Table 1. Effect of PGPE on catalase and haemolytic activity of test bacteria.

Organism	Concentration of extract, μg/ml	% Change in catalase activity (mean ± SD)	% Inhibition in Hemolysis (Mean ± SD)
C. violaceum	10	-4.65 * ± 2.46	8.83 * ± 3.46
	25	-5.81 * ± 3.28	22.09 ** ± 2.40
	50	-8.13 * ± 1.64	28.72 ** ± 3.79
	100	-11.62 * ± 6.57	35.91 *** ± 3.02
P. aeruginosa	10	0.79 ± 0.62	-9.19 ± 6.27
	25	0.78 ± 0.44	15.47 * ± 3.33
	50	-1.77 ± 0.47	22.61 * ± 4.89
	100	-2.56 * ± 0.15	33.33 ** ± 3.83

* p<0.05, ** p<0.01, *** p<0.001; Catalase assay was done by monitoring disappearance of H ₂O ₂ at 240 nm; Hemoglobin concentration was measured at OD _540; DMSO in ‘vehicle control’ tube had no effect on catalase and haemolytic activity of any of the three bacteria; Chloramphenicol (0.5 μg/ml) enhanced catalase activity of C. violaceum by 11.23%*.± 0.01; Tetracycline (0.5 μg/ml) inhibited catalase activity of P. aeruginosa by 21.51%* ± 0.02.