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Table 2 Effect of Tween 20 and Cremophor El on the antimicrobial activity of OV EO

From: Chemical profiling, biostatic and biocidal dynamics of Origanum vulgare L. essential oil

SystemOil conc. (%v/v)Test microorganism (ATCC no.)
S. aureus (6538)E. coli (8729)C. albicans (10231)
Viable count, CFU/mla (%killing)
Waterb05.58 × 1062.05 × 1072.58 × 106
25.02 × 103 (99.902)< 5.00 × 101 (> 99.999)2.35 × 103 (99.909)
Tween 20, 1%05.26 × 1069.50 × 1065.25 × 105
21.18 × 105 (97.8)<5.00 × 101 (> 99.999)1.35 × 104 (97.429)
Crempohor El, 1%05.25 × 1069.55 × 1065.25 × 105
22.00 × 105 (96.20)< 5.00 × 101 (> 99.999)8.30 × 103 (98.40)
  1. aAverage of three determinations carried out by surface viable method after 5 min at RT (24 °C)
  2. bThe system was intermittently vortexed for 5 min