Table 2.

General composition of BFs.

BF Biomass	Organized communities of pathogens	Sessile cells	Cells attached to surfaces forming highly coordinated microcolonies, communicating by the QS system, and lacking motility
		Persistent cells	Small subpopulation of microorganisms reversibly transformed into slowly growing cells
		Dormant cells
	Extracellular polymeric substances (EPSs)	Enzymatic proteins	Polypeptides
		Polysaccharides	Cellulose Polyglucosamine (PGA) Anexopolysaccharides
		Extracellular DNA (eDNA)
		Cationic and anionic glycoproteins
		Cationic and anionic glycolipids	Allow real communication between bacteria Stabilize the 3-D structure of BF