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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