show Abstracthide AbstractMicrobial species in jejunum of piglets were detected by 16s sequencing technology, including three groups. Group A was fed ABX for 7 days, PBSfor 7 days, and then fed PEDV virus. Group B was fed ABX for 7 days, then LG for 7 days, and then fed PEDV virus. Group C was continuously fed PBS as the control group, that is, the healthy group.