sentences:  Medically, biofilms afford infectious microorganisms a variety of advantages over their planktonic, fre-floating counterparts, including greatly increased tolerances to antimicrobial agents and the host immune system.Thus, degrading the biofilm may increase antibiotic efficacy, and potentiate host immune function and healing ability.For example, a combination of alpha-amylase and cellulase was shown to degrade polymicrobial bacterial biofilms from both "in vitro" and "in vivo" sources, and increase antibiotic effectiveness against them.