Why bile salt incorporated into the culture medium?

Bile salts are incorporated into culture media to selectively enhance the growth of certain bacteria, particularly those that can tolerate or thrive in bile-rich environments, such as enteric pathogens. They inhibit the growth of non-target organisms, allowing for the isolation and identification of specific species. Additionally, bile salts can simulate the intestinal environment, making the culture conditions more reflective of the natural habitat of these bacteria.