Synergistic efficacy of phages along with vancomycin for eradication of vancomycin-resistant Enterococcus faecalis biofilms

Table 1 Biofilm forming efficiency of Enterococcus faecalis based on defined criteria

Criteria for classification	Optical density value	Total	%
OD ≤ ODcut = No biofilm formers	OD < 0.264	0	0
ODcut < OD ≤ 2 × ODcut = Weak biofilm formers	0.264 < OD ≤ 0.528	3	16
2 × ODcut < OD ≤ 4 × ODcut = Moderate biofilm-formers	0.528 < OD ≤ 1.056	7	37
OD > 4 × ODcut = Strong biofilm formers	OD > 1.056	9	47
	Total	19	100

OD: Optical density.