Impacts of different rearing programs on caecal microbiota composition of commercial broiler chickens

The objective of the present study were to evaluate the composition of the intestinal microbiota in commercial poultry farms adopting short-term antibiotic withdrawal (15 months) and long-term judicious use strategy (six years). This study highlights the potential impacts of different rearing programs in poultry production and will help guide future policies in order to reduce the use of antibiotics while maintaining production performance.