, Fulton RW, Sjeklocha DB, et al. Evaluation of the economic effects and the health and performance of the general cattle population after exposure to cattle persistently infected with bovine viral diarrhea virus in a starter feedlot. Am J Vet Res 2009;70(1):73–85.

17 Ellis WA, Thiermann AB. Isolation of leptospires from the genital tract of Iowa cows. Am J Vet Res 1986;47(8):1694-1696.

18 Ellis WA. Leptospirosis as a cause of reproductive failure. Vet Clin North Am Food Amin Pract 1994;10(3):463-478.

19 Woolums AR, Siger L, Johnson S, Gallo G, Conlon J. Rapid onset of protection following vaccination of calves with multivalent vaccines containing modified-live or modified-live and killed BHV-1 is associated with virus-specific interferon gamma protection. Vaccine 2003;21(11-12):1158-1164.

20 Ficken MD, Ellsworth MA, Tucker CM. Evaluation of the Efficacy of a Modified-Live Combination Vaccine against Abortion Caused by Virulent Bovine Herpesvirus Type 1 in a One-Year Duration-of-Immunity Study. Vet Ther 2006;7(3):275-282.

21 Rodning SP, Marley MS, Zhang Y. Comparison of three commercial vaccines for preventing persistent infection with bovine viral diarrhea virus. Theriogenology 2010;73(8):1154-1163.

22 Cortese VS. Clinical and Immunologic Responses of Cattle to Vaccinal and Natural Bovine Viral Diarrhea Virus (BVDV), Western College of Veterinary Medicine, University of Saskatchewan. Available at:http://library.usask.ca/theses/available/etd-10212004-001245/unrestricted/NQ37879.pdf. Accessed August 7, 2012.