Table 2.

Antibacterial activity (MIC) of PLX^® (µg/ml) against the strains used in this study under the conditions indicated^a

Bacteria tested	Minimum inhibitory concentration (MIC) (µg/ml)
	35ºC/std pH	35ºC/pH 5.5	10ºC/std pH	10ºC/pH 5.5	4ºC/std pH	4ºC/pH 5.5
Escherichia coli O157:H7	4,375.00 ± 1,157.28a	10,000 ± 0.00a	1,250 ± 0	2,500.00 ± 0.00a	195.31 ± 78.12a	≤78.12b
Escherichia coli O111	4,375.00 ± 1,157.28a	10,000 ± 0.00a	1,250 ± 0	2,500.00 ± 0.00a	195.31 ± 78.12a	≤78.12
Escherichia coli ATCC 25922	4,583.33 ± 1,212.68a	10,000 ± 0.00a	1,250 ± 0	3,750.00 ± 1,433.77a	156.25 ± 0.00a	≤78.12
Enterococcus faecalis	3,352.27 ± 1953.18a	7,500.00 ± 2,672.61b	1,250 ± 0	2,500.00 ± 0.00a	312.50 ± 0.00b	≤78.12

^aData are expressed as means ± SD. In each column, different letters mean significant differences (p < .05). 24 hr of culture at 35ºC, 120 hr of culture at 10ºC, and 240 hr of culture at 4ºC.

^bIt is the lowest concentration used in the assay. std pH, standard pH (7.4 for Escherichia coli or 6.7 for Enterococcus faecalis).