Antimicrobial Fatty Acids from Green Alga Ulva rigida (Chlorophyta)

Table 2

Antimicrobial activity of U. rigida collected seasonally from Ghar El Melh lagoon (data are in mm of inhibition diameter).

	Dichloromethane				Dichloromethane/methanol
	Winter	Spring	Summer	Autumn	Winter	Spring	Summer	Autumn
E. coli O126 B16	-	-	-	-	8±0	11,3±1.1	7±0	8±0
V. tapetis CECT 4600	-	-	-	12±0	-	-	-	11,5±0.5
P. cepacia	-	-	11,8±0.2	12,6±0.5	11,6±0.5	9,6±0.5	14,3±0.5	12±0
P. aeruginosa ATCC 27853	-	11±0	7±0	-	-	-	-	-
A.eromonas salmonicida	14±0	14±0	14±0	14±0	12±0	10±0	11±0	11±0
A. hydrophilaB3	-	11±0	-	15,6±0.5	9,3±1.1	10±0	14±0	15±1
S. typhymurium	11,3±1.1	-	-	12±0	12±0	15,6±0.5	11,6±0.5	14±0
Str. agalactiae	12,3±0.5	11,6±0.5	14±0	14,6±1.1	10,3±0.5	8,6±0.5	14,3±1.5	14,6±0.5
S. aureus	7±0	7±0	8,6±0.5	10±0	10±0	12,6±2.3	13,3±1.1	16±0
S. aureus ATCC 25923	13±1	17,3±1.1	17±0	16±0	10±0	16±0	18±0	16±0
S. aureus ATCC 6538	10,3±0.5	11±0	13±0	10,3±0.5	9±0	10±0	13,6±0.5	11±0
E. faecalis ATCC 29212	11,5±0.8	11,3±1.1	14,3±0.5	15,6±0.5	12±0	11,3±1.1	14±0	17±1

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