Research Note: Preliminary assessment of the impact of dietary yeast products on egg production and cecal microbial profiles of laying hens.

2023-10
Poultry science 102(10)

PubMed: 37499614
DOI: 10.1016/j.psj.2023.102934

Study Design

Type: Clinical Trial
Population: 35 laying hens
Methods: A short-term feeding study with 35 laying hens receiving either a control, or 1 of 4 different yeast fermentation products, Immunowall, Hilyses, Citristim, and Maxi-Gen Plus, with 7 hens per treatment from 40 to 46 wk of age; at the end of the trial, hens were euthanized and the ceca removed for denatured gradient gel electrophoresis (DGGE) microbial compositional analyses.

Animal Study

The objective of the current study was to conduct an initial comparison of commercial yeast products in layer hen diets on egg production parameters and the corresponding impact on the cecal microbiota. A short-term feeding study was conducted with 35 laying hens receiving either a control, or 1 of 4 different yeast fermentation products, Immunowall, Hilyses (both from ICC, São Paulo, Brazil), Citristim (ADM, Decatur, IL), and Maxi-Gen Plus (CBS Bio Platforms, Calgary, Canada) with 7 hens per treatment from 40 to 46 wk of age. At the end of the trial, hens were euthanized, the ceca removed and prepared for denatured gradient gel electrophoresis (DGGE) microbial compositional analyses. Although initial shell weight and shell thickness were similar among the treatment groups, hens fed Hilyses had lower shell weight and thickness at the end of the experiment. The most predominant DGGE bands with the strongest intensity were identified as Lactobacillus species and excised double bands were identified as Bacillus, Clostridium, or Lachnospiraceae. In this short-term feeding trial, the commercial yeast products tested had little effect on egg production and shell quality, and only moderately impacted the composition of mature layer hen cecal microbiota.

Research Insights

Supplement	Dose	Health Outcome	Effect Type	Effect Size	Source