Metagenomic analysis reveals linkages between cecal microbiota and feed efficiency in Xiayan chickensOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
Researchers examined how cecal microbiota relate to feed efficiency in Xiayan chickens, an indigenous Chinese breed from Guangxi province. They compared 173 males and 167 females split into high and low feed efficiency groups by residual feed intake.
How was it studied?
Cecal contents from chickens at the extremes of feed efficiency, 3 highest and 3 lowest residual feed intake per sex, were profiled by shotgun metagenome sequencing. Linear discriminant analysis effect size (LEfSe) identified taxa distinguishing high versus low feed efficiency groups, and predicted gene functions were compared between groups.
What did they find?
Bacteroides, Prevotella, and Alistipes were the most abundant genera overall. LEfSe found 6 biomarkers in males and 14 in females; Lactobacillus was consistently higher in high efficiency birds of both sexes, while Campylobacter avium (females) and Helicobacter pullorum (males) were enriched in low efficiency birds. High efficiency males also showed greater predicted capacity for xenobiotic biodegradation and metabolism.
Why it matters
The findings link specific cecal taxa, notably Lactobacillus enrichment and pathogen depletion, to better feed efficiency, and show that sex shapes these microbiome-performance relationships. This points to candidate microbial biomarkers for improving efficiency in indigenous chicken breeds.