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Published on: September 15, 2015
Exploring the Functional Potential of the Broiler Gut Microbiome Using Shotgun Metagenomics
Nuria Peña1, Irene Lafuente1, Ester Sevillano1
1Departamento de Nutrición y Ciencia de los Alimentos (NUTRYCIAL), Sección Departamental de Nutrición y Ciencia de los Alimentos (SD-NUTRYCIAL), Facultad de Veterinaria, Universidad Complutense de Madrid (UCM), Avenida Puerta de Hierro, s/n, 28040 Madrid, Spain.
The poultry gut, especially the cecum, is rich in antimicrobial peptides (AMPs) and resistance genes. This discovery supports antibiotic-free poultry production and safer food systems.
Area of Science:
- Microbiology
- Genomics
- Food Safety
Background:
- Antimicrobial peptides (AMPs) offer sustainable alternatives to antibiotics in livestock.
- AMPs modulate host-associated microbiomes, impacting microbial composition and function.
- Metagenomic sequencing and bioinformatics advance the study of AMPs in ecosystems.
Purpose of the Study:
- To analyze AMP diversity and activity in broiler chicken gut microbiomes.
- To identify biosynthetic gene clusters (BGCs) and antimicrobial resistance genes (ARGs).
- To explore the potential of poultry gut AMPs for antibiotic-free production.
Main Methods:
- Illumina-based next-generation sequencing (NGS) of intestinal contents from broiler chickens.
- Analysis of six distinct gut sections.
- De novo assembly and bioinformatic annotation of genetic data.
Main Results:
- Identification of BGCs encoding ribosomally synthesized and post-translationally modified peptides (RiPPs).
- Detection of other specialized bioactive secondary metabolites, ARGs, and virulence factor genes (VFGs).
- The cecum showed the highest genetic richness, with diverse RiPP-like clusters and antimicrobial resistance determinants.
Conclusions:
- The poultry gut, particularly the cecum, is a significant reservoir of AMPs.
- These findings have implications for antibiotic-free poultry production.
- The study contributes to enhanced food safety strategies.
