Yeast cell wall supplementation alters the performance and health of beef heifers during the receiving period

T. R. Young, F. R.B. Ribeiro, N. C.Burdick Sanchez, J. A. Carroll, M. A. Jennings, J. T. Cribbs, R. J. Rathmann, J. R. Corley, B. J. Johnson

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5 Scopus citations

Abstract

A study was designed to determine the effect of feeding yeast cell wall (YCW) on performance of newly received crossbred heifers (n = 140; 225 ± 9.4 kg). Heifers were sorted by source (n = 2) and arranged in a completely randomized block design (35 pens; 7 pens per treatment; 4 heifers per pen). Heifers were separated into treatments [control (CON), YCW A (2.5 g/d per head), YCW AA (5.0 g/d per head), YCW B (2.5 g/d per head), or YCW C (2.5 g/d per head)] and fed for 56 d. Daily DMI and individual BW (every 14 d) were collected. On d 56, cattle from treatments CON, YCW A, and YCW C (21 pens; 7 pens per treatment; 4 heifers per pen) were fitted with vaginal temperature (VT) recording devices. On d 63 cattle were weighed and challenged with a s.c. dose (0.5 μg/kg of BW) of lipopolysaccharide (LPS). A final BW was collected and VT devices were removed after 14 d. A significant source × treatment interaction was detected, and data were separated accordingly. In source 1, YCW C heifers exhibited greater BW at d 42 and ADG from 0 to 42 d compared with all other treatments (P = 0.02 and P < 0.01). In source 2, an increased linear effect for YCW A was detected for BW, ADG, and G:F from d 0 to 14. Following the s.c. LPS challenge, source 1 YCW C heifers exhibited greater ADG (P < 0.01) and G:F (P = 0.01) compared with CON. In source 2, no significant differences in performance were observed after LPS (P > 0.62). There was an increase in VT in all treatments after LPS (P < 0.01), with YCW C maintaining greater VT after LPS than CON and YCW A (P < 0.05) for both sources. These results suggest that YCW supplementation can improve ADG and DMI during the receiving period and affect the physiological response to a mild endotoxin challenge during moderate to severe heat stress.

Original languageEnglish
Pages (from-to)166-175
Number of pages10
JournalProfessional Animal Scientist
Volume33
Issue number2
DOIs
StatePublished - Apr 1 2017

Keywords

  • heifer
  • performance
  • stress
  • yeast cell wall

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