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PSIV-6 Effect of a Direct Fed Microbial Feed Additive on Finishing Beef Cattle Performance and Liver Abscess Rate by Kelton Adair; Samodha Fernando; Galen E Erickson; Alison Bartenslager; Zachary E Carlson is a Agricultural and Biological Sciences article available to read on EtoBox.

What is PSIV-6 Effect of a Direct Fed Microbial Feed Additive on Finishing Beef Cattle Performance and Liver Abscess Rate about?

## Abstract A feedlot study was conducted comparing the effects of a direct-fed microbial feed additive (DFM) to no feed additive (CON) on performance and liver abscess rates in finishing beef cattle. The study utilized 60 crossbred steers (initial BW 274 kg ± 2.23) individually fed using a Calan gate system. Steers were housed in separate pens by treatment to avoid DFM cross-contamination, with pen (barn of 30 steers) assigned randomly to each treatment. Cattle were fed a diet consisting of 15% corn silage, 36.5% high moisture corn, 24.5% dry rolled corn, 20% modified distillers grains, and 4% supplement for 189 days. The DFM counts were estimated using cell cytometry and was top dressed at a concentration of approximately 81 billion bacterial cells/head/day. The DFM additive used in this study was developed to reduce the abundance of Fusobacterium necrophorum and Streptococcus bovis in the rumen. No effect of treatment on hot carcass weight (HCW), average daily gain (ADG), dry matter intake (DMI), feed efficiency (G:F), or carcass traits (Table 1) were observed. No significant difference in the occurrence of liver abscesses between treatment groups were observed with 4 steers hav

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Author

Kelton Adair; Samodha Fernando; Galen E Erickson; Alison Bartenslager; Zachary E Carlson

Publisher

Oxford University Press (OUP)

Published

2021

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)