Enrichment media work by providing selective nutrients that favor the growth of the target organism while containing inhibitory substances that suppress the growth of non-target organisms. For instance, Selenite F Broth contains sodium selenite, which inhibits the growth of competing bacteria, thus enabling the selective proliferation of Salmonella species. The effectiveness of these media depends on their ability to create an environment conducive to the target pathogen's growth while limiting the growth of others.
