Table 3.

Antibacterial activity of compounds isolated from Pseudomonas aeruginosa UWI-1.

	Minimum Inhibitory Concentration/Minimum Cidal Concentration (µg mL−1)
	Gram Positive					Gram Negative
	Rods			Cocci		Rods			Cocci
Compound	Bacillus Cereus	Listeria Monocytogenes	Corynebacterium Diphtheria	MR-Staphylococcus Aureus	Streptococcus Pyogenes	Escherichia Coli	Salmonella Enteritidis	Klebsiella Oxytoca	Neisseria Meningitides	Haemophilus Influenza
1	4/4	8/8	16/32	2/4	1/2	32/128	64/128	128/>512	32/32	32/32
2	64/128	128/256	32/64	32/32	64/64	NI	NI	NI	NI	NI
3	2/16	4/16	16/64	2/4	1/16	32/128	2/4	16/32	4/16	1/2
Kanamycin	32/32	64/64	128/NI	128/128	256/NI	4/4	8/16	4/16	16/16	32/32
Erythromycin	<1/2	4/4	NI	2/2	32/64	256/256	NI	NI	NI	128/128

NI; No inhibition observed at the concentrations tested (512–1 µg mL⁻¹). Antibacterial activity was determined using the broth microdilution assay to determine the minimum inhibitory concentration (MIC) of the test compounds. Minimum bactericidal concentration (MBC) was assessed by plating samples from wells with negative growth in the MIC determination assay. Values represent the average MIC/MBC of three replicates (n = 3). In each case no deviation was observed and therefore the SD = ± 0.0. Kanamycin was used as a Gram-negative positive control and Erythromycin was used as a Gram-positive positive control in this study.