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Table 4 Antibacterial sensitivity of Portulaca quadrifida extracts

From: Determination of antioxidant and antimicrobial activities of the extracts of aerial parts of Portulaca quadrifida

Test bacteria Concentration in (mg/L) Mean zone of inhibition ± SD (mm)
Petroleum ether Chloroform Methanol
Escherchia coli 250 7.1 ± 1.6 8.0 ± 2.0 11.88 ± 1.0
200 5.3 ± 1.3 4.0 ± 0.7 9.7 ± 0.8
150 1.2 ± 0.8 1.8 ± 2.6 6.4 ± 1.3
100 Growth Growth 3.8 ± 1.7
50 Growth Growth Growth
Klebsiella pneumoniae 250 5.3 ± 1.1 5.78 ± 0.5 10.3 ± 1.3
200 2.5 ± 0.6 3.1 ± 2.1 5.2 ± 0.6
150 Growth Growth 1.5 ± 1.4
100 Growth Growth Growth
50 Growth Growth Growth
Staphylococcus aureus 250 10.3 ± 2.2 10.7 ± 3.0 17.3 ± 2.0
200 6.2 ± 2.1 6.8 ± 2.5 10.2 ± 1.75
150 1.2 ± 1.0 1.5 ± 0.7 5.3 ± 0.6
100 Growth 1.2 ± 0.5 2.35 ± 0.5
50 Growth Growth Growth
Streptococcus pyogenes 250 8.7 ± 1.7 9.3 ± 2.1 10.8 ± 2.5
200 5.0 ± 1.3 6.8 ± 1.2 7.3 ± 1.8
150 2.9 ± 1.8 1.4 ± 2.3 3.0 ± 2.5
100 Growth Growth Growth
50 Growth Growth Growth
  1. Values are expressed in mean ± SD of three individual experiments
  2. The word “growth” represents zero inhibition zone the extract at a given concentration