Adherent cultures definition

The ability of bacteria to form biofilms by means of exopolysaccharide glycocalyx polymers may also be looked upon as a form of intrinsic resistance to microbicides. These polymers cause the bacteria to adhere irreversibly to surfaces. For certain microbicides the biofilm represents a penetration barrier within which the microorganisms are protected. In some instances biofilm formation explains the failure of microbicides which at certain concentrations have definitely proved effective against the microbes in free cell cultures. 

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