Objective: To study bacterial and lactobacilli communities in stomach of neonatal piglets from 7 to 35(two weeks after weaning) days of age.Methods: The semi-quantitative Dilution-PCR,PCR-DGGE and sequencing were used to analyze the shifts of stomach total bacterial and lactobacilli community.Results: Stomach pH value was around 3.0 before weaning and increased apparently after weaning.Dilution-PCR showed that bacterial concentration in stomach of piglet was very low before weaning and increased significant...