Antimicrobial Fatty Acids from Green Alga Ulva rigida (Chlorophyta)

Table 3

Antimicrobial activity of U. rigida collected seasonally from Cap Zebib shore (data are in mm of inhibition diameter).

	Dichloromethane				Dichloromethane/methanol
	Winter	Spring	Summer	Autumn	Winter	Spring	Summer	Autumn
V. alginoliticus	-	10,3±0.5	8±0	7,6±0.5	-	-	-	-
A. salmonicida	15±0	12,8±0.2	9±0	-	11,6±0.5	-	8,3±0.5	8±1.7
Str. agalactiae	15±0	12,3±1.1	15±1	10,3±0.1	9,6±0.5	6,3±0.5	16,3±0.5	11±0
S. aureus	9,6±0.5	8,8±0.2	10,3±0.5	10,3±0.5	8,3±0.2	-	11,3±0.5	11,6±0.5
S. aureus ATCC 25923	12,8±0.2	12,3±0.5	12,6±0.5	10,8±0.2	9,1±0.2	6,6±1	16,3±1.1	10,6±0.5
S. aureus ATCC 6538	10±0	10,6±0.5	10±0.2	10,6±0.5	10,6±0.5	11±0	12,8±0.2	10±0

Extracts were tested at concentrations of 500 μg/disc; +/-: represents the standard deviation; the number of independent replicates was n=3.