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ARS Home » Plains Area » Lubbock, Texas » Cropping Systems Research Laboratory » Livestock Issues Research » Research » Publications at this Location » Publication #381293
Research Project: Nutritional Intervention and Management Strategies to Reduce Stress and Improve Health and Well-being in Cattle and Swine

Location: Livestock Issues Research

Title: Evaluation of Bacillus subtilis PB6 probiotic (Clostat®500) on feedlot phase growth performance, efficiency of dietary net energy utilization, and fecal and subiliac lymph node salmonella prevalence in spring placement yearli

Author
item SMITH, ZACHARY - South Dakota State University
item Broadway, Paul
item RUSCHE, W - South Dakota State University
item WALKER, J - South Dakota State University
item HERGENREDER, JERILYN - Kemin Industries, Inc

Submitted to: Meeting Abstract
Publication Type: Proceedings
Publication Acceptance Date: 2/25/2021
Publication Date: 3/1/2021
Citation: Smith, Z.K., Broadway, P.R., Rusche, W.C., Walker, J.A., Hergenreder, J.E. 2021. Evaluation of Bacillus subtilis PB6 probiotic (Clostat®500) on feedlot phase growth performance, efficiency of dietary net energy utilization, and fecal and subiliac lymph node salmonella prevalence in spring placement yearling beef steers fed in southeastern South Dakota. South Dakota State University Beef Day 2021. 30-41.

Interpretive Summary: Beef producers are currently using probiotic supplements in beef cattle feed as an antibiotic alternative with the potential to improve food safety, reduce antibiotic usage, and improve the overall health and well-being of cattle. A group of scientists from the Livestock Issues Research Unit in Lubbock, TX in conjunction with scientists from South Dakota State and Kemin Industries fed a probiotic to feedlot cattle to determine if the product could improve growth and decrease Salmonella in the cattle. Results from this study showed no differences in the growth rate of cattle fed the probiotic. Very little Salmonella was isolated from the cattle over the feeding period. Also, no Salmonella was recovered at harvest. These results are important for producers, animal health professionals, and consumers as they make management decisions in the northern plains of the U.S.

Technical Abstract: The objective of this research was to determine the influence of Bacillus subtilis PB6 administration had on growth performance, carcass traits, and Salmonella prevalence in yearling steers placed on feed in March in southeastern South Dakota that were not subjected to marketing or environmental stressors during the finishing phase. Yearling crossbred beef steers (N = 238; initial shrunk BW = 886 ± 68.8 lbs) were used in a 140-d finishing study at the Southeast Research Farm (SERF) in Beresford, SD. Steers were allotted to one of 24 pens (N = 9 to 10 steers/pen) and assigned to one of two dietary treatments (12 pens/treatment): no probiotic (CON) or 0.5 g·steer-1·d-1 of a Bacillus subtilis PB6 probiotic (CLOSTAT®500, Kemin Industries, Des Moines, IA; CLO). Data were analyzed as a randomized complete block design and pen served as the experimental unit; an a of 0.05 determined significance. Live-basis final BW and ADG tended (P = 0.06) to be greater for CON. Upon harvest, no Salmonella was recovered in any subiliac lymph nodes. Carcass traits were not altered (P = 0.08) by dietary treatment. Salmonella was not observed in the subiliac lymph nodes of any steers upon harvest.