Diet Changes in Young Chickens Reduce Harmful Bacteria in the Gut

Jim Crocker
24th June, 2024

Diet Changes in Young Chickens Reduce Harmful Bacteria in the Gut

Key Findings

  • The study by Wageningen University examined how different diets affect the gut microbiota of broiler chickens
  • Butyrate supplementation significantly reduced harmful bacteria like Enterococcus faecium and Enterococcus hirae in young broilers
  • Early dietary interventions can positively influence gut health and potentially improve immune function in broilers
Modern broiler breeds are known for their high feed efficiency and rapid growth, which unfortunately come with increased susceptibility to pathogens and disease. The composition of the gut microbiota, influenced by diet, plays a significant role in broiler growth rate, feed efficiency, and overall health. A recent study conducted by Wageningen University aimed to assess how different diet compositions affect the broiler jejunal gut microbiota[1]. The study involved 96 broiler chickens divided into four diet groups: control, coated butyrate supplementation, medium-chain fatty acid supplementation, and a high-fibre low-protein content. These groups were further subdivided into age groups (4, 12, and 33 days of age), resulting in groups of 8 broilers per diet per age. The jejunum content was analyzed using metagenomic shotgun sequencing to determine the microbiota taxonomic composition at the species level. The composed diets resulted in a total of 104 differentially abundant bacterial species. One of the most notable findings was the butyrate-induced changes in the jejunal microbiota of broilers 4 days post-hatch. The relative abundance of Enterococcus faecium and the opportunistic pathogen Enterococcus hirae was significantly reduced in broilers fed with butyrate supplementation compared to the control diet. This effect occurs during early broiler development, which is critical for broiler health, highlighting the importance of diet in influencing microbiota composition and, consequently, broiler health. This study ties in with previous findings that emphasize the importance of early broiler development for immune system maturation. For instance, it has been shown that the immune system of broiler chickens does not mature until days 30 to 34, with the period from days 6 to 13 being particularly critical due to low immune function[2]. Enhancing the immune function through nutritional measures from day 1 to 30 is necessary[2]. The current study supports this by demonstrating how diet can positively influence gut microbiota and potentially improve immune function during these critical early stages. Moreover, the study's findings align with the historical context of genetic selection in broilers. Over the past 50 years, broilers have been selectively bred for rapid growth, which has inadvertently affected their immune response[3]. The identification of genetic variants in genes such as TLR3 and PLIN3, which are associated with enhanced growth performance at the expense of immune function, underscores the need for dietary interventions to mitigate these adverse effects[3]. By understanding how diet influences gut microbiota, it may be possible to develop nutritional strategies that support both growth and immune health in modern broilers. Additionally, the study's focus on gut health is relevant to addressing diseases like ascites, a condition linked to rapid growth and poor oxygenation in broilers[4]. Ascites remains a significant economic concern, and understanding the genetic and dietary factors that contribute to its incidence is crucial for developing effective prevention strategies[4]. The current study's insights into how butyrate supplementation can alter gut microbiota composition provide a potential avenue for reducing disease susceptibility in broilers. In conclusion, the study conducted by Wageningen University demonstrates the significant impact of diet on the gut microbiota composition of broilers and its implications for their health. By identifying how different dietary supplements, such as butyrate, can influence the abundance of specific bacterial species, the research highlights the potential for nutritional interventions to improve broiler health during critical early developmental stages. These findings build on previous research emphasizing the importance of early immune system development and the need for dietary strategies to support both growth and immune function in modern broilers.

NutritionHealthAnimal Science

References

Main Study

1) Diet-induced changes in the jejunal microbiota of developing broilers reduce the abundance of Enterococcus hirae and Enterococcus faecium

Published 23rd June, 2024

https://doi.org/10.1186/s12864-024-10496-8

Related Studies

2) Effects of age on immune function in broiler chickens.

https://doi.org/10.1186/s40104-021-00559-1

3) Accumulation of genetic variants associated with immunity in the selective breeding of broilers.

https://doi.org/10.1186/s12863-020-0807-z

4) Multi-generational genome wide association studies identify chromosomal regions associated with ascites phenotype.

https://doi.org/10.3382/ps/pew478


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