Enrichment cultures and selective cultures are both techniques used in microbiology to isolate and grow specific microorganisms.
An enrichment culture aims to enhance the growth of particular microbes from a mixed population, often by providing specific nutrients or conditions that favor certain organisms. This method does not inhibit others but allows for the growth of the target microbe while others may grow slower.
In contrast, a selective culture is designed to inhibit the growth of unwanted organisms while promoting the growth of the desired species. This is achieved through specific inhibitors or conditions that suppress competing microorganisms.
In summary, enrichment focuses on enhancing growth without suppression, whereas selective cultures intentionally restrict certain organisms to favor others.