Table 2.

MIC values of the crude extracts obtained from different extractions rhizomes of Posidonia oceanica against Gram-positive and Gram-negative bacteria. Data represented as the standard error of mean (±S.E.M). MR¹-viscous part from the methanolic crude extract of rhizome. MR²-granulated part from the methanolic crude extract of rhizome. ER-ethanolic extract of the rhizome. NC-no change.

Extract		Gram- positive bacteria		Gram-negative bacteria
		S. aureus ATCC 25923	E. faecalis ATCC 29212	E. coli ATCC 25922	K. pneumoniae ATCC 700603
Rhizome (mg/mL)	MR1	1 ± 0	1 ± 0.33	NC	NC
	MR2	1 ± 0	1 ± 0.17	NC	NC
	ER	0.5 ± 0	0.5 ± 0.17	NC	NC
	Acetone	NC	NC	NC	NC
	Dichloromethane	NC	NC	NC	NC
	Chloroform	NC	NC	NC	NC
Control (mg/L)	Ciprofloxacin	0.125 ± 0	0.5 ± 0.083	0.008 ± 0	0.125 ± 0.021