Selenite broth is a type of culture medium used in microbiology to selectively enrich certain bacteria, particularly Salmonella species. It contains selenite, which inhibits the growth of many other bacteria while allowing Salmonella to thrive. This makes it useful for isolating these pathogens from food samples or clinical specimens. The broth is typically prepared by dissolving selenite in water along with other nutrients that support bacterial growth. After incubation, samples can be further analyzed using additional tests to confirm the presence of Salmonella or other target organisms.