Fascinating! Diet is a major factor influencing gut microbiome composition; plant-based diets have been shown to foster a healthier gut environment. The Standard American Diet, heavy in animal products, along with chronic stress, fosters environments for pathogenic bacteria. Dr. Michael Greger has a number of informational videos and articles summarizing peer-reviewed scientific studies related to this topic: https://nutritionfacts.org/?fwp_search=microbiome&fwp_content_type=video