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Table 3 Inhibition zone diameter of Blechnum orientale extracts and standard antibiotics against five Gram-positive bacteriaa

From: Blechnum Orientale Linn - a fern with potential as antioxidant, anticancer and antibacterial agent

  bInhibition zone diameter (mm)
  B. cereus M. luteus MSSA MRSA S. epidermidis
cCrude 9.5 11.3 9.5 10.5 9.0
cPEf 7.0 7.5 7.9 8.0 -
cCf 7.5 7.8 - 8.5 -
cEAf 11.0 13.8 10.8 13.0 9.1
cButf 11.0 14.3 12.0 13.0 11.3
cWatf 10.3 12.8 10.5 11.5 9.8
dStreptomycin 18.0 24.0 16.6 - -
dVancomycin 18.0 30.0 17.5 20.0 19.5
dOxacillin 8.0 48.0 22.3 - 25.5
  1. Results are mean from three sets of experiments, each set in triplicate.
  2. a No activity was found against Gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa, Enterobacter aerogenes, Salmonella choleraesius; Klebsiella pneumoniae). Data not shown.
  3. b Inhibition zone diameter includes diameter of disc (6 mm); (-): not active
  4. c Extracts were tested at 1 mg/disc
  5. d Reference antibiotics discs: Streptomycin 10 μg; vancomycin 30 μg; oxacillin 1 μg