<P> Enrichment culture is the use of certain growth media to favor the growth of a particular microorganism over others, enriching a sample for the microorganism of interest . This is generally done by introducing nutrients or environmental conditions that only allow the growth of an organism of interest . Enrichment cultures are used to increase a small number of desired organisms to detectable levels . This allows for the detection and identification of microorganisms with a variety of nutritional needs . Enrichment cultures are often used for soil and fecal samples . </P> <P> The microbiologist (and botanist) Martinus Beijerinck is credited with developing the first enrichment cultures . Sergei Winogradsky also experimented on bacteria using different cultures . </P>

How does the use of enrichment media aid in isolation