Used of Antibiotics Against Gastric Microflora

The intestinal colon consists of a variety of bacteria, some may beneficial/pathogenic to human health, and does the disturbance of gastric microflora, especially the use of antibiotics, will have any impact on maternal IgA production? Here Professor Nochi demonstrated that providing mice with antibiotics, especially vancomycin or mix treated mice, will dramatically change the microflora pattern of mice.