The two enrichment media plates are
Selenite broth
It is a enrichment media for the salmonella species from fecal specimens.As the coliforms and other microbial specimens cannot grow on selenite hence selenite is used to grown and isolate salmonella in fecal matter.
Alkaline peptone water
The alkaline peptone water is used for isolation of the vibrio cholera from clinical and water samples.As 2 percent sodium chloride added to media gives it an alkaline nature in which vibrio can grow whereas most of other unwanted microbes find it difficult to grow.
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