Biofilms In Ear infections A biofilm is a thin layer of microbial slime and proteins adhering to a surface. Biofilm forms when bacterial cells adhere to a surface and produce a matrix of extracellular polymeric substances (EPS), a sticky, glue-like material. The bacteria remain embedded within the EPS, which protects them Bacteria and fungi are present naturally in the air and water. This can attach to damp surfaces…