Table 3

Diameters of the zones of inhibition for the 80% aqueous methanolic extracts of WSREt, WSFEt and WSLEt on several species of Gram-negative bacteria
Test organisms Diameters of zones of inhibition (mm)
WSREt WSFEt WSLEt Tetracycline (100 μg/ml)
Escherichia coli 15.00 ± 0.96c 12.00 ± 1.50d 28.00 ± 0.56b 43.00 ± 1.90a
Salmonella typhi 13.00 ± 0.43c 14.00 ± 0.79c 32.00 ± 0.75b 47.00 ± 1.42 a
Citrobacter freundii 11.00 ± 0.86c 9.00 ± 1.21c 23.00 ± 1.27b 38.00 ± 1.22 a
Pseudomonas aeruginosa 9.00 ± 1.32c 10.00 ± 1.43c 26.00 ± 1.08b 40.00 ± 0.59 a
Klebsiella pneumoniae 10.00 ± 1.10c 8.00 ± 1.61c 19.00 ± 1.48b 36.00 ± 1.13 a

Each value represents the mean ± SD of three different observations. Different letters in each row indicate a significant difference (p<0.05).

Alam et al.

Alam et al. BMC Complementary and Alternative Medicine 2012 12:175   doi:10.1186/1472-6882-12-175

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