Microecologics can improve the feed conversion rate, the intestinal histology and the immunesystem of animals, and inhibit the adhesion of pathogenic bacteria through improvement of theintestinal microecology environment of broilers. So far most studies have been focused on the detectionand analysis of apparent traits and physio-biochemical indicators; the molecular mechanism of probioticactions is yet unclear. The objective of this study is to undermine the molecular mechanisms ofprobiotics to improve the ...