<P> For some purposes, certain bacteria are able to hydrolyze aesculin . A plate containing aesculin will fluoresce a pale blue under UV radiation . Some bacteria can hydrolise this, leading to UV dark colonies, as opposed to UV light ones . </P> <P> When new techniques are produced to identify enterococci, they are often compared to the use of bile esculin agar . </P>

What is the role of esculin in bea